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2289 Cards in this Set
- Front
- Back
What kind of protein is dynein?
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Dynein is an ATPase.
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What is the protein responsible for unwinding the DNA double helix?
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DNA Helicases
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Describe the role of dynein in cilia structure.
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Dynein links peripheral 9 doublets of microtubules.
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What are the three modifications made to RNA before it leaves the nucleus?
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5' capping with 7-methylguanosine, 3' polyadenylation, and splicing of introns
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What is the protein that prevents supercoling during replication?
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DNA topoisomerases
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What is the function of smooth ER?
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Is the site of steroid synthesis and detoxification of drugs and poisons
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How is the function of gap junctions accomplished?
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Through a connection with central channels.
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What are Nissl bodies?
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rough ER
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What is another name for macula adherens?
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Desmosome
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What is the primary source of energy for the Liver?
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Amino acids, lipids, glucose, fructose, and lactate
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What are the two Hardy-Weinberg equations?
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P^2 + 2pq + q^2 = 1 and p + q = 1
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Define poikilocytosis
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varying cell shapes
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What is another name for zona adherens?
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Intermediate junction.
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Which cells are rich in smooth ER?
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1. liver hepatocytes, 2. steroid hormone-producing cells of adrenal cortex.
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What are the conditions for the Hardy-Weinberg equilibrium?
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No mutations, No selection, Random mating, and No migration
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What is another name for zona occludens?
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Tight junction.
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Describe microtubule arrangement of cilia.
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9+2 arrangement of microtubules.
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Name five types of epithelial cell junctions.
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1. zona occludens 2.zona adherens 3.macula adherens 4.gap junction 5.hemidesmosome
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How does dynein function in cilia function?
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Dynein causes the bending of cilium by differential sliding of doublets.
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Describe the histological structure of sinusoids of the liver.
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Irregular 'capillaries' with round pores 100-200 nm in diameter and no basement membrane.
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What is the function of rough ER?
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Is the site of synthesis of secretory (exported proteins and of N-linked oligosaccharide addition to many proteins.
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Define macula adherens.
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Small, discrete sites of attachment of epithelial cells.
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What is the function of hemidesmosomes?
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Connect cells to underlying extracellular matrix.
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What are the functions of the lymph node?
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1. Nonspecific filtration by macrophages. 2. storage/proliferation of B and T cells 3. Ab production.
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Which cells are rich in rough ER?
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1. Mucus-secreting goblet cells of small intestine, 2. antibody-secreting plasma cells.
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What is the function of Nissl bodies?
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Synthesize enzymes (e.g. ChAT) and peptide neurotransmitters.
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Name a protein involved in the structure of hemidesmosomes.
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Integrin.
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What is the type of mutation that causes a loss of DNA?
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Deletion
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Define anisocytosis
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varying cell sizes
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For the following genetic transfer procedure, explain the process: Conjugation
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Direct cell to cell DNA transfer
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For the following genetic transfer procedure, explain the process: Transduction
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Phage-mediated cell to cell DNA transfer
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For the following genetic transfer procedure, explain the process: Transformation
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Purified DNA taken up by a cell
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For the following genetic transfer procedure, explain the process: Transposition
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DNA transfer to same or another chromosome or plasmid WITHIN a cell
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For the following genetic transfer procedure, give the types of cells involved: Conjugation
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Prokaryotic
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For the following genetic transfer procedure, give the types of cells involved: Transduction
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Prokaryotic
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For the following genetic transfer procedure, give the types of cells involved: Transformation
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Prokaryotic or eukaryotic
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For the following genetic transfer procedure, give the types of cells involved: Transposition
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Prokaryotic or eukaryotic
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For the following genetic transfer procedure, give the nature of DNA transferred: Conjugation
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Chromosomal or plasmid
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For the following genetic transfer procedure, give the nature of DNA transferred: Transduction
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Generalized transduction: Any gene Specialized transduction: Only certain genes
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For the following genetic transfer procedure, give the nature of DNA transferred: Transformation
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Any DNA
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For the following genetic transfer procedure, give the nature of DNA transferred: Transposition
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DNA sequences ""jumping genes""
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Woman with anxiety about an exam is told to relax and imagine going through the steps. What process is this?
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Systematic desensitization.
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65-year old man is diagnosed with incurable adenocarcinoma. His family asks you not to tell him. What do you do?
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Assess whether telling the patient will negatively affect his health. If not, tell him.
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Girl can groom herself, can hop on 1 foot, and has an imaginary friend. How old is she?
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4 years old.
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36-year old woman with a family history of breast cancer refuses mammogram b/c she heard it hurts. What do you do?
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Discuss the risks and benefits of not having a mammogram. Each patient must give her own informed consent to each procedure. Pt has final say
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During sleep, man has variable blood pressure, penile tumescence, and variable EEG What stage of sleep is he in?
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REM sleep.
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15yo F of norm height and weight has enlarged parotid glands. The mother found laxatives. What is the diagnosis?
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Bulimia.
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11-year old girl exhibits Tanner stage 4 sexual development (almost full breast and pubic hair). What is the diagnosis?
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Advanced stage, early development.
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4yo F complains of a burning feeling in her genitalia. Smear of discharge shows N. gonorrhoeae. How was she infected?
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Sexual abuse.
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Person demands only the best and most famous doctor in town. What is the personality disorder?
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Narcissism.
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Nurse has episodes of hypoglycemia; blood analysis reveals no elevation in C-protein. What is the diagnosis?
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Factitious disorder, self scripted insulin.
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Observational Study. Sample chosen on presence of absence of disease. Information collected about exposure.
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Case-control Study.
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Observational study. sample chosen based on presence of absence of risk factors. Subjects followed over time for disease.
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Cohort Study.
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List 4 ways to reduce bias in a study.
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1. Blind studies. 2. Placebo responses. 3. Case-crossover design. 4. Randomization
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When the subjects choose the groups it may lead to what type of bias?
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Selection bias.
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When knowledge of the presence of the disease alters recall by the subjects what type of bias is likely?
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Recall bias.
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When subjects are not representative of the population and results are not generalizable, what type of bias is this?
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Sampling bias.
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When information gathered on subjects is done so at an inappropriate time, what bias is likely?
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Late-look bias.
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The total proportion of cases in a population at a given time.
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Prevalence.
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The rate of new cases in a population in a given time.
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Incidence.
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Incidence x Disease Duration
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Prevalence
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For chronic diseases, which is larger - prevalence or incidence?
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Prevalence > Incidence for Chronic Disease
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When does prevalence = incidence?
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For acute disease (ie the common cold)
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What is the PPV?
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The probability of having a condition given a positive test. TP/(TP+FP) = PPV
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What is NPV?
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The probability of not having the condition given a negative test. TN/(TN+FN) = NPV
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Unlike sensitivity and specificity, the predictive values are ....
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dependent on the prevalence of disease. The higher the prevalence of disease, the higher the predictive value of the test.
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a/(a+c)
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sensitivity
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d/(b+d)
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specificity
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a/(a+b)
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PPV
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d/(c+d)
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NPV
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(a/b)/(c/d)
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OR - approximates RR if prevalence of disease is not too high.
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[a/(a+b)]/[c/(c+d)]
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RR - relative risk
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Attributable risk formula?
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[a/(a+b)]-[c/(c+d)]
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The consistency and reproducibility of a test is the ....
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Precision.
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Absence of random variation in a test ....
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Precision.
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The trueness of the test measurements is the ...
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Accuracy
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Reduced precision means
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increase in random error
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Reduced accuracy means
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increase in systematic error
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Number needed to treat
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NNT = 1/(Ic-Ie); The number of pts that need to be treated to prevent 1 additional bad outcome.
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Reliability is ...
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the reproducibility of a test. a Test is reliable if repeat measurements are the same.
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Validity is ...
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whether the test truly measures what it purports to measure. A test is valid if it measures what it is supposed to measure.
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Gaussian distribution is ...
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a normal distribution (bell curve) (mean=median=mode)
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A bimodal distribution ...
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has 2 humps
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A positive skew distribution ...
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is asymmetry with the tail to the right, hump on the left (mean>median>mode)
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a Negative skew distribution ...
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is asymmetry with the tail to the left, hump on the right (mean<median<mode)
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A null hypothesis is ...
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There is no association (ie between the risk factor and the disease in the popuation.)
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The alternative hypothesis is ...
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There is some difference (ie between the disease and the risk factor in the population)
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Type 1 error (alpha)
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Stating there IS an effect or difference where none really exists.
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Type II error (beta)
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Stating there IS NOT an effect or difference when one really exists.
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Power
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the probability of rejecting the null hypothesis when it is in fact false.
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Power in a study depends on what two things ...
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1. total number of endpoints experienced by the population; 2. difference in compliance between treatment groups
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How do you increase study power
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increase the sample size.
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Confidence interval
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mean +/- 1.96 (SEM) If the CI includes 0, H0 is accepted.
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Normal (Gaussian) distribution has what percentage of the population in each standard deviation?
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68% within 1 SD, 95% within 2 SDs, 99.7% within 3 SDs.
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Correlation coefficient indicates
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the strength of the correlation between two variables. The sign indicates a positive or negative.
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What is Primary Disease Prevention?
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Prevent the disease from occuring.
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What is Secondary Disease Prevention?
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Early detection of the disease.
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What is Tertiary Disease prevention?
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Reduce mobidity from the disease.
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What are important preventative measure for patients with DM?
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Eye exams, foot exams, urine tests.
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What are important preventive measures for pts with drug abuse problems?
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HIV test, TB test, Hep immunizations.
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What are important preventive measures for pts with alcoholism?
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influenza, pneumococcal immunizations and TB testing
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What is an important preventive measure to offer obese pts?
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Blood sugar testing for diabetes.
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What is an important preventive measure to offer homeless pts or recent immigrants?
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TB tests
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What tests are important for pts engaging in high risk sexual behavior?
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HIV, Hep B, Syphilis, gonorrhea, chlamydia tests.
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What are the leading causes of death for infants in the US?
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1. Congenital anomalies 2. Short gestation/LBW 3. SIDS 4. Maternal complications of pregnancy 5. RDS
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What are the leading causes of death for children age 1-14 in the US?
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1. Injuries 2. Cancer 3. Congenital anomalies 4. Homicide 5. Heart disease
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What are the leading causes of death for people 15-24 years of age in the US?
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1. Injuries 2. Homicide 3. Suicide 4. Cancer 5. Heart disease
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What are the leading causes of death for adults 25-64 yo in the US?
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1. Cancer 2. Heart disease 3. Injuries 4. Suicide 5. Stroke
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What are the leading causes of death for adults over the age of 65 in the US?
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1. Heart disease 2. Cancer 3. Stroke 4. COPD 5. Pneumonia 6. Influenza
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Define autonomy
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The obligation to respect patients as individuals and to honor their preferences in medical care.
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What is legally required for Informed Consent?
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1. discussion of pertinent information 2. patient's agreement to the plan of care 3. freedom from cohersion
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In what circumstances is there an exception to the mandates of informed consent?
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1. Patient lacks decision making capacity. 2. Implied consent is an emergency 3. Therapeutic privilege 4. Waiver - pt waives the right to informed consent
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What is Therapeutic Privilege
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Withholding information when disclosure would severely harm the patietn or undermine informed decision making capacity.
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What are some variables in determining a patients decision making capacity?
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1. pt makes and communicates a choice 2. pt is informed 3. decision remains stable in time 4. decision is consistent with pt values and goals
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Define Transference.
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When the patient projects feelings stemming from their personal life onto their physician.
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Define Countertransference.
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When the doctor projects feelings stemming from their personal life onto the pt.
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Define classical conditioning.
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Leaning where a natural response is elicited by a conditioned stimulus that was previously presented in conjunction with an unconditional natural stimulus.
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Define operant conditioning.
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learning in which a particular action is elicited because it produces a reward.
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How does the Stanford Binet test calculate intelligence?
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IQ as (mental age/chronological age) x 100
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How does Wechsler (WAIS) measure intelligence?
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11 subtests (6 verbal, 5 performance)... Mean is 100, SD - 15.
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What is the IQ cutoff for diagnosis of mental retardation?
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IQ < 70 or 2 SD below mean.
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True or False: IQ tests are objective test.
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True ... but they are NOT projective tests.
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Are IQ scores correlated with genetic factors or school achievement?
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Yes to both ... but more highly correlated to school achievement.
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What is an oral advanced directive?
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In an incapacitated state, a pts prior oral statement is commonly used as a guide.
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What is a written advanced directive?
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a living will.
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What is a durable power of attorney?
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pt designates a surrogate to make a medical decision in the event that the patient loses decision making capacity.
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What is non-maleficence
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do no harm"". However, if benfits of an intervention outweigh the risks, a patient may make an informed decision to proceed.
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Define beneficence
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The physicians ethical responsibility to act in the patients best interest (as a fiduciary). Can conflict with autonomy.
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In what circumstances can a physician break confidentiality?
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1. potential harm to others is serious. 2. likelihood of harm to self is great. 3. no alternative means exist to warn and protect those at risk
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What steps may a physician take to prevent harm caused by a patients infectious disease?
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Physician may have a duty to warn public health officials (reportable diseases) and identify people at risk.
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What is the Tarasoff decision?
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A law requiring physician to directly inform and protect a potential victim from harm; may involve a breach of confidentiality.
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May a physician break confidentiality if in cases of an automobile accident?
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Only if they suspect that the driver was impaired
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How may a physician handle a suicidal or homicidal patient?
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The physician may hold the patient involuntarily for a period of time ... or until psychiatric evaluation is completed.
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A civil suit under negligence requires what 3 things?
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1. Physician breach of duty to patient (Dereliction) 2. patient suffers harm (damage) 3. Breach of duty causes harm (Direct)
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What is the most common factor leading to litigation between the physician and pt?
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poor communication.
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In a criminal suit the burden of proof is "beyond a reasonable doubt" ... in a malpractice suit the burden of proof is ...
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more likely than not
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Define Anosognia
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unaware that one is ill
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Define Autotopagnosia
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unable to locate ones own body parts
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Define depersonalization
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body seems unreal or dissociated
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What is involved in orienting the patient
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person, place, and time
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What is the order of orientation loss in a disoriented patient?
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time goes first, then place, and last person
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Define anterograde amnesia
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the inability to remember things that occred AFTER an CNS insult ... cannot make new memories
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Define retrograde amnesia
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inability to remember things that occured before a CNS insult
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What is Korsakoff's anmesia
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classic anterograde anmesia caused by a thymine deficiency.
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A alcoholic patient presents with anterograde amnesia, and confabulations. What is the likely diagnosis?
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Korsakoffs amnesia
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How many signs of maladaptive substance abuse must be present in a years time to diagnose substance dependance?
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3 or more.
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What is the difference between substance dependence and substance abuse?
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substance abuse is maladaptive patterns leading to clinical or social impairment or distress that have not met the criteria for substance dependence.
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What are Freud's three structures of the mind?
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Id, Ego, Superego
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Define the Id.
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Primal urges, sex and aggression.
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Define the Superego.
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Moral values and conscience
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Define the Ego.
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Mediator between unconscious mind and external world.
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The Topographic theory of the mind deals with what three topography?
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Conscious, precocious, and unconscious
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Define Conscious
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What you are aware of.
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Define precocious
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What you are able to make conscious with effort
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Define unconscious
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what you are not aware of.
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What is an Oedipus complex?
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repressed sexual feelings of a child for the opposite sex parent, accompanied by a rivalry with same sex parent.
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hallucinations, delusions, strange behavior, and loose associations are positive symptoms of what disorder?
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Schizophrenia.
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What are some negative symptoms of schizophrenia?
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flat affect, social withdrawal, thought blocking, lack of motivation
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How long must a patient experience symptoms of schizophrenia for a diagnosis?
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Periods of psychosis or disturbed behavior lasting > 6 months.
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What are the 5 types of schizophrenia?
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1. Disorganized 2. Catatonic 3. paranoid 4. Undifferentiated 5. Residual
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What are the 4 A's of schizophrenia described by Bleuler?
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1. Ambivalence 2. Autism 3. Affect (blunted) 4. Associations (loose)
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What is schizoaffective disorder?
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a combination of schizophrenia and a mood disorder.
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What is the lifetime prevalence of schizophrenia?
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1.5% (males=females, blacks=whites)
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Are genetic or environmental factors stronger in the etiology of schizophrenia
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Genetic factors outweigh environmental factors
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In one word, describe Clusters A, B, and C personality disorders.
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A = weird B = wild C = worried
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Describe a pt with a Cluster A personality disorder.
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odd or eccentric, cannot develop meaningful social relationships.
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What are 3 types of Cluster A personality disorders?
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1. Paranoid 2. Schizoid 3. Schizotypal
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What is a Paranoid personality disorder?
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distrust and suspiciousness, projection is main defense mechanism
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What is a Schizoid personality disorder?
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voluntary social withdrawal, limited emotional expression
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What is a Schizotypal personality disorder
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interpersonal awkwardness, odd thought patterns and appearance
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Personality disorders that lead pts to be erratic, emotional, or dramatic and have a genetic association with mood disorders
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Cluster B
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What are the 4 types of Cluster B personality disorders
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1. Antisocial 2. Borderline 3. Histrionic 4. Narcissistic
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Describe an antisocial personality disorder.
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disregard for and violation of rights of others, crimilatiy, males more often affected than females.
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Describe a borderline personality disorder
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unstable mood and behavior, impulsiveness, sense of emptiness. women more often affected than men.
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Describe a Histrionic personality disorder.
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excessive emotionality, somatization, attention seeking, sexually provacative.
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Describe a Narcissistic personality disorder.
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grandiosity, sense of entitlement, may demand ""top"" physician, or best health care
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Pts with personality disorders that leave them anxious or fearful and have a genetic association with anxiety disorders
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Cluster C personality disorders
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List 3 types of Cluster C personality disorders
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1. Avoidant 2. Obsessive-Compulsive 3. Dependent
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Describe an avoidant personality disorder.
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sensitive to rejection, socially inhibited, timid, feelings of inadequacy
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Describe OCD
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preoccupation with order, perfectionism, and control
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Describe a dependent personality disorder.
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submissive and clinging, excessive need to be taken care of, low self confidence
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What are Medicare and Medicaid?
|
federal health care programs that originated from amendments to the Social Security Act.
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Who does MedicarE provide for?
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The Elderly
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Who does MedicaiD provide for?
|
The Destitute. Medicaid is federal and state assistance for very poor people.
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Ethically, what do you do if your patient is non-compliant?
|
Work to improve the physician patient relationship.
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Ethically, what do you do if your patient has difficulty taking medication?
|
Provide written instructions, attempt to simplify the treatment regimen.
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What do you do if a 17 year old girl is pregnant and asks for an abortion.
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informthe patient that most states require parental consent for minors for an abortion.
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What do you do if a patient refuses a necessary procedure or desires and unnecessary one?
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attempt to understand why the patient wants/does not want the procedure. address underlying concerns. avoid performing unnecessary procedures.
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What do you do if a patient is angry about the amount of time he spent in the waiting room?
|
apologize for any inconvenience. stay away from efforts to try to explain the delay.
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what do you do if the patient is upset with the way he was treated by another doctor?
|
suggest that the patient speak directly to the physician regarding the concerns.
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What do you do if a child wishes to know more about his illness?
|
Ask what the parents have told the child about his illness. Parents of a child decide what information can be relayed about the illness.
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What do you do if a patient continues to smoke, believing that cigarettes are good for him?
|
Ask how the pt feels about his smoking. Offer advice on cessation if the patient seems willing to make an effort to quit.
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A child puts everything in their mouth. How old are they?
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1st year of life.
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An infant sits with support, how old is she?
|
4 months
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An infant stands with help, how old is he?
|
8 months
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A baby is crawling, how old is she?
|
9 months
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A little girl just learned to walk on her own, how old is she?
|
13 months
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A child has just learned to climb the stairs alone, how old is he?
|
18 months
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At what age does an emergence of hand preference first appear?
|
18 months
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A child has lots of energy, can walk backwards, turn doorknobs, unscrew jars, and scribble with crayons. How old is she?
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2 years
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A child can ride a tricycle, go up the stairs normally, draw recognizable figures and has just started toilet training. How old?
|
3 years.
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A child can descend the stairs normally and hop on one foot. How old is she?
|
4 years
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At what age will a child develop complete sphincter control (toilet trained)?
|
5 years
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At 5 years of age, what percentage of the adult brain mass does the child have?
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75.00%
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A child has most of her permanent teeth, how old is he?
|
11 years
|
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True or False: Boys and girls have roughly the same height to weight ratio between ages 6-12 years?
|
False: boys are heavier than girls.
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|
At what age does the adolescent growth spurt usually kick in?
|
Around 12 years, earlier for girls than for boys.
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A child plays patty cake and peek a boo, how old is she?
|
10 months
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|
A baby is experiencing stranger anxiety, how old is he?
|
6 months
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A baby has started showing signs of normal separation anxiety, how old is she?
|
1 year.
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The parent is the central figure and issues of trust are key, how old is the child?
|
1st year of life.
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A toddler will engage in parallel play, but ""no"" is still her favorite word, how old is she?
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1 year
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A toddler is selfish and self centered, aggressive, and tends to imitate mannerisms and activities, how old is he?
|
2 years
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A baby can follow objects to midline, how old is she?
|
4 months
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A baby is putting his feet in his mouth, how old is he?
|
5 months
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A baby will approach a toy with one hand, and then change hands with the toy, how old is she?
|
1st year of life
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A baby first laughs out loud, how old is she?
|
4 months
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A baby has started saying ""ma-ma-ma"" and ""da-da-da"", how old is he?
|
10 months
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|
In Piaget's Cognitive Development, at what age does a baby achieve object permanence?
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1 year
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A baby kicks and throws a ball, how old is he?
|
1 year
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A baby can stack three cubes, how old is she?
|
18 months.
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A toddler is using two word sentences and has a vocabulary of about 250 words, how old is he?
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1 year
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A toddler has started using pronouns and shows great variations in timing of language. How old is she?
|
2 years
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|
A toddler is using complete sentences and has a vocabulary of 900 words, although he appears to understand 4x as many.
|
3 years
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|
A child tells stories, uses prepositions, plurals, and has discovered compound sentences, how old is she?
|
4 years
|
|
A child can stand on her tiptoes, how old is she?
|
30 months
|
|
A child is able to aim and throw a ball and stack 6 cubes, how old is he?
|
2 years
|
|
A child who can use symbols and has concrete use of objects and use of symbols along with a strong egocentrism?
|
2 years
|
|
At what age is gender identity fixed?
|
3 years
|
|
A child knows her full name and what sex she is, how old is she?
|
3 years
|
|
Two children are observed to be taking turns with a toy, how old are they?
|
3 years
|
|
At what age is a child likely to start grooming themselves and brushing their own teeth?
|
4 years
|
|
A toddler can catch a ball, stack 9 cubes, cut paper with scissors and keeps unbottoning his shirt buttons, how old is he?
|
3 years
|
|
A child can point to and count three objects, repeat four digits, and name colors correctly, how old is she?
|
4 years
|
|
A child has an imaginary friend and this is entirely normal for this age group, how old is she?
|
4 years
|
|
Two children are caught "playing doctor", at what age does this curiosity manifest?
|
4 years
|
|
A child is having terrible nightmares and needs the light left on at night for fear of monsters, how old is he?
|
4 years
|
|
At what age does a child adopt personal speech patterns?
|
adolescence (12+)
|
|
At what age does communication become the focus of friendships?
|
adolescence (12+)
|
|
A child repeatedly asks for the meaning of words, how old is she?
|
5 years
|
|
A child can count 10 objects correctly, how old is she?
|
5 years
|
|
At what age will a child first express romantic feelings towards others, perhaps as an Oedipal phase?
|
5 years
|
|
A child can draw a recognizable man, dress and undress herself, and catch a ball with two hands, how old is she?
|
5 years
|
|
A child can ride a bicycle, print letters, and her father is excited because she is gaining athletic skill and coordination.
|
6-12 years
|
|
By age 12, about how many words will a child have in their vocabulary?
|
About 50,000
|
|
A child shows a shift from egocentric to social speech and incomplete sentences decline, how old is he?
|
6-12 years
|
|
Identity is the critical issue in what age range?
|
adolescence (12+)
|
|
Conformity is most important for what age range?
|
11-12 years
|
|
When do cross gender relationships first take off?
|
adolescence (12+)
|
|
A teacher has noticed many of her kids are quitting organized sports, how old is her class likely to be?
|
adolescents (12+)
|
|
A teacher has noticed that for her kids, the ""rules of the game"" are paramount. How old is her class?
|
6-12 years
|
|
At what age range are organized sports first possible?
|
6-12 years
|
|
Demonstrating competence is key for what age group?
|
6-12 years
|
|
At this age there is a separation of the sexes and sexual feelings are not apparent.
|
6-12 years
|
|
At this age there is an adherence to logic, concrete operations, and no hypotheticals.
|
6-12 years
|
|
Children of this age group can use seriation, and have a personal sense of right and wrong.
|
6-12 years
|
|
Children can handle hypotheticals, being systematic problem solving and deal with the past, present, and future. Age?
|
adolescence (12+)
|
|
APGAR stands for what?
|
Appearance (color); Pulse; Grimace; Activity; Respiration
|
|
How do you calculate an APGAR score?
|
Score 0-2 at 1 and 5 inutes in each of 5 categories.
|
|
What the three levels of appearance (color) on the APGAR scale?
|
0 = blue/pale 1=trunk pink 2=all pink
|
|
What describes the three levels of pulse on the APGAR score?
|
0= 0 1= <100 2= >100
|
|
What describes the three levels of reflex irritability (grimace) on the APGAR scale?
|
0= none 1= grimace 2 = grimace + cough
|
|
Describe the 3 levels of muscle tone on the apgar scale.
|
0 = limp 1 = some 2 = active
|
|
Describe the three levels of respiratory effort on the APGAR scale.
|
0 = none 1= irregular 2 = regular
|
|
What is the definition of low birth weight in grams?
|
< 2500 g
|
|
List some complications of low birth weight.
|
infections; respiratory distress syndrome; necrotizing enterocolitis; intraventricular hemorrhage; persistent fetal circulation
|
|
What are two likely etiologies for low birth weight?
|
prematurity and intrauterine growth retardation
|
|
True or False: Low birth weight is associated with a greater RR of physical and emotional problems.
|
TRUE
|
|
Long term infant deprivation of affection results in the 4 W's ...
|
Weak, Wordless, Wanting, Wary
|
|
How long does deprivation of affection need to continue before changes may be irreversible?
|
> 6 months
|
|
List some effects of long term deprivation of affection in infants.
|
1. Decreased muscle tone 2. Poor language skills 3. Poor socialization skills 4. Lack of basic trust 5. Anaclitic depression 6. Weight loss 7. Physical illness
|
|
What is anaclitic depression?
|
Depression in an infant owing to continued separation from caregiver - it can result in failure to thrive.
|
|
An infant becomes withdrawn and unresponsive when left in a crowded daycare for a few weeks, what is the problem?
|
Anaclitic depression
|
|
What stimuli may cause children to regress to younger behavior?
|
Stress: physical illness, birth of a new sibling, tiredness.
|
|
How many children die each year in the United States from physical abuse?
|
about 3000.
|
|
At what age are most children sexually abused?
|
9-12 years.
|
|
Describe autistic disorder
|
pts have severe communication problems and difficulty forming relationships. repetative behavior, savants, and below normal intelligence.
|
|
Describe Asperger syndrome
|
Milder form of autism involving problems with social relationships and repetative behavior. Children are of normal intelligence and lack social deficits.
|
|
Describe Rett disorder
|
X-linked disorder seen only in girls. Characterized by loss of development and mental retardation appearing at about 4 years.
|
|
Describe ADHD
|
limited attention span and hyperactivity. children are emotionally labile, impulsive, and prone to accidents. Normal intelligence
|
|
Why aren't boys seen with Rett syndrome?
|
With this X-linked disorder, boys die in utero.
|
|
What is the treatment for ADHD?
|
methylphenidate (Ritalin)
|
|
Describe conduct disorder
|
continued behavior violating social norms.
|
|
Describe oppositional definant disorder.
|
A form of conduct disorder when the child is noncompliant in the absence of criminality.
|
|
Describe Tourette's syndrome.
|
motor/vocal tics and involuntary profanity. Onsent < 18 years.
|
|
What is the treatment for Tourette's?
|
haloperidol
|
|
Describe separation anxiety disorder.
|
fear of loss of attachment figure leading to factitious physical complaints to avoid going to school. Common in children ages 7-8.
|
|
Describe Anorexia nervosa.
|
abnormal eating habits, body image distortion, and increased excercise.
|
|
Severe weight loss, amennorrhea, anemia and electrolyte disturbances in an adolescent girl are signs of ...
|
anorexia nervosa.
|
|
Describe Bulimia nervosa.
|
binge eating followed by self-induced vomiting or use of laxitives. Body weight is usually normal.
|
|
Parotitis, tooth enamel erosion, increase amylase, and esophageal varicies in an adolescent girl at normal weight
|
Bulimia nervosa.
|
|
What are hallucinations?
|
perceptions in the absence of external stimuli.
|
|
What are Illusions?
|
misinterpretations of actual external stimuli.
|
|
What are Delusions?
|
false beliefs not shared with other members of culture/subculture that are firmly maintained despite obvious proof to the contrary.
|
|
Describe the difference between a delusion and a loose association.
|
A delusion is a disorder in the content of thought (the actual idea), while a loose association is a disorder in the form of the thought
|
|
Patients with schizophrenia commonly experience what kind of hallucinations?
|
Visual and auditory hallucinations.
|
|
Patients with psychomotor epilepsy will commonly experience what kind of hallucination?
|
olfactory hallucination.
|
|
True or False: Gustatory hallucination is rare.
|
TRUE
|
|
Patients with DTs or cocaine abusers may experience what kind of hallucinations?
|
tactile hallucinations
|
|
What is a hypnagogic hallucination?
|
A hallucination that occurs when going to sleep.
|
|
What is a hypnopompic hallucination?
|
A hallucination that occurs when waking from sleep.
|
|
How many heroin addicts are there in the United States?
|
About 500,000
|
|
A diagnosis of hepatitis, abscesses, overdose, hemorrhoids, AIDS, or right sided endocarditis. Consider?
|
heroin addiction.
|
|
What two drugs are used to treat heroin addicts?
|
Naloxone and Methadone.
|
|
How can Naloxone help a heroin addict?
|
Naloxone (Narcan) and naltrexone competitively inhibit opiods.
|
|
How can Methadone help a heroin addict?
|
Methadone is a long acting oral opiate used for heroin detoxification and long term maintenance.
|
|
What is Delirium tremens?
|
Life threatening alcohol withdrawal syndrome that peaks 2-5 days after the last drink.
|
|
tachycardia, tremors, and anxiety followed by hallucinations, delusions, and confusion in an alcoholic may be signs of?
|
delirium tremens.
|
|
What is the treatment for delirium tremens?
|
benzodiazepines.
|
|
List risk factors for suicide completion
|
SAD PERSONS"": Sex (male), Age, Depression, Previous attempt, Ethanol, RAtional thought, Sickness, Organized plan, No spouse, Social support lacking.
|
|
What is a personality trait?
|
Pattern of perceiving, relating to, and thinking about the environment and oneself that is exhibited in a wide range of important social and personal contexts.
|
|
What is a personality disorder?
|
When personality traits become inflexible and maladaptive, causing impariment in social or occupational functioning or subjective distress
|
|
What does the phrase ""Mature women wear a SASH"" indicate
|
Mature ego defenses: Sublimation, Altruism, Supression, and Humor
|
|
What are ego defenses?
|
automatic and UNCONCIOUS reactions to psychological stress.
|
|
Describe altruism as an ego defense.
|
guilty feelings alleviated by unsolicited generosity toward others.
|
|
Describe humor as an ego defense.
|
appreciating the amusing nature of an anxiety provoking or adverse situation.
|
|
a mafia boss making a large donation to charity is an example of what ego defense?
|
altruism.
|
|
a cancer patient laughing about their condition is an example of what ego defense?
|
humor
|
|
aggressive impulses used to succeed in sports is an example of what ego defense?
|
sublimation.
|
|
What is sublimation as an ego defense?
|
process whereby one replaces an unacceptable wish with a course of action that is similar to the wish but does not conflict with one's value system.
|
|
describe suppression as an ego defense.
|
VOLUNTARY withholding of an idea or feeling from concious awareness.
|
|
choosing not to think about your taxes until april 13th is an example of what ego defense?
|
suppression.
|
|
A patient with libidinous thoughts enters a monastery This is an example of what ego defense?
|
Reaction formation.
|
|
An 8 year old child under stress begins bed wetting again. This is an example of what ego defense?
|
Regression.
|
|
What is the basic underlying mechanism for all ego defenses?
|
repression.
|
|
a patient says that one dr is a miracle worker, but another is totally incompetent. this is an example of what ego defense?
|
splitting.
|
|
What is dysthymia?
|
A milder form of depression lasting at least 2 years.
|
|
Describe a major depressive episode.
|
at least 5 for 2 weeks. sleep changes, loss of interest, guilt, less energy, less concentration, change in appetite, psychomotor retardation, suicidal, depressed
|
|
A major depressive episode MUST include one of two symptoms, these are ...
|
1. depressed mood, or 2. anhedonia
|
|
A patients has experienced 2 major depressive episodes with a symptom free interval of 2 months, what is the diagnosis?
|
Recurrent Major Depressive Disorder.
|
|
What is the lifetime prevalence of major depressive disorder in women? in men?
|
10-25% in women and 5-12% in men.
|
|
What is indicated by ""SIG E CAPS""?
|
Symptoms of major depression: Sleep, Interest, Guilt, Energy, Concentration, Appetite, Psychomotor, Suicidal.
|
|
What is the key to diagnosing dementia?
|
Ruling out delirium.
|
|
In an elderly person who seems to apparently have dementia, what other condition should be considered?
|
Depression.
|
|
Describe the difference between dementia and delirium.
|
Delirium= changes in sensorium while Dementia = changes in memory. Dementia is commonly irreversible.
|
|
What is the most common psychiatric illness on medical and surgical floors?
|
Delirium.
|
|
If a patient on a hospital ward presents with delirium, what drugs should you check for in their med list?
|
Drugs with anticholinergic effects.
|
|
Pt presents with dec attention span and dec level of arousal, disorganized thinking, hallucinations, illusions
|
Delirium
|
|
What is the key to diagnosis of delirium?
|
Waxing and waning level of conciousness, develops rapidly.
|
|
A man who has lost his wife appears to be in shock, and expresses denial, guilt and somatic symptoms for the 4 months.
|
Normal bereavement.
|
|
How long does normal bereavement last?
|
Typically 6 months to a year.
|
|
When does grief become pathologic?
|
When it becomes excessively intense or prolonged, delayed, inhibited, or denied.
|
|
What are the functions of the frontal lobe?
|
concentration; orientation; language; abstraction; judgement; motor regulation; mood
|
|
What deficit is most notable in frontal lobe lesions?
|
lack of social judgement.
|
|
How is REM sleep like sex?
|
increase pulse, penile/clitoral tumescence, decreases with age.
|
|
how often does REM sleep occur while sleeping?
|
every 90 minutes. Duration of REM sleep increases throughout the night.
|
|
What is the principal neurotransmitter involved in REM sleep?
|
ACh.
|
|
What are the neurotransmitter changes associated with anxiety?
|
increase in NE decrease in GABA and 5HT
|
|
What neurotransmitter changes are associated with Depression?
|
decrease NE and 5HT
|
|
What neurotransmitter changes are associated with Alzheimer's dementia?
|
decreases ACh
|
|
What neurotransmitter changes are associated with Huntington's Disease?
|
decrease GABA and ACh
|
|
What neurotransmitter changes are associated with Schizophrenia?
|
increase DA
|
|
What neurotransmitter changes are associated with Parkinson's disease?
|
decrease in DA.
|
|
Name the 4 reflexes that are present at birth.
|
1. Mono 2. Rooting 3. Palmar 4. Babinski
|
|
What is the Mono reflex?
|
extension of limbs when startled
|
|
What is the rooting reflex?
|
nipple seeking
|
|
What are the Kubler-Ross dying stages?
|
1. Denial 2. Anger 3. Bargaining 4. Grieving 5. Acceptance
|
|
True or False: Kubler Ross stages of dying always occur sequentially?
|
False: more than one stage may be present at a time and they may not proceed in order.
|
|
Describe ""substance abuse""
|
Maladaptive pattern leading to clinically significant impairment or distress - 1 or more symptom must be present for 1 year
|
|
What are the symptoms of substance abuse?
|
1. recurrent use = failure to fulfill major obligation 2. recurrent use in physically hazardous situation 3. recurrent use related legal problems
|
|
What is substance dependence?
|
Maladaptive pattern of substance use defined as 3 or more of the defining symptoms for at least a year.
|
|
What are the symptoms of substance dependence?
|
Tolerance, Withdrawal, Taken in larger amounts, Desire to cut down, Lots of energy spent obtaining substance, Activities reduced, Use despite problems
|
|
Describe adjustment disorder.
|
emotional symptoms causing impairment following an identifiable psychosocial stressor lasting < 6 months.
|
|
Describe generalized anxiety disorder.
|
uncontrollable anxiety unrelated to a specific person, situation, or event. May include GI symptoms, fatigue, and difficulty concentrating.
|
|
Describe post traumatic stress disorder.
|
intense fear, helplessness, or horror, in which a person who experienced or witnessed an event that involved actual or threatened death or injury
|
|
What is the difference between acute stress and PTSD?
|
acute stress lasts 2-4 weeks, PTSD lasts > 1 month and causes distress or social/occupational impairment.
|
|
What is Gamophobia?
|
fear of marriage.
|
|
What is algophobia?
|
fear of pain.
|
|
what is acrophobia?
|
fear of heights.
|
|
What is agoraphobia?
|
fear of open places.
|
|
What is a specific phobia?
|
fear that is excessive or unreasonable, cued by presence or anticipation of a specific object or entity.
|
|
Does a person with a specific phobia recognize that their fear is excessive?
|
Yes.
|
|
What are treatment options for specific phobias?
|
systematic desensitization, flooding.
|
|
In reference to a somatoform disorder, describe a primary gain.
|
Primary gain = what symptom does for patients internal psyche.
|
|
In reference to a somatoform disorder, describe a secondary gain.
|
Secondary gain = what symptom gets for patient (ie sympathy)
|
|
In reference to a somatoform disorder, describe a tertiary gain.
|
Tertiary gain = what the caretaker gets (MD on an interesting case)
|
|
What does "PANIC" indicate.
|
The symptoms of a panic attack: palpiations, abdominal distress, nausea, increased perspiration, chest pain, chills, choking.
|
|
What is panic disorder?
|
discrete period of intense fear and discomfort, peaking in 10 minutes, including 4 symptoms, and must be diagnosed in the context of the occurence.
|
|
Does sexual interest decline in the elderly?
|
No, sexual interest does not decline.
|
|
What sexual changes to elderly men experience?
|
slower erection/ejaculation, longer refractory period
|
|
What sexual changes do elderly women experience?
|
vaginal shortening, thinning, dryness.
|
|
Describe changes in sleep patterns with advanced age.
|
decrease REM sleep, slow wave sleep; increase sleep latency, wakings during the night.
|
|
What are the most common medical conditions due to advanced age?
|
arthritis, HTN, CVD.
|
|
True or False: Depression is more prevalent in the elderly?
|
True: depression is more prevalent and the suicide rate is increased.
|
|
What percent of time is spent in stage 1 sleep?
|
5.00%
|
|
What percent of time is spent in stage 2 sleep?
|
45.00%
|
|
What percent of time is spent in stage 3-4 sleep?
|
25.00%
|
|
What percent of time is spent in REM sleep?
|
25.00%
|
|
When do you experience a Beta waveform?
|
When awake, alert, active mental concentration with your eyes open.
|
|
When do you experience an alpha waveform?
|
awake, but drowsy with eyes closed.
|
|
In light sleep, what waveform predominates?
|
theta
|
|
in deeper sleep, stage 2, what waveform predominates?
|
Sleep spindles and K complexes.
|
|
In stage 3-4 sleep, the deepest non REM sleep, what waveforms predominate?
|
delta waves (lowest frequency, highest amplitude)
|
|
When will a person sleepwalk, have night terrors, or wet the bed?
|
In delta sleep (stage 3-4)
|
|
What waveform predominates in REM sleep?
|
Beta waves (the same as being awake)
|
|
when does dreaming occur?
|
in REM sleep
|
|
Describe REM sleep.
|
dreaming, loss of motor tone, possibly a memory processing function, erections, increased brain oxygen consumption.
|
|
What does ""At night, BATS Drink Blood"" indicate
|
waveforms of sleepstages: Beta, Alpha, Theta, Spindles and K forms, Delta, Beta.
|
|
What is the key to initiating sleep?
|
5HT predominance of raphe nucleus
|
|
What neurotransmitter reduces REM sleep?
|
NE
|
|
What are EOM movements during REM sleep due to?
|
activity of the PPRF (paramedian pontine reticular formation / conjugate gaze center)
|
|
What do the terms ""paradoxical sleep"" and ""desynchronized sleep"" apply to
|
REM sleep having the same EEG pattern as awake and alert
|
|
Why are benzodiazepines good for night terrors and sleep walking?
|
They shorten stage 4 sleep.
|
|
What drug shortens stage 4 sleep and is used to treat enuresis?
|
Imipramine.
|
|
What is a conversion disorder?
|
A somatoform disorder where symptoms suggest motor or sensory neurologic or physical disorder - but tests and physical examination are negative.
|
|
What is somatoform pain disorder?
|
prolonged pain that is not explained completely by illness.
|
|
What is hypochondriasis?
|
misinterpretation of normal physical findings, leading to preoccupation with fear of having a serious illness in spite of medical reassurance.
|
|
what is somatization disorder?
|
variety of complaints in multiple organ systems.
|
|
what is body dysmorphic disorder?
|
patient convinced that part of their own anatomy is malformed.
|
|
what is pseudocyesis?
|
a false belief of being pregnant associated with objective physical signs of pregnancy.
|
|
What is electroconvulsive therapy?
|
a painless procedure that results in a seizure. Complications can result from anesthesia.
|
|
What are the major adverse effects of ECT?
|
disorientation, and amnesia.
|
|
When is ECT used?
|
For major depressive disorder refractory to all other treatment.
|
|
What is a hypomanic episode?
|
like a manic episode, except the mood disturbance is not as severe. it does not require hospitalization and there are no psychotic features.
|
|
What is malingering?
|
patient consciously fakes or claims to have a disorder in order to attain a specific gain.
|
|
What is factitious disorder?
|
a patient consciously creates symptoms in order to assume the ""sick"" roll to get medical attention.
|
|
What is Munchausen's syndrome?
|
manifests as a chronic history of multiple hosptital admissions and willingness to receive invasive procedures.
|
|
What is Munchausen's syndrome by proxy?
|
when the illness in a child is caused by a parent. the motivation is unconcious.
|
|
Describe bipolar disorder.
|
6 separate criteria sets exist for bipolar disorders with combinations of manic, hypomanic, and depressed episodes.
|
|
What is the treatment of choice for bipolar disorder?
|
Lithium.
|
|
What is cyclothymic disorder
|
a milder form of bipolar disorder lasting at least 2 years.
|
|
What is a manic episode?
|
distinct period of abnormally and persistently elevated, expansive, or irritable mood lasting at least one week.
|
|
During a manic episode, 3 or more symptoms are present ... list the 7 symptoms.
|
1. distractability 2. insomnia 3. grandiosity 4. flight of ideas 5. increase in activity/agitation 6. pressured speech 7. thoughtlessness
|
|
Disinhibition, emotional lability, slurred speech, ataxia, coma, and blackouts are indicative of what substance?
|
alcohol.
|
|
what symptoms may a patient withdrawing from alcohol experience?
|
tremor, tachycardia, HTN, malaise, nausea, seizures, DTs, tremulousness, agitation, hallucinations.
|
|
When a patient stops smoking cigarettes, what symptoms might they expect during withdrawal?
|
irritability, headache, anxiety, weight gain, and cravings.
|
|
a patient who consumes lots of coffee might experience what symptoms?
|
restlessness, insomnia, increased diruesis, muscle twitching, cardiac arrhythmias
|
|
When a patient stops caffeine consumption, what symptoms might they expect?
|
headache, lethargy, depression, weight gain.
|
|
A patient presents to the ER with nausea and vomiting, constipation, and pinpoint pupils. What substance?
|
opiods.
|
|
When a patient ODs on opiods, what symptom are you most concerned with?
|
seizures ... may be life threatening.
|
|
a pt presents with amnesia, ataxia, somnolence, and minor respiratory distress. No alcohol. what substance?
|
Benzodiazepines.
|
|
Are benzos addictive?
|
if consumed with alcohol.
|
|
When a patient stops taking benzos, what symptoms may they experience?
|
rebound anxiety, seizures, tremor, and insomnia
|
|
a patient presents to the ER with major respiratory depression, their friends state they "took something"
|
barbiturates
|
|
In addition to anxiety, seizures, and delirium, You are concerned about in a patient who is withdrawing from barbiturates?
|
life threatening cardiovascular collapse.
|
|
a patient presents with euphoria, anxiety, paranoid delusions, impaired judgement, and the munchies ?
|
marijuana.
|
|
Are there withdrawal symptoms from marijuana?
|
social withdrawal.
|
|
a patient presents with marked anxiety, delusions, visual hallucinations, flashbacks, and pupil dilation.
|
LSD.
|
|
a pt presents with agitation, pupillary dilation, tachycardia, euphoria, fever, hallucinations and awake for 36 hr
|
amphetamines.
|
|
what symptoms can a patient withdrawing from amphetamines expect?
|
post crash depression, lethargy, headache, stomach cramps, hunger, hypersomnolence.
|
|
a pt presents euphoric with psychomotor agitation, tachycardia, pupillary dilation, hallucinations, and angina..
|
cocain.
|
|
what fatal effect of cocain are you worried about?
|
sudden cardiac death.
|
|
what can a patient in withdrawal from cocain expect to experience?
|
post crash depression and suicidality, hypersomnolence, fatigue, malaise, and severe psychological craving.
|
|
a pt presents with fever and psychomotor agitation, belligerent and impulsive, and has horizontal and vertical nystagmus.
|
PCP.
|
|
When a patient is withdrawing from PCP, what symptoms are you concerned about?
|
sudden onset of severe, random, homicidal thought
|
|
A patient recovering from a PCP intoxication appears to be having a recurrence of intoxication symptoms... why?
|
reabsorption of PCP from the GI tract.
|
|
What is the BMI numerical cutoff for an obesity?
|
> 30.0
|
|
A patient complains of sexual dysfunction, what 3 things are on your differential?
|
1. drugs 2. disease 3. psychological
|
|
What diseases may lead to sexual dysfunction?
|
depression or DM
|
|
What drugs can lead to sexual dysfunction?
|
anti-HTN, neuroleptics, SSRI, EtOH.
|
|
Describe the physiological effects of stress.
|
Stress induces production of FFA, 17-OH corticosteroids, and catecholamines. it affects water absorption, muscular tonicity, and gastrocolic reflex
|
|
A patient with depression will typically show these three changes in their sleep stages:
|
1. decrease slow wave sleep 2. decrease REM latency 3. early morning awakening
|
|
What is the most important screening question for depression?
|
Are you experiencing early morning awakening?
|
|
Describe narcolepsy.
|
person falls asleep suddenly. May include hypnagogic or hypnopompic hallucinations.
|
|
A person with narcolepsy starts off their sleep cycle with what sleep stage?
|
REM
|
|
What is cataplexy?
|
sudden collapse while awake. may be present in some patients with narcolepsy.
|
|
What is the treatment for narcolepsy?
|
amphetamines.
|
|
What is the treatment for sleep apnea?
|
weight loss, CPAP, surgery
|
|
Describe the difference between central and obstructive sleep apnea.
|
Central sleep apnea involves no respiratory effort, obstructive sleep apnea involves respiratory effort against an airway obstruction.
|
|
What symptoms and signs is sleep apnea associated with:
|
obesity, loud snoring, systemic or pulmonary HTN, arrhythmias, and possibly sudden death.
|
|
What toxin inhibits lipoic acid?
|
Arsenic
|
|
What are the net reactants and products in the reaction that Pyruvate Dehydrogenase catalyzes?
|
Reactants:1. Pyruvate 2. CoA 3. NAD Products:1. Acetyl CoA 2. CO2 3. NADH
|
|
Pyruvate dehydrogenase deficiency: Congenital or Acquired
|
Both. Acquired cases happen in cases of B1 deficiency (such as in alcoholics.)
|
|
What is the rate-limiting step of the TCA?
|
Isocitrate to alpha-ketoglutarate by isocitrate dehydrogenase
|
|
Which tissues and organs primarily convert pyruvate into lactate?
|
1. RBCs and WBCs 2. Lens and cornea 3. Renal medulla 4. Testes
|
|
What stimulates and inhibits isocitrate dehydrogenase?
|
Stimulate: ADP; Inhibit: 1. ATP 2. NADH
|
|
Which reagent sequentially removes C-terminal residues from a polypeptide?
|
Carboxypeptidase
|
|
Where in the cell does the following occur: Fatty acid oxidation (beta-oxidation)
|
Mitochondria
|
|
What activated carriers carry: 1-carbon units
|
1. Tetrahydrofolates (originally as formyl then methyl) 2. Biotin (as CO2) 3. S-adenosyl-methionine (as CH3)
|
|
What is the mechanism of oligomycin?
|
ATPase inhibition
|
|
Cathode: What does it attract?
|
Cations
|
|
What kind of inheritance and mutation is the alpha-1-antitrypsin deficiency?
|
Autosomal recessive, single purine substitution (GAG to AAG)
|
|
What is this molecule an activated carrier of?: S-adenosyl-methionine
|
Methyl groups
|
|
What is the mechanism of electron transport inhibitors?
|
1. Directly inhibit electron transport causing: 2. Decreased protein gradient and decrease in O2 consumption, thereby: 3. Blocking ATP synthesis
|
|
What stimulates and inhibits alpha-ketoglutarate dehydrogenase?
|
Stimulate: Nothing; Inhibit: 1. ATP 2. NADH 3. Succinyl CoA
|
|
Pyruvate dehydrogenase: What inhibits it?
|
NADH (You produce NADH, soon there'll be more of me.), Acetyl-CoA (Enough of me, save your pyrvuate.)
|
|
Where does the Cori Cycle happen?
|
In the liver and muscle/RBCs Liver: Pyruvate converts to glucose Muscle/RBCs: Glucose converts to Pyruvate
|
|
What is rotenone?
|
An electron transport inhibitor.
|
|
What enzymes and cofactors are used in conversion of pyruvate to alanine?
|
Enzyme: Alanine Transaminase (ALT) Cofactors: None
|
|
What is the rate-limiting enzyme in the Pentose phosphate pathway?
|
Glucose-6-Phosphate Dehydrogenase
|
|
Where in the electron transport chain is O2 reduced to 2H2O?
|
Complex IV
|
|
Pyruvate dehydrogenase deficiency: Treatment
|
Increased intake of ketogenic nutrients (such as high fat content or increased lysine and leucine)
|
|
What stimulates and inhibits citrate synthase?
|
Stimulate: Nothing; Inhibit: ATP
|
|
What is the enzyme involved in processing tRNA
|
Aminoacyl tRNA synthetase (uses 1 ATP)
|
|
What is the purpose of the Cori cycle?
|
Transfers excess reducing equivalents from RBCs and the muscle to liver so they can function anaerobically
|
|
Lipoamide or lipoate: Which is a cofactor for pyruvate dehydrogenase?
|
Lipoate (Lipoic acid)
|
|
What is antimycin A?
|
An electron transport inhibitor.
|
|
Name three classes of oxidative phosphorylation poisons.
|
1. Electron transport inhibitors 2. ATPase inhibitors 3. Uncoupling agents
|
|
What enzymes and cofactors are used in conversion of pyruvate to oxaloacetate?
|
Enzyme: Pyruvate Carboxylase (contains biotin and magnesium) Cofactors: CO2 and ATP
|
|
# of Aas in one turn of alpha-helix?
|
3.6
|
|
What disease state is glycolytic enzyme deficiency generally associated with?
|
Hemolytic anemia
|
|
What stimulates pyruvate dehydrogenase?
|
ADP (need more ATP. Inhibits PD kinase and stimulates PD phosphatase.)
|
|
Energy malnutrition leads to what disease?
|
Marasmus (as opposed to Kwashiorkor from protein malnutrition)
|
|
Which major metabolic reactions require Thiamine as a cofactor?
|
TCA: Pyruvate dehydrogenase and alpha-ketoglutarate dehydrogenase, HMP shunt: Transketolase
|
|
Why is FAD used to oxidize succinate?
|
Succinate is not powerful enough to reduce NAD.
|
|
Role of ATP in protein synthesis
|
ATP does tRNA Activation (charging)
|
|
Why is fructose metabolism faster than glucose metabolism?
|
Bypasses PFK, major regulatory step of glycolysis.
|
|
Where is fructokinase found?
|
Liver (processes most dietary fructose), kidney, small intestine
|
|
Amino acids that disrupt alpha-helix?
|
proline, many charged aas, bulky side chains
|
|
Where in glycolysis and TCA does CO2 come off?
|
3 places: Pyruvate to Acetyl CoA, Isocitrate to alpha-ketoglutarate, and alpha-ketoglutarate to Succinyl CoA
|
|
|
Separates the two strands of DNA into single strands allowing for replication to occur.
|
|
What enzyme converts Galactose-1-Phosphate to Glucose-1-Phosphate?
|
Uridyl transferase
|
|
What is the clinical presentation of fructose intolerance?
|
hypoglycemia, jaundice, cirrhosis, and vomiting
|
|
What is the etiology of classic galactosemia?
|
1. Absence of galactose-1-phosphate uridyl transferase 2. Build up of toxic substances including galactitol
|
|
I-Cell disease: Pathophysiology
|
Inability of cell to phosphorylate mannose residues on glycoproteins indicating that they are lysosome bound.
|
|
Sources of Succinyl CoA?
|
TCA intermediate, and from odd chained fatty acids, and from propionyl coA from metabolism of branched-chain amino acids.
|
|
What is the clinical presentation of essential fructosuria?
|
Fructose appears in the blood and urine
|
|
What is the treatment for fructose intolerance?
|
Decreased intake of both fructose and sucrose.
|
|
What does sorbitol dehydrogenase do?
|
Oxidizes sorbitol to fructose.
|
|
Which post-translational modification involves hydroxylation?
|
post-translational covalent alteration
|
|
Hunter's Syndrome vs Hurler's Syndrome: Mental retardation?
|
Both (Hunter's ranges from mild to severe)
|
|
An acid with a pKa of x serves as a buffer best at x + what?
|
positive or negative 1 (equal amounts of charged and uncharged acid)
|
|
Which tissues have cotransport of glucose?
|
Epithelial cells of the intestine, renal tubular cells, and choroid plexus
|
|
Heparin: Where found?/Distinguishing characteristic from other GAGs
|
Intracellular compound (unlike other GAGs). Found in mast cells of artery walls, especially in lungs, liver, and skin
|
|
Which reagent sequentially removes N-terminal residues from a polypeptide?
|
Phenylisothiocyanate (Edman degradation)
|
|
Where do GLUT1 receptors predominate over other GLUT receptors?
|
RBCs
|
|
Name the enzymes used in the oxygen-dependent respiratory burst.
|
1. NADPH oxidase 2. Superoxide dismutase 3. Myeloperoxidase 4. Catalase/Glutathione peroxidase 5. Glutathione reductase 6. G-6-P D
|
|
Where is pyruvate carboxylase found and not found?
|
Found in mitochondria of liver and kidney cells, not foudn in mitochondria of muscle
|
|
What does aldose reductase do?
|
Reduces glucose to sorbitol
|
|
Where is the mutation for G6PD?
|
Point mutation in coding region of the G6PD gene (X-linked)
|
|
What is the famed respiratory burst?
|
The rapid conversion of O2 to superoxide using NADPH.
|
|
Where is aldose reductase found?
|
Lens, retina, Schwann cells, kidney, placenta, RBCs, and gonads
|
|
Chondroitin Sulfate: Use/Mechanism
|
Form proteoglycan aggregates. Cartilage: Bind collagen and hold fibers in a tight, strong network
|
|
Kwashiorkor: Clinical presentation
|
Kwashiorkor results from protein-deficient MEALS. Malabsorbtion, Edema, Anemia, Liver (fatty change), Skin lesions
|
|
Pepsin cleaves peptides at which side of what residues?
|
C-terminal side of tyrosine, phenylalanine, and tryptophan (all have phenyl groups, these are the same bonds as chymotrypsin.
|
|
What is a glycoside?
|
Carbohydrate attached to non-carbohydrate structures.
|
|
What does it mean for genetic code to be degenerate?
|
More than one codon may code for the same amino acid.
|
|
Hyaluronic Acid: Use/Mechanism
|
Lubricant and shock absorber
|
|
What are the key enzymes of the pentose phosphate shunt and are the reactions reversible or irreversible?
|
1. Glucose-6-phosphate dehydrogenase (irreversible) 2. Transketolase (reversible)
|
|
What is this molecule an activated carrier of?: ATP
|
Phosphoryls
|
|
How does glucagon stimulate gluconeogenesis?
|
Regulation of F2,6-BP and inactivation of Pyruvate Kinase via elevation of cAMP-dependent protein kinase A.
|
|
Which amino acid is coded by only one codon?
|
Methionine
|
|
Hunter's Syndrome vs Hurler's Syndrome: Enzyme deficiency
|
Hunter's: Iduronate sulfatase, Hurler's: alpha-L-iduronidase
|
|
Trypsin cleaves peptides at which side of what residues?
|
C-terminal of lysine or arginine (the most basic amino acids)
|
|
What is the mechanism of 2,4-dinitrophenol?
|
Uncoupling agent
|
|
What enzyme phosphorylates glucose with high affinity?
|
Hexokinase
|
|
What is NADPH used for?
|
1. Reductive biosynthesis 2. Reduction of oxygen directly and hydrogen peroxide indirectly 3. Cytochrome P-450 mono-oxygenase system
|
|
What disease results from NADPH oxidase deficiency?
|
Chronic Granulomatous Disease
|
|
How does galactokinase deficiency present?
|
1. Galactosemia 2. Galactosuria More severe symptoms such as cataracts, hepatosplenomegaly and mental retardation can follow.
|
|
Phosphofructokinase-1: What does it do?
|
PFK-1 1-phosphorylates fructose-6-phosphate to produce Fructose-1,6-Bisphosphate.
|
|
Heparan Sulfate: Where found?/Distinguishing characteristic from other GAGs
|
Extracellular, unlike heparin. Found in basement membrane and as a ubiquitous component of cell surfaces.
|
|
Glucokinase: Where is it found and why does it do what it does?
|
Found in the liver and pancreatic beta cells. Phosphorylates glucose to sequester it after a big meal.
|
|
What are the two most common glycolytic enzyme deficiencies?
|
Pyruvate kinase (95% of cases) followed by glucose phosphate isomerase (4% of cases)
|
|
Dermatan Sulfate: Where found?/Distinguishing characteristic from other GAGs
|
Found in skin, blood vessels, and heart valves
|
|
In nucleic acids, what kind of substitution is a transversion?
|
TransVersion = conVersion between types (Purine for pyrimidine or vice versa)
|
|
What does alpha-amanitin do?
|
Inhibits RNA polymerase II leading to hepatic necrosis
|
|
Name the irreversible enzymes in glycolysis.
|
1. Hexokinase 2. Phosphofructokinase-1 3. Pyruvate kinase 4. Pyruvate dehydrogenase
|
|
In aerobic metabolism of glucose, which pathway produces 38 ATP?
|
Malate shuttle
|
|
What activated carriers carry: CH3 groups
|
1. S-adenosyl-methionine 2. N5-methyl-THF
|
|
What is the result of lack of disaccharidase activity of intestinal mucosa?
|
Osmotically active disaccharides suck water out of mucosa causing osmotic diarrhea.
|
|
What is the presentation of arsenic toxicity?
|
1. Vomiting 2. Rice water stools 3. Garlic breath
|
|
Enzyme function: DNA topoisomerases
|
Create a nick in the helix to relieve supercoils
|
|
What are the two most common glycolytic enzyme deficiencies?
|
Pyruvate kinase (95% of cases) followed by glucose phosphate isomerase (4% of cases)
|
|
What is the treatment for classic galactosemia?
|
Exclude galactose and lactose from the diet.
|
|
This oxidation accounts for about 2/3 of the total oxygen consumption and ATP production in most animals
|
Oxidation of acetyl coA to CO2 and H2O.
|
|
What activated carriers carry: Formyl groups
|
N10-formyl-THF
|
|
Where in the electron transport chain is ADP converted to ATP?
|
Complex V aka ATP synthase aka mitochondrial ATPase
|
|
What histologic change is seen in G6PD deficiency
|
Heinz bodies within red blood cells
|
|
What does NADPH deficiency in RBCs result in?
|
Hemolytic anemia
|
|
Which amino acids are necessary for purine synthesis?
|
Glycine, Aspartate, Glutamine
|
|
Which is active?: Phosphorylated or dephosphorylated pyruvate dehydrogenase
|
Dephosphorylated.
|
|
Uses of Succinyl CoA?
|
TCA intermediate, and biosynthesis of heme
|
|
How much ATP is produced by anaerobic glycolysis?
|
2 ATP per glucose
|
|
Which amino acids are basic?
|
Arginine, Lysine and Histidine Arginine and Lysine are increased in histones which bind negatively charged DNA. Histidine has no charge at body pH.
|
|
Where in the TCA does FADH2 come from?
|
Succinate to fumarate.
|
|
Pyruvate kinase: What inhibits it?
|
ATP (don't need more of me), Alanine (I came from pyruvate, so we don't need any more.)
|
|
Inhibitors of electron transport from Cytochrome a+a3 to Oxygen?
|
Cyanide, CO, and Sodium azide
|
|
What does 4-epimerase do?
|
converts between UDP-galactose and UDP-glucose
|
|
Where in the TCA does NADH come from?
|
Pyruvate to Acetyl CoA, Isocitrate to alpha-ketoglutarate, alpha-ketoglutarate to succinyl coA, Malate to Oxaloacetate
|
|
How much ATP is produced by the citric acid cycle per molecule of glucose?
|
24 ATP
|
|
What does it mean for genetic code to be redundant?
|
More than one codon may code for the same amino acid.
|
|
What is a reducing sugar?
|
A monosaccharide where the anomeric carbon (Carbon 1) is free.
|
|
What is the relation of polyols to sugars?
|
Polyols are monosaccharides where the carbonyl group is reduced to an alcohol.
|
|
What are the properties of the genetic code?
|
Unambiguous, Degenerate/ redundant, Commaless/nonoverlapping, and Universal
|
|
DNA polymerase I: Which direction does it read?
|
3' to 5'
|
|
Which tissues (7) need glucose as fuel?
|
Brain, RBCs, Renal medulla, lens, cornea, testes, exercising muscle
|
|
What does the mRNA initiation codon code for?
|
Methionine in eukaryotes. formyl-methionine in prokaryotes.
|
|
What happens during post-translational covalent alterations?
|
Either: 1. Phosphorylation 2. Glycosylation 3. Hydroxylation
|
|
Role of E site in protein synthesis
|
E site holds Empty tRNA as it Exits
|
|
What is the etiology of fructose intolerance?
|
1. Lack of aldolase B 2. Build up of Fructose-1-Phosphate 3. Decrease in available phosphate 4. Inhibition of glycogenolysis and gluconeogenesis
|
|
What activates isocitrate dehydrogenase?
|
ADP
|
|
Which post-translational modification involves phosphorylation?
|
post-translational covalent alteration
|
|
Where in the cell does the following occur: Fatty acid synthesis
|
Cytoplasm
|
|
Where does NADPH come from?
|
HMP shunt
|
|
What vitamin is necessary for regeneration of S-adenosyl-methionine?
|
Vitamin B12
|
|
This enzyme phosphorylates glucose and is feedback inhibited by Glucose-6-Phosphate.
|
Hexokinase (as opposed to glucokinase)
|
|
Protein malnutrition leads to what disease?
|
Kwashiorkor (as opposed to Marasmus from energy malnutrition)
|
|
What are the net products in glycolysis?
|
2 Pyruvate, 2 ATP, 2 NADH, 2 H+, 2 H20
|
|
When is NAD used?
|
Catabolic processes to carry reducing equivalents away as NADH
|
|
What is the difference in presentation between von Gierke's disease and fructose intolerance?
|
Both have hypoglycemia, jaundice, cirrhosis and vomiting. von Gierke's disease also has lactic acidosis whereas fructose intolerance does not.
|
|
Role of GTP in protein synthesis
|
GTP does tRNA Going places (aka translocation) and Gripping
|
|
Role of P site in protein synthesis
|
P site accomodates growing Peptide.
|
|
Disulfiram: Mechanism
|
Disulfiram inhibits acetaldehyde dehydrogenase, leading to an accumulation of acetaldehyde, leading to increased hangover symptoms.
|
|
Where is Fructose 1-6 bisphosphatase found?
|
Liver and kidney
|
|
How many ATP molecules are produced by aerobic metabolism of glucose?
|
38 via the Malate shuttle, and 36 via the G3P shuttle.
|
|
Sequence of events in the termination step of protein synthesis.
|
1. Completed protein is released from ribosome. 2. Ribosome dissociates.
|
|
Nucleotide excision repair: Mechanism
|
1. Specific endonucleases release the oligonucleotide containing damaged bases 2. DNA polymerase and ligase fill and reseal the gap, respectively
|
|
What is this molecule an activated carrier of?: Thiamine Pyrophosphate
|
Aldehydes
|
|
Pyruvate dehydrogenase deficiency: Mechanism
|
Backup of pyruvate and alanine leads to lactic acidosis.
|
|
Hunter's Syndrome vs Hurler's Syndrome: Physical deformity?
|
Hunter's: Mild to severe, Hurler's: Dwarfing, coarse facial features, (gargoylism)
|
|
What is the mechanism of ATPase inhibitors?
|
1. Directly inhibit mitochondrial ATPase causing: 2. Increased protein gradient and increased oxygen consumption, but no ATP is production
|
|
This enzyme phosphorylates glucose with high affinity.
|
Hexokinase (as opposed to glucokinase)
|
|
What are the 5 cofactors necessary for pyrvuate dehydrogenase and alpha-ketoglutarate dehydrogenase?
|
Lipoic acid plus the first four B vitamins in their active forms: 1. B1: TPP 2. B2: FAD 3. B3: NAD 4. B5: CoA
|
|
What activated carriers carry: Aldehydes
|
Thiamine Pyrophosphate
|
|
Ubiquitin or Ubiquinone: Proteosomal degradation
|
Ubiquitin
|
|
In aerobic metabolism of glucose, which pathway produces 36 ATP?
|
G3P shuttle
|
|
What is the mechanism of CN?
|
Electron transport inhibition
|
|
Inhibitors of electron transport from FMNH2 to Coenzyme Q?
|
Amytal and Rotenone
|
|
Ubiquitin or Ubiquinone: Coenzyme Q in oxidative phosphorylation
|
Ubiquinone
|
|
Which position on the codon is the wobble position?
|
3rd position
|
|
Prokaryotic genome: Describe DNA replication
|
Continuous bidirectional DNA synthesis on leading strand and discontinuous (Okazaki fragments) on lagging strand
|
|
DNA Topoisomerase II: Mechanism
|
cuts both strands, and passes an unbroken double strand through it then reanneals the cut strand
|
|
Eukaryotic genome: Trigger for replication
|
Consensus sequence of AT-rich base pairs
|
|
Enzyme function: Primase
|
Makes an RNA primer on which DNA polymerase III can initiate replication
|
|
Define promoter of gene expression.
|
Site where RNA polymerase and multiple other transcription factors bind to DNA upstream from gene locus
|
|
What characterizes a promoter of gene expression?
|
AT-rich upstream sequence with TATA and CAAT boxes
|
|
Amino acid binding to tRNA: Where (on the tRNA) and how?
|
Where: 3' end How: Covalently
|
|
Special points about RNA polymerase II
|
1. Opens DNA at promoter site 2. Inhibited by alpha-amanitin
|
|
Which group is more likely to have G6PD deficiency?
|
Blacks
|
|
What activates pyruvate dehydrogenase?
|
1. Increased NAD/NADH ratio (We need more NADH.) 2. Increased ADP (We need more ATP.) 3. Ca2+ (More of me leads muscles to contract)
|
|
Kwashiorkor: Clinical picture
|
Small child with a swollen belly and depigmented hair.
|
|
What is this molecule an activated carrier of?: NADPH
|
Electrons
|
|
What activated carriers carry: Electrons
|
1. NADH 2. NADPH 3. FADH2
|
|
What are the consequences of the altered NADH/NAD ratio seen in alcoholics?
|
Short-term: Hypoglycemia, Long-term: Hepatic fatty change
|
|
What is this molecule an activated carrier of?: FADH2
|
Electrons
|
|
What is this molecule an activated carrier of?: Tetrahydrofolate
|
1-carbon units
|
|
What are the net reactants in glycolysis?
|
Glucose, 2 Phosphates, 2 ADP, 2 NAD
|
|
What activated carriers carry: Phosphoryl
|
ATP and GTP
|
|
What is this molecule an activated carrier of?: Biotin
|
CO2
|
|
Nonhomologous end joining: Mechanism
|
Brings together two ends of DNA fragments (no requirement for homology)
|
|
Mismatch repair: Mechanism
|
1. Unmethylated, newly synthesized string is recognized 2. Mismatched nucleotides are removed 3. Gap is refilled and resealed
|
|
What is glutathione used for?
|
Detoxification of free radicals and peroxides.
|
|
What are exceptions to universality of genetic code?
|
Mitochondria, Archaebacteria, Mycoplasma, and Some Yeasts
|
|
What is on the 3' end of a nucleotide
|
Hydroxyl group
|
|
Types of DNA repair
|
Single stranded: Nucleotide excision repair, Base excision repair, and Mismatch repair; Double Stranded: Nonhomologous end joining
|
|
DNA polymerase I: Which direction does it proofread?
|
5' to 3'
|
|
DNA polymerase III: Which direction does it proofread?
|
3' to 5'
|
|
Enzyme function: DNA polymerase III
|
Elongates the chain
|
|
Hunter's Syndrome vs Hurler's Syndrome: Severity?
|
Hunter's: Less Hurler's: More
|
|
What enzyme is missing in hereditary fructose intolerance?
|
Aldolase B
|
|
What enzyme converts UDP-glucose to UDP-galactose?
|
Uridyl transferase
|
|
When is genetic code not commaless/nonoverlapping?
|
In some viruses
|
|
Which amino acids are acidic?
|
Aspartate and glutamate are negatively charged at body pH
|
|
Where is sorbitol dehydrogenase found?
|
Liver and gonads (ovaries, seminal vesicles, sperm)
|
|
How does lactose intolerance present?
|
1. Bloating 2. Cramps 3. Osmotic diarrhea
|
|
Hunter's Syndrome vs Hurler's Syndrome: Inheritance?
|
Hunter's: X-linked Recessive, Hurler's (and all other mucopolysaccharidoses): Autosomal recessive
|
|
How many nucleotides does tRNA contain?
|
75 to 90 nucleotides
|
|
Pyruvate kinase: What stimulates it?
|
Fructose-1,6-BP (I was told we needed more ATP, so here I am, so you better move the line along.)
|
|
What enzyme converts galactose to galactitol?
|
Aldose reductase
|
|
What are the important products of the HMP pathway?
|
2 NADPH, Ribose, and glyceraldehyde-3-Phosphate and Fructose-6-phosphate
|
|
What activated carriers carry: CO2
|
Biotin
|
|
What reacts to yield S-adenosyl-methionine?
|
ATP and methionine
|
|
What does it mean for genetic code to be unambiguous?
|
Each codon specifies only one amino acid.
|
|
What does it mean for genetic code to be commaless?
|
Read from a fixed starting point as a continuous sequence of bases
|
|
Define enhancer of gene expression.
|
Stretch of DNA that alters gene expression by binding transcription factors. May be located anywhere.
|
|
When is NADPH used?
|
1. Anabolic process (steroid and fatty acid synthesis) 2. Respiratory burst 3. P-450
|
|
Zinc deficiency: Presentation
|
Delayed wound healing, hypogonadism, and decreased adult hair (axillary, facial, pubic)
|
|
What does transketolase require?
|
Thiamine (Vitamin B1)
|
|
What does aldose reductase do?
|
Converts galactose to galactitol
|
|
Zinc deficiency: Predisposes to what?
|
Alcoholic cirrhosis
|
|
What inhibits isocitrate dehydrogenase?
|
ATP and NADH
|
|
What is the mechanism behind chronic fatty change in alcoholics?
|
1. Ethanol metabolism leads to an increased NADH/NAD ratio in the liver. 2. This ratio prefers fatty acid synthesis over glycolysis.
|
|
I-Cell disease: Presentation
|
Skeletal abnormalities, restricted joint movement, coarse facial features, severe psychomotor impairment, death by 8 years
|
|
What is this molecule an activated carrier of?: Lipoamide
|
Acyl
|
|
How much ATP is used in the pentose phosphate shunt?
|
None
|
|
What reaction does citrate synthase catalyze?
|
Oxaloacetate and acetyl coA combine to yield citrate.
|
|
mRNA initiation codons
|
1. AUG (inAUGurates protein synthesis) 2. GUG (rarely)
|
|
What does Uridyl transferase do?
|
1. converts UDP-glucose to UDP-galactose 2. converts Galactose-1-Phosphate to Glucose-1-Phosphate
|
|
What enzyme converts UDP-galactose to UDP-glucose?
|
4-epimerase
|
|
Chromatin structure: What histones are included and which of these are not in the nucleosome core?
|
H1 (only one not in the core), H2A, H2B, H3, and H4
|
|
Which drug inhibits acetaldehyde dehydrogenase?
|
Disulfiram
|
|
Marasmus: Clinical presentation
|
Tissue and muscle wasting, loss of subcutaneous fat, and variable edema
|
|
Hunter's Syndrome vs Hurler's Syndrome: Which GAGs' degradation is affected?
|
Both: Dermatan sulfate and Heparan sulfate
|
|
What is the result of promoter mutation?
|
Dramatic decrease in amount of gene transcribed
|
|
Anode: What does it contain?
|
Cations
|
|
Phosphofructokinase-1: What stimulates it?
|
AMP (Hey, we need more ATP), Fructose-2,6-BP (The fact that I'm being made means there's tons of glucose.)
|
|
Names of the steps in protein synthesis
|
1. Initiation 2. Elongation 3. Termination
|
|
This enzyme phosphorylates glucose with a low capacity.
|
Hexokinase (as opposed to glucokinase)
|
|
This enzyme phosphorylates glucose with low affinity.
|
Glucokinase (as opposed to hexokinase)
|
|
Pyruvate dehydrogenase deficiency: Presentation
|
Lactic acidosis and neurologic defects
|
|
What are Heinz bodies?
|
altered Hemoglobin precipitates within RBCs, found in G6PD deficiency
|
|
Lipoamide or lipoate: Which carries aldehydes?
|
Lipoamide
|
|
What happens in post-translational trimming?
|
removal of N or C terminal pro-peptides from zymogens to generate mature proteins
|
|
Define operator of gene expression
|
Site where repressors bind
|
|
What is the mechanism of thermogenin?
|
Uncoupling protein OR UCP which is an uncoupling agent
|
|
How much ATP is produced by the citric acid cycle per molecule of acetyl coA?
|
12 ATP.
|
|
Anode: What does it attract?
|
Anions
|
|
Pyruvate kinase: What does it do?
|
Pyruvate kinase converts phosphoenolpyruvate to pyruvate, thereby producing two ATP.
|
|
Inhibitors of electron transport from Cytochrome b to Cytochrome C?
|
Antimycin A
|
|
What sequence does every tRNA share at the 3' end?
|
CCA along with a high percentage of chemically modified bases
|
|
In nucleic acids, what kind of substitution is a transition?
|
TransItion = Identical type (Purine for purine or pyrimidine for pyrimidine)
|
|
This enzyme phosphorylates glucose and is not feedback inhibited.
|
Glucokinase (as opposed to hexokinase)
|
|
Cyanogen bromide cleaves peptides at which side of what residues?
|
C-terminal of methionine
|
|
This enzyme phosphorylates glucose with a high capacity.
|
Glucokinase (as opposed to hexokinase)
|
|
What is on the 5' end of a nucleotide
|
Triphosphate
|
|
Chymotrypsin cleaves peptides at which side of what residues?
|
C-terminal side of tyrosine, phenylalanine, and tryptophan residues
|
|
Cathode: What does it contain?
|
Anions
|
|
What type of bonds hold the phosphoryls together in ATP, and how much energy are the bonds worth?
|
Phosphoanhydride bonds are worth 7 kilocalories per mole (but only between the alpha and beta and the beta and the gamma)
|
|
In what condition is mismatch excision repair mutated?
|
Hereditary Nonpolyposis Colon Cancer (HNPCC)
|
|
What is this molecule an activated carrier of?: NADH
|
Electrons
|
|
Where in the cell does the following occur: Protein Synthesis
|
Rough endoplasmic reticulum in the cytoplasm
|
|
What are the requirements of PEP carboxykinase?
|
GTP
|
|
Hunter's Syndrome vs Hurler's Syndrome: Corneal clouding?
|
Hunter's: No, Hurler's: Yes
|
|
Which steps in the citric acid cycle produce ATP?
|
None, however 1 GTP is produced from the conversion of Succinyl CoA to Succinate.
|
|
Ethanol metabolism: Limiting reagent
|
NAD+
|
|
What does NADPH deficiency in RBCs result in?
|
Hemolytic anemia
|
|
Enzyme function: DNA polymerase I
|
Degrades RNA primer and fills in the gap with DNA
|
|
In what condition is nucleotide excision repair mutated?
|
Xeroderma pigmentosa (dry skin with melanoma and other cancers)
|
|
Where in the cell does the following occur: Gluconeogenesis
|
Pathway has steps in the mitochondria and in the cytoplasm
|
|
Role of A site in protein synthesis
|
A site holds incoming Aminoacyl tRNA.
|
|
Hunter's Syndrome vs Hurler's Syndrome: Aggressive behavior?
|
Hunter's: Yes, Hurler's: No
|
|
What is the treatment for fructose intolerance?
|
Decreased intake of both fructose and sucrose.
|
|
Where in the electron transport chain do NADH and FADH2 release their electrons?
|
Complex I
|
|
Refsum Disease: Pathophysiology
|
Inability to degrade phytanic acid, resulting in accumulation in plasma and tissues
|
|
DNA polymerase III: Mechanism
|
1. Adds deoxynucleotides to the 3' end until it reaches primer of preceding fragment, 2. 3' to 5' exonuclease activity proofreads each nucleotide
|
|
What is this molecule an activated carrier of?: Coenzyme A
|
Acyl
|
|
What is alternative splicing?
|
Rearrangement of exons to make unique proteins
|
|
Chromatin structure: In the beads on a string analogy, what is the string and how long is it?
|
Histone H1 ties the nucleosomes together in a 30-nm fiber string
|
|
What are the rate limiting steps of glycolysis?
|
1. Hexokinase (Glucose to G-6-P) 2. *Phosphofructokinase-1 (Fructose-6-P to Fructose-1,6-BP) 3. Pyruvate kinase (PEP to Pyruvate)
|
|
What inhibits pyruvate dehydrogenase?
|
1. NADH (No more of me please) 2. ATP (likewise) 3. Acetyl CoA (ditto)
|
|
Where does the pentose phosphate pathway happen?
|
Cytoplasm of Red Blood Cells, and in lactating mammary glands, liver, and adrenal cortex (all sites of fatty acid or steroid synthesis except RBCs)
|
|
What is rotenone?
|
An electron transport inhibitor.
|
|
What vitamin is necessary for regeneration of S-adenosyl-methionine?
|
Vitamin B12
|
|
What disease state is glycolytic enzyme deficiency generally associated with?
|
Hemolytic anemia
|
|
Phosphofructokinase-1: What inhibits it?
|
ATP (don't need more of me), Citrate (my cycle is going well)
|
|
Name some oxidizing agents that someone with a G6PD deficiency is vulnerable to.
|
1. Fava beans 2. Sulfonamides 3. Primaquine 4. Antituberculosis drugs
|
|
What activated carriers carry: Acyl
|
1. Coenzyme A 2. Lipoamide
|
|
What reaction does citrate synthase catalyze?
|
Oxaloacetate and acetyl coA combine to yield citrate.
|
|
What toxin inhibits lipoic acid?
|
Arsenic
|
|
What are the requirements of PEP carboxykinase?
|
GTP
|
|
What are the main products of the pentose phosphate shunt and their uses?
|
1. NADPH (for fatty acid and steroid synthesis) 2. Ribose-5-phosphate (for nucleotide synthesis) 3. G3P and F6P (glycolytic intermediates)
|
|
Chondroitin Sulfate: Where found?/Distinguishing characteristic from other GAGs
|
Cartilage, tendons, ligaments, aorta. Most abundant GAG in body.
|
|
Keratan Sulfate: Where found?/Distinguishing characteristic from other GAGs
|
Found in cartilage proteoglycan aggregates with chondroitin sulfate, and in cornea. Most heterogeneous GAG.
|
|
ATP and methionine react to form what?
|
S-adenosyl-methionine
|
|
DNA Topoisomerase I: Mechanism
|
cuts one strand, passes the other through it then reanneals the cut strand
|
|
What enzyme converts galactose to galactitol?
|
Aldose reductase
|
|
What is the treatment for classic galactosemia?
|
Exclude galactose and lactose from the diet.
|
|
What is glutathione used for?
|
Detoxification of free radicals and peroxides.
|
|
What is the most common congenital heart disease in adults?
|
Atrial Septal Defects
|
|
What are Aschoff Bodies?
|
Central fibrinoid necrosis surrounded by reactive histiocytes
|
|
Where is the murmur best heard for patent ductus arteriosus?
|
Between the shoulder blades
|
|
What are two common findings in myocarditis?
|
Aschoff bodies Anitschkow Cells the two Russians
|
|
What organism is involved in Rheumatic Fever?
|
Group A Strept Step. pyogenes
|
|
What are five signs of Rheumatic fever?
|
Carditis, Migratory polyarthritis, Subcutaneous Nodules, Erythema Marginatum, Sydenham's Chorea
|
|
What valve is involved in a mid-systolic click?
|
Mitral Valve Prolapse, It clicks half way since the chordae restrain it
|
|
What viral infection is involved with patent ductus arteriosus?
|
Rubella
|
|
What is the most common congenital heart disease in children?
|
Ventricular Septal Defect (VSD) Very Small Dudes
|
|
How long after a group A step. pharyngitis does Rheumatic Fever occur?
|
1-5 weeks after episode
|
|
What genetic disorder is associated with coarctation of the aorta?
|
Turner Syndrome
|
|
What are the three A's in Atrial Septal Defects?
|
Adults, Alcohol Fetal Syndrome, ALL from Down Syndrome
|
|
What two diseases have Mitral Valve Prolapse?
|
Marfan's Syndrome and Ehlers Danlos
|
|
What murmur is heard in MV/TV regurgitation?
|
Pansystolic murmur
|
|
What murmur is heard in AV/PV regurgitation?
|
high pitched diastolic murmur directly after S2
|
|
What is associated w/ Libman Sacks endocarditis?
|
SLE
|
|
What DZ has sterile vegetations covered on valvular surfaces?
|
SLE -libman sacks endocarditis
|
|
What two diseases are involved w/ mucin-producing sterile vegetations?
|
tumors of colon and pancreas Marantic vegetations
|
|
What other pathogens cause myocarditis?
|
Borrelia (Lyme Dz), T. cruzi (Chagas), Tichinella spiralis (trichinosis)
|
|
What is the MCC of pericarditis?
|
Coxsackievirus again!
|
|
What disease involves hypotension associated w/ pulsus paradoxus?
|
pericarditis
|
|
What is pulsus paradoxus?
|
BP decrease in >10mmHg in systole during inspiration
|
|
What other sign is seen in pericarditis?
|
Kussmaul's Sign
|
|
What is Kussmaul's sign?
|
neck vein distension on inspiration, blood refluxes to jugular vein instead of entering RA
|
|
What is the MCC of constrictive pericarditis?
|
TB worldwide
|
|
What is the genetic problem in hypertrophic cardiomyopathy?
|
mutation in heavy chain of beta-myosin and troponins [AD]
|
|
What is the MC site of metastasis to cardiac tissue?
|
pericardium
|
|
What disease is associated with cardiac rhabdomyoma?
|
Tuberous Sclerosis
|
|
What is the pathogenesis of mitral valve prolapse?
|
increase/accumulation of dermatan sulfate
|
|
What is the characteristic murmur of mitral valve prolapse?
|
mid-systolic click
|
|
When does the murmur (mid-systolic click) approach to S1?
|
decrease in preload, less blood
|
|
Classic Finding for: Soap bubble on x-ray
|
Giant cell tumor of bone
|
|
Classic Finding for: Alport?s syndrome
|
Hereditary nephritis with nerve deafness
|
|
Classic Finding for: Cotton-wool spots
|
Chronic hypertension
|
|
Classic Finding for: Recurrent pulmonary Pseudomonas and S. aureus infections
|
Cystic fibrosis
|
|
Classic Finding for: Birbeck granules on EM
|
Histiocytosis X (eosinophilic granuloma)
|
|
Classic Finding for: Pseudorosettes
|
Ewing's sarcoma
|
|
Classic Finding for: S4
|
Aortic stenosis, hypertrophic subaortic stenosis
|
|
Classic Finding for: Trousseau's sign
|
Visceral cancer, pancreatic adenocarcinoma (migratory thrombophlebitis), hypocalcemia (carpal spasm)
|
|
Classic Finding for: Bilateral hilar adenopathy, uveitis
|
Sarcoidosis
|
|
Classic Finding for: Wallenberg's syndrome
|
Posterior Inferior Cerebellar Artery thrombosis
|
|
Classic Finding for: Wilson's disease
|
Hepatolenticular degeneration
|
|
Classic Finding for: Spitz nevus
|
Benign juvenile melanoma
|
|
Classic Finding for: Kartagener's syndrome
|
Dynein defect
|
|
Classic Finding for: Thyroidization of kidney
|
Chronic bacterial pyelonephritis
|
|
Classic Finding for: Tophi
|
Gout
|
|
Classic Finding for: Libman-Sacks disease
|
Endocarditis associated with SLE
|
|
Classic Finding for: Cerebriform nuclei
|
Mycosis fungoides (cutaneous T-cell lymphoma)
|
|
Classic Finding for: Rotor's syndrome
|
Congenital conjugated hyperbilirubinemia
|
|
Classic Finding for: S3
|
Left-to-right shunt (VSD, PDA, ASD), mitral regurgitation, LV failure (CHF)
|
|
Classic Finding for: Kimmelstiel-Wilson nodules
|
Diabetic nephropathy
|
|
Classic Finding for: Xanthochromia (CSF)
|
Subarachnoid hemorrhage
|
|
Classic Finding for: Call-Exner bodies
|
Granulosa-theca cell tumor of the ovary
|
|
Classic Finding for: Nephritis + cataracts + hearing loss
|
Alport's syndrome
|
|
Classic Finding for: Arnold-Chiari malformation
|
Cerebellar tonsillar herniation
|
|
Classic Finding for: Glanzmann's thrombasthenia
|
Defect in platelet aggregation IIb/IIIa
|
|
Classic Finding for: Heterophil antibodies
|
Infectious mononucleosis (EBV)
|
|
Classic Finding for: Krukenberg tumor
|
Gastric adenocarcinoma with ovarian metastases
|
|
Classic Finding for: Baker's cyst in popliteal fossa
|
Rheumatoid arthritis
|
|
Classic Finding for: Hypertension + hypokalemia
|
Conn's syndrome
|
|
Classic Finding for: Diabetes insipidus + exophthalmos + lesions of the skull
|
Hand–Schüller–Christian disease (multifocal Langerhans cell histiocytosis)
|
|
Classic Finding for: Reinke crystals
|
Leydig cell tumor
|
|
Classic Finding for: Reid index (increased)
|
Chronic bronchitis
|
|
Classic Finding for: von Recklinghausen's disease of bone
|
Osteitis fibrosa cystica (?brown tumor?)
|
|
Classic Finding for: Russell bodies
|
Multiple myeloma
|
|
Classic Finding for: Rouleaux formation (RBCs)
|
Multiple myeloma
|
|
Classic Finding for: Schiller-Duval bodies
|
Yolk sac tumor
|
|
Classic Finding for: Periosteal elevation on x-ray
|
Pyogenic osteomyelitis
|
|
Classic Finding for: Sulfur granules
|
Actinomyces israelii
|
|
Classic Finding for: Gilbert's syndrome
|
Benign congenital unconjugated hyperbilirubinemia
|
|
Classic Finding for: Renal epithelial casts in urine
|
Acute toxic/viral nephrosis
|
|
Classic Finding for: Podagra
|
Gout (MP joint of hallux)
|
|
Classic Finding for: Lewy bodies
|
Parkinson's disease
|
|
Classic Finding for: Renal cell carcinoma + cavernous hemangiomas + adenomas
|
von Hippel-Lindau disease
|
|
Classic Finding for: Actinic keratosis
|
Often precedes squamous cell carcinoma
|
|
Classic Finding for: Starry-sky pattern
|
Burkitt's lymphoma
|
|
Classic Finding for: Eburnation
|
Osteoarthritis (polished, ivory-like appearance of bone)
|
|
Classic Finding for: Arachnodactyly
|
Marfan's syndrome
|
|
Classic Finding for: Pick's disease
|
Progressive dementia, similar to Alzheimer?s
|
|
Classic Finding for: Pannus
|
Rheumatoid arthritis
|
|
Classic Finding for: Mallory bodies
|
Alcoholic liver disease
|
|
Classic Finding for: MLF syndrome (INO)
|
Multiple sclerosis
|
|
Classic Finding for: "Smudge cell"
|
CLL
|
|
Classic Finding for: Pick bodies
|
Pick's disease
|
|
Classic Finding for: Hyperphagia + hypersexuality + hyperorality + hyperdocility
|
Klüver–Bucy syndrome (amygdala)
|
|
Classic Finding for: Owl's eye
|
CMV
|
|
Classic Finding for:Klüver–Bucy syndrome
|
Bilateral amygdala lesions
|
|
Classic Finding for: Crigler-Najjar syndrome
|
Congenital unconjugated hyperbilirubinemia
|
|
Classic Finding for: Job's syndrome
|
Neutrophil chemotaxis abnormality
|
|
Classic Finding for: Spike and dome on EM
|
Membranous glomerulonephritis
|
|
Classic Finding for: Shwartzman reaction
|
Neisseria meningitidis
|
|
Classic Finding for: Burkitt's lymphoma
|
8:14 translocation; associated with EBV
|
|
Classic Finding for: Chancroid
|
Haemophilus ducreyi (painful)
|
|
Classic Finding for: Charcot's triad
|
Multiple sclerosis (nystagmus, intention tremor, scanning speech), cholangitis (jaundice, RUQ pain, fever)
|
|
Classic Finding for: Bartter's syndrome
|
Hyperreninemia
|
|
Classic Finding for: Bernard-Soulier disease
|
Defect in platelet adhesion
|
|
Classic Finding for: Hand–Schüller–Christian disease
|
Chronic progressive histiocytosis
|
|
Classic Finding for: Gaucher's disease
|
Glucocerebrosidase deficiency
|
|
Classic Finding for: t(8;14)
|
Burkitt's lymphoma (c-myc activation)
|
|
Classic Finding for: Homer Wright rosettes
|
Neuroblastoma
|
|
Classic Finding for: Erb-Duchenne palsy
|
Superior trunk brachial plexus injury ("waiter's tip")
|
|
Classic Finding for: Brushfield's spots
|
Down syndrome
|
|
Classic Finding for: "Brown tumor" of bone
|
Hemorrhage causes brown color of osteolytic cysts: 1. Hyperparathyroidism 2. Osteitis fibrosa cystica (von Recklinghausen's disease)
|
|
Classic Finding for: Edwards' syndrome
|
Trisomy 18 associated with rocker-bottom feet, low-set ears, heart disease
|
|
Classic Finding for: Whipple's disease
|
Malabsorption syndrome caused by Tropheryma whippelii
|
|
Classic Finding for: Branching rods in oral infection
|
Actinomyces israelii
|
|
Classic Finding for: Reed-Sternberg cells
|
Hodgkin's lymphoma
|
|
Classic Finding for: Nutmeg liver
|
CHF
|
|
Classic Finding for: Negri bodies
|
Rabies
|
|
Classic Finding for: Wermer's syndrome
|
MEN type I
|
|
Classic Finding for: Sipple's syndrome
|
MEN type IIa
|
|
Classic Finding for: Bouchard's nodes
|
Osteoarthritis (PIP swelling 2º to osteophytes)
|
|
Classic Finding for:Chédiak–Higashi disease
|
Phagocyte deficiency
|
|
Classic Finding for: Subepithelial humps on EM
|
Poststreptococcal glomerulonephritis
|
|
Classic Finding for: Caisson disease
|
Gas emboli
|
|
Classic Finding for: Charcot-Leyden crystals
|
Bronchial asthma (eosinophil membranes)
|
|
Classic Finding for: Sézary's syndrome
|
Cutaneous T-cell lymphoma
|
|
Classic Finding for: Cowdry type A bodies
|
Herpesvirus
|
|
Classic Finding for: Dog or cat bite
|
Pasteurella multocida
|
|
Classic Finding for: Fanconi's syndrome
|
Proximal tubular reabsorption defect
|
|
Classic Finding for: Intussusception
|
Adenovirus (causes hyperplasia of Peyer's patches)
|
|
Classic Finding for: Boutonniere deformity
|
Rheumatoid arthritis
|
|
Classic Finding for: Lisch nodules
|
Neurofibromatosis (von Recklinghausen's disease)
|
|
Classic Finding for: Huntington's disease
|
Caudate degeneration (autosomal dominant)
|
|
Classic Finding for: von Recklinghausen's disease
|
Neurofibromatosis with Café au lait spots
|
|
Classic Finding for: Skip lesions
|
Crohn's
|
|
Classic Finding for: Streaky ovaries
|
Turner's syndrome
|
|
Classic Finding for: Xerostomia + arthritis + keratoconjunctivitis sicca
|
Sjögren's syndrome
|
|
Classic Finding for: Suboccipital lymphadenopathy
|
Rubella
|
|
Classic Finding for: Albuminocytologic dissociation
|
Guillain–Barré syndrome (↑ protein in CSF with only modest ↑ in cell count)
|
|
Classic Finding for: Atrophy of the mammillary bodies
|
Wernicke's encephalopathy
|
|
Classic Finding for: Heberden's nodes
|
Osteoarthritis (DIP swelling 2º to osteophytes)
|
|
Classic Finding for: Blue-domed cysts
|
Fibrocystic change of the breast
|
|
Classic Finding for: HbF
|
Thalassemia major
|
|
Classic Finding for: Donovan bodies
|
Granuloma inguinale
|
|
Classic Finding for: Howell-Jolly bodies
|
Splenectomy (or nonfunctional spleen)
|
|
Classic Finding for: Antineutrophil antibodies
|
Vasculitis
|
|
Classic Finding for: Curschmann's spirals
|
Bronchial asthma (whorled mucous plugs)
|
|
Classic Finding for: t(14;18)
|
Follicular lymphomas (bcl-2 activation)
|
|
Classic Finding for: Cherry-red spot on macula
|
Tay-Sachs, Niemann-Pick disease, central retinal artery occlusion
|
|
Classic Finding for: Ferruginous bodies
|
Asbestosis
|
|
Classic Finding for: Councilman bodies
|
Toxic or viral hepatitis
|
|
Classic Finding for: Cold agglutinins
|
Mycoplasma pneumoniae, infectious mononucleosis
|
|
Classic Finding for: Mallory-Weiss syndrome
|
Esophagogastric lacerations
|
|
Classic Finding for: Bruton's disease
|
X-linked agammaglobulinemia
|
|
Classic Finding for: Albright's syndrome
|
Polyostotic fibrous dysplasia, precocious puberty, Café au lait spots, short stature, young girls
|
|
Classic Finding for: Antigliadin antibodies
|
Celiac disease
|
|
What four things arise from surface ectoderm?
|
1. Adenohypophysis, 2. Lens of eye, 3. Epithelial linings, 4. Epidermis
|
|
What is the embryologic tissue origin of Microglia (ecto/meso/edo)?
|
Mesoderm
|
|
What ear muscle does the 1st branchial arch form?
|
Tensor tympani
|
|
What does the left 4th aortic arch give rise to?
|
Aortic arch
|
|
What four structures make up the diaphragm?
|
1.Septum transversum; 2.Pleuroperitoneal folds; 3.Body wall; 4.Dorsal mesentery of esophagus
|
|
Does the serous linings of body cavities arise from neural crest (ectoderm), mesoderm, or endoderm?
|
Mesoderm
|
|
What effects does cocaine have on the fetus?
|
Abnormal fetal development and fetal addiction
|
|
What is the male homologue to the greater vestibular glands (of Bartholin) in the female?
|
Bulbourethral glands (of Cowper)
|
|
What are the 4th and 6th branchial arch derivatives innervated by?
|
CN X
|
|
What is the female homologue to the ventral shaft of the penis in the male?
|
Labia minora
|
|
The right common cardinal vein and right anterior cardinal vein give rise to what adult heart structure?
|
Superior vena cava
|
|
What are the 1st branchial arch derivatives innervated by?
|
CN V2 and V3
|
|
Which muscles (8) are derivatives of the 1st branchial arch?
|
-Temporalis-Masseter-Lateral pterygoid-Medial pterygoid-Mylohyoid-Anterior belly of digastric-Tensor tympani-Tensor veli palatini
|
|
Which two embryonic tissues are branchial arches derived from?
|
Mesoderm and neural crests
|
|
Which week of fetal development have the genitalia taken on male/female characteristics?
|
Week 10
|
|
What is oligohydramnios?
|
Less than 0.5 L of amniotic fluid
|
|
Which branchial arch does Meckel's cartilage develop from?
|
1st arch
|
|
What suppresses the development of the paramesonephric ducts in males?
|
Mullerian inhibiting substance (secreted by the testes)
|
|
How does a cleft lip form?
|
Failure of fusion of the maxillary and medial nasal processes
|
|
What does the primitive atria give rise to?
|
Trabeculated left and right atrium
|
|
Does the pia arise from neural crest (ectoderm), mesoderm, or endoderm?
|
Neural Crest (Ectoderm)
|
|
When do primary oocytes begin meiosis I?
|
During fetal life
|
|
Which branchial arch forms the incus and malleus of the ear?
|
1st arch
|
|
Which pharyngeal arch does Reichert's cartilage develop from?
|
2nd arch
|
|
Is a secondary spermatocyte N or 2N?
|
2N
|
|
What does the foramen ovale give rise to?
|
Fossa ovalis
|
|
What five things arise from neuroectoderm?
|
-Neurohypophysis-CNS neurons-Oligodendrocytes-Astrocytes-Pineal gland
|
|
What is polyhydramnios?
|
Greater than 1.5-2 L of amniotic fluid
|
|
What can be found in the cortex of the thymus?
|
It is dense with immature T cells
|
|
Meiosis II is arrested in which phase until fertilization?
|
Metaphase (an egg MET a sperm)
|
|
What is a urachal cyst or sinus a remnant of?
|
The allantois
|
|
What is associated with an epispadias?
|
Exstrophy of the bladder
|
|
What is the normal remnant of the thyroglossal duct?
|
Foramen cecum
|
|
What is the flagellum (tail) derived from?
|
One of the centrioles
|
|
What does the primitive ventricle give rise to?
|
Trabeculated parts of the left and right ventricle
|
|
What does the thymus arise from?
|
Epithelium of the 3rd branchial pouch
|
|
What are the cartilage derivatives (5) of the 4th and 6th branchial arches?
|
-Thyroid-Cricoid-Arytenoids-Corniculate-Cuneiform
|
|
What does the 1st aortic arch give rise to?
|
Part of the maxillary artery
|
|
What four things does Reichert's cartilage (from the 2nd arch) develop into?
|
-Stapes-Styloid process-Lesser horn of hyoid-Stylohyoid ligament
|
|
What four things does the dorsal pancreatic bud become?
|
Body, Tail, Isthmus, and Accessory Pancreatic Duct
|
|
Which is more common a hypospadias or epispadias?
|
Hypospadias
|
|
What is a single umbilical artery associated with?
|
Congenital and chromosomal anomalies
|
|
From what does the ligamentum teres hepatis arise?
|
Umbilical vein
|
|
How does a bicornate uterus form?
|
Results from incomplete fusion of the paramesonephric ducts
|
|
What does the 5th pharyngeal pouch develop into?
|
C cells of the thyroid
|
|
Is a primary spermatocyte 2N or 4N?
|
4N
|
|
How long does full development of spermatogenesis take?
|
2 months
|
|
What induces the ectoderm to form the neuroectoderm (neural plate)?
|
Notochord
|
|
Does the thymus arise from neural crest (ectoderm), mesoderm, or endoderm?
|
Endoderm
|
|
What fetal landmark has occurred within week 3 of fertilization?
|
Gastrulation
|
|
Which muscles (4) are derivatives of the 2nd branchial arch?
|
-Muscles of facial expression-Stapedius-Stylohyoid-Posterior belly of digastric
|
|
What is the female homologue to the corpus spongiosum in the male?
|
Vestibular bulbs
|
|
Do the urogenital structures arise from neural crest (ectoderm), mesoderm, or endoderm?
|
Mesoderm
|
|
What is polyhydramnios associated with?
|
Esophageal/duodenal atresia and Anencephaly
|
|
Is a spermatid haploid or diploid?
|
Haploid, N
|
|
What four things does the mesonephric (wolffian) duct develop into?
|
-Seminal vesicles-Epididymis-Ejaculatory duct-Ductus deferens
|
|
What is Potter's syndrome?
|
Bilateral renal agenesis, that results in ologohydramnios causing limb and facial deformities and pulmonary hypoplasia
|
|
Is a speratogonium haploid or diploid?
|
Diploid, 2N
|
|
After the first breath at birth, what causes closure of the ductus arteriosus?
|
An increase in oxygen
|
|
What is a hypospadias?
|
Abnormal opening of penile urethra on inferior side of penis due to failure of urethral folds to close
|
|
When does fetal erythropoiesis occur in the spleen?
|
Weeks 9-28
|
|
What type of twins would have 2 amniotic sacs and 2 placentas?
|
Monozygotic or dizygotic twins
|
|
What three things does the paramesonephric (mullerian) duct develop into?
|
-Fallopian tube-Uterus-Part of the vagina
|
|
What does the 4th pharyngeal pouch develop into?
|
Superior parathyroids
|
|
What connects the thyroid diverticulum to the tongue?
|
The thyroglossal duct
|
|
What type of twins would have 1 placenta, 2 amniotic sacs, and 1 chorion?
|
Monozygotic twins
|
|
What embryologic defect is thoracic outlet syndrome caused by?
|
by having a cervical rib.
|
|
How does a cleft palate form?
|
Failure of fusion of the lateral palatine processes, the nasal septum, and/or the median palatine process
|
|
What does the right horn of the sinus venosus give rise to?
|
Smooth part of the right atrium
|
|
When does fetal erythropoiesis occur in the liver?
|
Weeks 6-30
|
|
Which two branchial arches form the posterior 1/3 of the tongue?
|
3rd and 4th arches
|
|
What is the male homologue to the glans clitoris in the female?
|
Glans penis
|
|
Which muscles are derivatives of the 6th branchial arch?
|
All intrinsic muscles of the larynx, except the cricothyroid
|
|
What does the notochord give rise to?
|
Nucleus Pulposus
|
|
What three structures does the 3rd pharyngeal pouch develop into?
|
-Thymus-Left inferior parathyroid-Right inferior parathyroid
|
|
Is a secondary spermatocyte haploid or diploid?
|
Haploid, 2N
|
|
What does the 6th aortic arch give rise to?
|
The proximal part of the pulmonary arteries and (on left only) ductus arteriosus
|
|
What does the ligamentum venosum come from?
|
Ductus venosus
|
|
What is the female homologue to the scrotum in the male?
|
Labia majora
|
|
What four things does Meckel's cartilage (from the 1st arch) develop into?
|
-Mandible-Malleus-Incus-Sphenomandibular ligament
|
|
An abnormal opening of penile urethra on superior side of penis due to faulty positioning of the genital tubercle.
|
Epispadias
|
|
Which branchial arch forms the anterior 2/3 of the tongue?
|
1st arch
|
|
What does aberrant development of the 3rd and 4th pouches cause?
|
DiGeorge's syndrome
|
|
What is the food supply of sperm?
|
Fructose
|
|
What embryonic structure are the smooth parts of the left and right ventricle derived from?
|
Bulbus cordis
|
|
What embryonic structure does the coronary sinus come from?
|
Left horn of the sinus venosus
|
|
What are the 2nd branchial arch derivatives innervated by?
|
CN VII
|
|
When does fetal erythropoiesis occur in the bone marrow?
|
Week 28 and onward
|
|
Which ear bone(s) does the 2nd branchial arch form?
|
Stapes
|
|
Does the dorsal root ganglion arise from neural crest (ectoderm), mesoderm, or endoderm?
|
Neural Crest (Ectoderm)
|
|
At what time in the course of development is the fetus most susceptible to teratogens?
|
Weeks 3-8
|
|
What is the female homologue to the prostate gland in the male?
|
Urethral and paraurethral glands (of Skene)
|
|
What fetal landmark has developed within week 2 of fertilization?
|
Bilaminar disk
|
|
What does the right 4th aortic arch give rise to?
|
Proximal part of the right subclavian artery
|
|
What does the 2nd pharyngeal pouch develop into?
|
Epithelial lining of the palantine tonsils
|
|
Do the melanocytes arise from neural crest (ectoderm), mesoderm, or endoderm?
|
Neural Crest (Ectoderm)
|
|
Does the thyroid arise from neural crest (ectoderm), mesoderm, or endoderm?
|
Endoderm
|
|
What three things does the ventral pancreatic bud become?
|
-Pancreatic head-uncinate process-main Pancreatic duct
|
|
What does the thyroid diverticulum arise from?
|
The floor of the primitive pharynx
|
|
What is oligohydramnios associated with?
|
Bilateral renal agenesis or posterior urethral valves (in males)
|
|
What is the acrosome of sperm derived from?
|
Golgi apparatus
|
|
Meiosis I is arrested in which phase until ovulation?
|
Prophase
|
|
What are the rule of 3's for the 3rd week of development?
|
3 germ layers (gastrula): ectoderm, mesoderm, endoderm
|
|
When do primary oocytes complete meiosis I?
|
Just prior to ovulation
|
|
What can be found in the medulla of the thymus?
|
It is pale with mature T cells, epithelial reticular cells, and Hassall's corpuscles
|
|
What does the first branchial cleft develop into?
|
The external auditory meatus
|
|
The stapedius muscle of the ear is formed by which branchial arch?
|
2nd
|
|
Which muscles (3) are derivatives of the 4th branchial arch?
|
-Most pharyngeal constrictors-Cricothyroid-Levator veli palatini
|
|
Where does positive and negative selection occur in the thymus?
|
At the corticomedullary junction
|
|
Does the adrenal cortex arise from neural crest (ectoderm), mesoderm, or endoderm?
|
Mesoderm
|
|
What does the 5th aortic arch give rise to?
|
Nothing
|
|
What teratogenic agent causes limb defects ('flipper' limbs)?
|
Thalidomide
|
|
Which branchial arch are the greater horn of hyoid and the stylopharyngeus muscle derived from?
|
3rd branchial arch
|
|
What does the 3rd aortic arch give rise to?
|
Common carotid artery and proximal part of the internal carotid artery
|
|
What does the umbilical arteries give rise to?
|
Medial umbilical ligaments
|
|
What fetal landmarks (2) have developed within week 3 of fertilization?
|
Primitive streak and neural plate begin to form
|
|
Does the dura connective tissue arise from neural crest (ectoderm), mesoderm, or endoderm?
|
Mesoderm
|
|
What does the ductus arteriosus give rise to?
|
Ligamentum arteriosum
|
|
Does the parathyroid arise from neural crest (ectoderm), mesoderm, or endoderm?
|
Endoderm
|
|
What type of bone formation is spontaneous without preexisting cartilage?
|
Intramembranous
|
|
Does the celiac ganglion arise from neural crest (ectoderm), mesoderm, or endoderm?
|
Neural Crest (Ectoderm)
|
|
Do the odontoblasts arise from neural crest (ectoderm), mesoderm, or endoderm?
|
Neural Crest (Ectoderm)
|
|
Do the parafollicular (C) cells of the thyroid arise from neural crest (ectoderm), mesoderm, or endoderm?
|
Neural Crest (Ectoderm)
|
|
What developmental contributions does the 5th branchial arch make?
|
None
|
|
Which aortic arch does the stapedial artery and the hyoid artery come from?
|
2nd aortic arch
|
|
What is Meckel's diverticulum?
|
Persistence of the vitelline duct or yolk sac
|
|
What are the 3rd branchial arch derivatives innervated by?
|
CN IX
|
|
What embryonic structure does the median umbilical ligament come from?
|
Allantois (urachus)
|
|
What fetal landmark has occurred within week 1 of fertilization?
|
Implantation
|
|
What does the ductus venosus shunt blood away from?
|
Liver
|
|
What can a persistent cervical sinus lead to?
|
A branchial cyst in the neck
|
|
Do the Schwann cells arise from neural crest (ectoderm), mesoderm, or endoderm?
|
Neural Crest (Ectoderm)
|
|
What is the most common congenital anomaly of the GI tract?
|
Meckel's diverticulum
|
|
What effect does 13-cis-retinoic acid have on the fetus?
|
Extremely high risk for birth defects
|
|
Where does spermatogenesis take place?
|
Seminferous tubules
|
|
Is a primary spermatocyte haploid or diploid?
|
Diploid, 4N
|
|
What do the 2nd - 4th branchial clefts form, which are obliterated by proliferation of the 2nd arch mesenchyme?
|
Temporary cervical sinuses
|
|
What three things does the 1st pharyngeal pouch develop into?
|
-Middle ear cavity-Eustachian tube-Mastoid air cells
|
|
What do Brunner's glands secrete?
|
Alkaline mucus
|
|
What are/is the primary secretory product of the zona glomerulosa?
|
Aldosterone
|
|
What is the primary regulatory control of zona fasciculata secretion?
|
ACTH, hypothalamic CRH
|
|
What is the primary regulatory control of zona reticularis secretion?
|
ACTH, hypothalamic CRH
|
|
What is produced by delta cells of the Islets of Langerhans?
|
delta cells produce somatostatin.
|
|
What is the location of zona adherens?
|
Surrounds the perimeter just below zona occludens.
|
|
What three cell types are found in Islets of Langerhans?
|
alpha, beta, and delta cells
|
|
Define Islets of Langerhans.
|
Collections of endocrine cells.
|
|
IN what area of the spleen are B cells found?
|
B cells are found within the white pulp of the spleen.
|
|
What do the Islets of Langerhans arise from?
|
Pancreatic buds.
|
|
What are/is the primary secretory product of the zona fasciculata?
|
Cortisol, sex hormones.
|
|
What does H. pylori predispose to/cause? 2 things
|
Adenocarcinoma of stomach, Malignant Lymphoma
|
|
What is the space of Disse?
|
Pores in liver sinusoids allowing plasma macromolecules access to liver cell surfaces.
|
|
What is the most common organism causes esophagitis?
|
Candida
|
|
Where are Brunner's glands located?
|
Located in submucosa of duodenum
|
|
What is the name of the TEAR of the DISTAL esophagus?
|
Mallory Weiss Sx
|
|
What does it mean when you have dysphagia for solids but not liquids?
|
Mechanical Obstruction
|
|
What is the effect of duodenal ulcers on Brunner's gland histology?
|
Duodenal ulcers cause hypertrophy of Brunner's glands.
|
|
What is the function of liver sinusoids?
|
Allow macromolecules of plasma full access to surface of liver cells through space of Disse.
|
|
When is the pain in duodenal ulcer?
|
Pain decreases with meals
|
|
What must be done with gastric ulcer?
|
Biopsy to rule out gastric cancer
|
|
What part of the stomach is affected by pernicious anemia?
|
Body and Fundus
|
|
What is Zollinger Ellison's Sx?
|
Malignant islet cell tumor
|
|
What is the only GI submucosal gland?
|
Brunner's glands
|
|
What part of the stomach does H. pylori infect?
|
Pyloric Antrum
|
|
Why is myasthemia gravis on the upper esophagus?
|
Upper 1/3 of esophagus is striated muscle
|
|
What are the common signs and symptoms of fistula in pregnancy?
|
Polyhydramnios (excess fluid) fetus is not reabsorbing it through mouth
|
|
What is the most common congenital esophageal disorder?
|
Tracheoesophageal fistula
|
|
What does it mean when you have dysphagia for both solids and liquids?
|
Peristalisis Problem
|
|
What is the pathogenesis of achalasia?
|
Failure of relaxation of LES sphincter
|
|
What is weakness in the esophageal wall called?
|
Zenker's Diverticulum
|
|
What is the name of the RUPTURE of the DISTAL esophagus?
|
Boerhaave's Sx
|
|
What type of gastritis is pernicious anemia?
|
Type A atrophic gastitis
|
|
What is the malignant potential for a duodenal ulcer?
|
0% malignancy, so never biopsied!
|
|
Why is there black melena?
|
Acid acts on HB and converts it into Hematin;Hematin is black pigment that stains fecal matter
|
|
What is a picture of a stomach that is really hard petrified almost?
|
Linitis plastica; Stomach Cancer diffuse type
|
|
What type of cells do you see in linitis plastica?
|
Signet Ring Cells
|
|
Where else can you find signet ring cells?
|
both ovaries since linitis plastica metastasizes via hematogenous route
|
|
What is a kind of diffuse type linitis plastica? attacks the ovaries as well?
|
Krukengerg Tumor
|
|
What is the MC extranodal site of extranodal lymphoma?
|
stomach
|
|
What is the 2nd MC extranodal site of extranodal lymphoma?
|
peyer's patches
|
|
What is the MC benign tumor of GI tract?
|
Leiomyoma
|
|
What is the MC location for Leiomyoma in GI tract?
|
stomach
|
|
What is the main symptom of leiomyoma?
|
bleeding
|
|
What is associated with dermatitis herpetiform?
|
Celiac Dz
|
|
What is the best test to detect Celiac Dz?
|
anti-gliadin Ab
|
|
What is another Dz that involves malabsorption?
|
Whipple Dz
|
|
What is the pathology of Celiac Dz?
|
Atrophy of villi in Duodenum and Jejunum
|
|
What is the pathology of Whipple's Dz?
|
blunting of villi in jejunum and ileum
|
|
What is the best (cheapest) screening test to determine malabsorption problem?
|
stool for fat
|
|
What are the three classifications of diarrhea?
|
1) invasive 2) secretory 3) osmotic
|
|
What is the best test for invasive diarrhea?
|
fecal leukocytes (+)
|
|
What is the #1 organism in invasive enterocolitis?
|
Campylobacter
|
|
What diarrhea's are low volume?
|
Invasive diarrhea
|
|
What diarrhea is high volume?
|
secretory and osmotic
|
|
What is secretory diarrhea?
|
high volume w/ osmolality similar to plasma
|
|
What is osmotic diarrhea?
|
high volume w/ osmolality lower than that of plasma
|
|
What are some disease that cause secretory diarrhea?
|
Vibrio cholerae (via adenylate cyclase); E. coli (via guanylate cyclase); Rotavirus, Carcinoid Sx
|
|
Is there mucosal inflammation in secretory diarrhea?
|
No mucosal inflammation
|
|
What are some common diseases that cause osmotic diarrhea?
|
lactase deficiency; laxatives
|
|
What is the MCC of diarrhea, cholecystitis and pancreatitis in AIDS?
|
Cytomelagolvirus (CMV)
|
|
What is the MCC of diarrhea in AIDS?
|
Cryptosporidium parvum
|
|
What test is used to detect C. parvum?
|
String Test
|
|
What is the MCC of diarrhea from protozoa in the U.S.?
|
Giardia lamblia
|
|
What is the life cycle of G. lamblia?
|
cysts attach to small intestine mucosa
|
|
What organism causes rectal prolapse in children?
|
Trichuris trichura
|
|
What is the Tx of Trichuris trichura?
|
Albendazol
|
|
What is the reservoir of diphyllobothrium latum?
|
fish--- lake trout
|
|
What does D. latum cause?
|
Vitamin B12 deficiency
|
|
What is the Tx fro D. latum?
|
praziquantel
|
|
What is seen in the stool of Strongyloides stercoralis?
|
rhabditiform larvae
|
|
What parasite causes bowel obstruction?
|
Ascaris Lumbricoides
|
|
What parasite in the soil penetrates the skin?
|
Strongyloides stercoralis
|
|
What is the MCC of hematochezia?
|
Diverticulosis
|
|
What is the 2nd MCC of hematochezia?
|
angiodysplasia
|
|
What is associated w/ angiodysplasia?
|
von Willebrand's Dz; Aortic Stenosis
|
|
What is the MCC of iron deficiency in newborn?
|
Mecke's Diverticulum; bleeding GI
|
|
What disease has the term left sided apendicitis?
|
sigmoid diverticula
|
|
MC place of pathology in entire GI tract?
|
Sigmoid colon
|
|
What is associated with embolism of transmural small bowel?
|
heart disease and atrial fibrillation
|
|
What is the MCC of fistulas in the GI tract?
|
diverticula
|
|
What is the MC fistula?
|
Colovesical Fistula
|
|
What layers does UC comprise?
|
musocal and submucosal
|
|
What layers does Cronh's Dz comprise?
|
all layers; it is transmural
|
|
What is involved in Cronh's Dz in 80%?
|
Terminal Ileum Affected
|
|
What segment does UC attack?
|
rectum; does not involve other areas of GI tract
|
|
What is the marker that the patient will recover from HBV?
|
HBV-DNA poymerase leaves before HBsAg
|
|
Markers for HBV infection is active?
|
HBe and HBV-DNA antigens are excellent markers of infectivity
|
|
What marker for HBV determines a chronic carrier?
|
HBsAg for more than 6 months
|
|
What is a healthy carrier?
|
carries HBsAg but is negative for HBeAg/HBV-DNA
|
|
What organism causes spontaneous peritonitis in adults?
|
E. coli
|
|
What organism causes spontaneous peritonitis in children?
|
Step. pneumoniae
|
|
What causes a single abscess in the right lobe of the liver?
|
E. histolytica
|
|
Tx for Hepatic Amebiasis?
|
Metronidazole
|
|
Who is the definitive host of Echinococcosis?
|
Sheep Dog
|
|
Humans are what type of host for Echinococcosis?
|
intermediate host
|
|
Tx for Echinococcosis?
|
Albendazole
|
|
What organism causes cholangiocarcinoma?
|
Clonorchis sinensis
|
|
What is another name for Clonorchis sinensis?
|
Chinese Liver Fluke
|
|
How do you get Clonorchiasis?
|
Ingestion of infected fish w/ larvae
|
|
What is the Tx of Clonorchiasis?
|
Praziquantel
|
|
What is the main characteristic in the laboratory of Clonorchiasis?
|
Eosinophilia
|
|
What organism causes cholangiocarcinoma?
|
Clonorchis sinensis
|
|
What is the main characteristic in the laboratory of Clonorchiasis?
|
Eosinophilia
|
|
What causes portal hypertension, hepatosplenomegaly, ascites and esophageal varices?
|
Schistosomiasis
|
|
What is the definitive host of Schistosoma mansoni?
|
Snails
|
|
Tx for Schistosomiasis?
|
Praziquantel
|
|
What is the MCC of congestive hepatomegaly?
|
Right Heart Failure (H.F.)
|
|
What are two clinical manifestations of PRE-hepatic obstruction?
|
1) portal vein thrombosis 2) ascites/varices
|
|
Do you find hepatomegaly in pre or post-hepatic obstruction?
|
Post-hepatic!!!
|
|
What is a cause of post-hepatic obstruction?
|
1) Budd-Chiari syndrome 2) Polycythemia vera 3) Oral Contraceptives
|
|
What is Budd-Chiari Sx?
|
hepatic vein thrombosis
|
|
What is the MCC of post-hepatic obstruction?
|
Polycythemia vera!
|
|
Symmptoms of post-hepatic obstruction?
|
1) painful liver 2) congested liver 3) ascites 4) portal hypertension
|
|
What are dead hepatocytes called?
|
Councilman Bodies
|
|
When do we find Councilman Bodies?
|
Hepatitis
|
|
What alcoholic disease is irreversible?
|
cirrhosis
|
|
Are fatty change and alcoholic hepatitis reversible or irreversible?
|
reversible
|
|
What are the factors of Alcholo liver disease?
|
1) amount of OH 2) duration of intake 3) more damage in females
|
|
Where is the most important site of metabolism of OH in liver?
|
cytosol
|
|
What causes disulfiram reaction?
|
aldehyde buil up
|
|
What is disulfiram rx?
|
nausea/vomiting, flushing after ingestion of alcohol
|
|
What drug is used in Tx of alcoholism?
|
Antabuse or Disulfiram
|
|
Where is alcohol dehydrogenase found?
|
in cytosol and mitochondria
|
|
Why is there esteatosis?
|
alcohol is converted to acetaldehyde and acetate and acetyl coA which makes free fatty acids - increase in NADH2 favors glycerol-3-p
|
|
What is the sequence to make TG (VLDL) from 1,3 DPG?
|
1,3 DPG to Glyceraldehyde-3-P to DHAP to Glycerol-3-P + FA makes TG
|
|
Why is ketoacidosis sometimes present in alcoholics?
|
NADH once again favors conversion of: Acetoacetate to B-Hydroxybutyrate (ketoacids)
|
|
Why are alcoholics prone to gout?
|
Ketoacids and Lactic Acid compete w/ uric acid for excretion in the kidneys; so Uric Acid Accumulates!
|
|
What is the ratio of ALT and AST in alcoholics?
|
AST > ALT
|
|
What is seen in alcoholic hepatitis?
|
mallory bodies
|
|
What is very characteristic microscopically?
|
fibrosis aroudn terminal hepatic venules
|
|
MCC of obstructive jaundice?
|
stone in common bile duct
|
|
What are the symptoms in obstructive jaundice?
|
-hypercholesterolemia-light colored stools-urine w/conjugated bilirubin-increase alkaline phosphatase (AP) and gamma-glutamyltransferas (GGT)
|
|
What are the symptoms of primary biliary cirrhosis?
|
-pruritus-increase AP and GGT-no jaundice until later
|
|
What immunoglobulins and markers detect primary biliary cirrhosis?
|
-increase anti-mitochrondrial Ab-increase IgM
|
|
How do you acquire primary biliary cirrhosis?
|
autoimmune, granulomatous destruction of bile ducts in triads
|
|
What disease causes primary slcerosing pericholangitis?
|
ulcerative colitis
|
|
What is the clinical picture of Primary sclerosing pericholangitis?
|
jaundice
|
|
What cancer is related to Primary sclerosing pericholangitis?
|
MCC of cholangiocarcinoma
|
|
Name drug that causes acute hepatitis? (4)
|
1) Isoniazid 2) Halothane 3) acetaminophen 4) methyldopa
|
|
Name two drugs that cause cholestasis?
|
1) oral contraceptives 2) anabolic steroids
|
|
What drugs cause steatosis? fatty liver? (2)
|
1) Amiodarone 2) Methotrexate
|
|
What drug causes fibrosis in the liver?
|
methotrexate
|
|
What drug causes angiosarcoma of the liver?
|
Vinyl Chloride
|
|
What drug causes Liver Cell Adenoma?
|
Oral Contraceptives
|
|
What drugs (3) causes hepatocellular carcinoma?
|
1) Vinyl Chloride 2) Aflatoxin (Aspergillus mold) 3) Thorotrast
|
|
Can O.C. cause hepatocellular CA?
|
Yes
|
|
What is fulminant hepatic failure (FHF)?
|
acute liver failure w/ encephalopathy within 8 weeks of hepatic dysfunction
|
|
What is the MCC of FHF? (drug)
|
acetaminophen
|
|
What is the MCC of FHF? (organism)
|
virus
|
|
Other cause of FHF?
|
Reye's Sx
|
|
What is hemochromatosis?
|
unrestricted reabsorption of IRON (small bowel)
|
|
What is the mode of inheritance of hemochromatosis?
|
autosomal recessive
|
|
What are the laboratory findings of hemochromatosis?
|
- increase serum iron - decrease TIBC - increase % saturation - increase serum ferritin
|
|
What is the best screening test of hemochromatosis?
|
increase serum ferritin
|
|
What are the manifestations of hemochromatosis?
|
- bronze skin - pancreas (malabsorption and DM) - restrictive cardiomyopathy - liver anormalities including hepatocellular CA in 30%
|
|
What is the Tx of hemochromatosis?
|
phlebotomy
|
|
What is Wilson's Dz?
|
defect in Copper (Cu+) secretion into bile; - bile is Copper deficient or - defect in synthesis of ceruloplasmin
|
|
What is the Tx of Wilson's Dz?
|
penicillamine
|
|
What nuclei is attacked in Wilson's Dz?
|
lenticular nuclei degeneration
|
|
What are the symptoms of degeneration of the lenticular nuclei?
|
-chorea-rigidity-basal ganglia dementia
|
|
What part of the eye is affected w/ Kayser-Fleischer rings?
|
outer part of decemet; cornea
|
|
What disorder results from a lesion in the medial longitudinal fasciculus (MLF)?
|
Internuclear ophthalmoplegia (INO)
|
|
If you break your medial epicondyle of the humerus, which nerve would likely injure?
|
ulnar nerve
|
|
What lobe of the brain is the principal sensory area in?
|
parietal
|
|
What nerve is known as the great extensor nerve?
|
radial nerve
|
|
What are the functions of the major structures of the inner ear bony labyrinth?
|
1. Cochlea- hearing 2. vestibule- linear acceleration 3. semicircular canals- angular acceleration.
|
|
Which CN is the only nerve that does not abut the wall in the cavernous sinus?
|
CN VI (abducens)
|
|
What CNS/ PNS supportive cell has the following functions: phagocytosis?
|
Microglia
|
|
CN V2 passes through what 'hole'?
|
foramen rotundum
|
|
CN III passes through what 'hole'?
|
superior orbital fissure
|
|
Name the thenar muscles
|
--Opponens pollicis--Abductor pollicis brevis--Flexor pollicis brevis
|
|
The fasciculus cuneatus contains fibers from the upper or lower body?
|
Upper extremities
|
|
Where is the Myenteric plexus located?
|
Between the inner and outer layers of smooth muscle in GI tract wall.
|
|
What gut regions and structures does the celiac artery supply?
|
1.Foregut 2.--Stomach to duodenum --liver --gallbladder --pancreas
|
|
The hippocampus has input from what two areas?
|
Entorhinal cortex and Septal area
|
|
What 3 muscles are lost in a lesion of the musculocutaneous nerve?
|
coracobrachialis, biceps brachii, and brachialis
|
|
What gut regions and structures does the SMA supply?
|
1.Midgut 2.--Duodenum to proximal 2/3 of transverse colon
|
|
Name 2 locations for lesions in Syringomyelia?
|
ventral white commissure and ventral horns
|
|
What layer of the peripheral nerve must be rejoined in microsurgery for limb reattachment?
|
The perineurium must be rejoined in microsurgery for limb reattachment.
|
|
What defect may predispose an infant for a diaphragmatic hernia?
|
Defective development of the pleuroperitoneal membrane
|
|
What 2 symptoms are seen with a lesion of the ulnar nerve?
|
Weak intrinsic muscles of the hand and Pope's blessing
|
|
What bone do all the foramina of the middle cranial fossa pass through?
|
sphenoid bone
|
|
What is a Argyll Robertson pupil?
|
the eyes DO NOT constrict to light, but DO accommodate to near objects
|
|
What are the major structures of the inner ear membranous labyrinth?
|
1. Cochlear duct 2. utricle. 3. saccule 4. semicircular canals.
|
|
Why does the arm hang by the side in Erb-Duchenne palsy?
|
paralysis of shoulder abductors
|
|
CN IX has what 4 functions?
|
posterior 1/3 taste, swallowing, salivation (parotid), monitoring carotid body and sinus
|
|
Which ligament contains the ovarian vessels?
|
Suspensory ligament of the ovary
|
|
What is the consequence when your CNS stimulates the gamma motor neuron and the intrafusal fibers contract?
|
increased sensitivity of the reflex arc
|
|
What structures make up the bronchopulmonary segment?
|
Tertiary bronchus, Bronchial artery, and Pulmonary artery
|
|
The SA and AV nodes are usually supplied by what artery?
|
Right Coronary Artery (RCA)
|
|
Name the 4 foramina that are in the posterior cranial fossa?
|
internal auditory meatus, jugular foramen, hypoglossal canal, and foramen magnum.
|
|
What 3 blood barriers does the body have?
|
blood-brain, blood-gas, blood-testis
|
|
The xiphoid process exists in what dermatome?
|
T7
|
|
What layers of the gut wall contribute to support (3)?
|
--Serosa--Lamina propria--Submucosa
|
|
The Nucleus Ambiguus has fibers from what 3 CNs?
|
CN IX, X, XI
|
|
What 4 structures pass through the jugular foramen?
|
CN IX, X, XI(descending), jugular vein
|
|
What would happen to temperature regulation if you lesioned your ventromedial nucleus of the hypothalamus?
|
have hyperphagia and become obese
|
|
The nipple exists in what dermatome?
|
T4
|
|
What lobe of the brain is the frontal eye movement and pupillary change area in?
|
frontal
|
|
The umbilicus exists in what dermatome?
|
T10
|
|
What are the input and output of the anterior nucleus of the thalamus?
|
input - mammillary body, output - cingulate gyrus
|
|
What is the usual pathology below the pectinate line of the rectum?
|
External hemorrhoids (painful) Squamous cell carcinoma
|
|
What layers of the gut wall contribute to motility (4)?
|
--Muscularis mucosae--Inner circular muscle layer--Myenteric plexus--Outer longitudinal muscle layer
|
|
Brodmann's area 4 is?
|
principal motor area
|
|
What are 3 clinical findings of the arm in Erb-Duchenne palsy?
|
arm hangs by the side, medially rotated, forearm is pronated
|
|
What muscle elevates and intorts the eye?
|
superior rectus
|
|
What is the function of Submucosal plexus?
|
Regulates local secretions, blood flow, and absorption.
|
|
What is the venous drainage difference above and below the pectinate line?
|
--Superior rectal v. to internal mesenteric vein to portal system (Above)--inferior rectal v. to internal pudendal v. to internal iliac v. to IVC (Below)
|
|
What reflex is lost in a lesion of the musculocutaneous nerve?
|
biceps reflex
|
|
What structure passes through the foramen rotundum?
|
CN V2
|
|
What 3 structures pass through the foramen magnum?
|
spinal roots of CN XI(ascending), brainstem, vertebral arteries
|
|
What structures are in the carotid sheath?
|
Internal Jugular Vein (lateral), Common Carotid Artery (medial) and Vagus Nerve (posterior)
|
|
What is the arterial blood supply difference above and below the pectinate line?
|
--Superior rectal a. (Above)--inferior rectal a. (Below)
|
|
Common peroneal, Tibial, Femoral, and Obturator nerves arise from what spinal cord segments (4 answers)?
|
--'L4-S2 (common peroneal) --L4-S3 (tibial) --L2-L4 (femoral) and (obturator)
|
|
A lesion of the Striatum can cause which 2 diseases?
|
Huntington's and Wilson's disease
|
|
A lesion of the right optic tract produces?
|
left homonymous hemianopsia
|
|
An aneurysm of what artery may cause CN III palsy?
|
posterior communicating artery
|
|
Which meningeal layer is not pierced during an LP?
|
Pia mater
|
|
Bell's Palsy is seen as a complication in what 5 things?
|
AIDS, Lyme disease, Sarcoidosis, Tumors, Diabetes (ALexander Bell with STD)
|
|
Which way does the uvula deviate in a unilateral lesion (LMN) of CN X? (toward or away)
|
away from the lesion
|
|
Brodmann's area 44, 45 is?
|
Broca's area (motor speech)
|
|
Brodmann's area 3,1,2 is?
|
principal sensory area
|
|
Brodmann's area 8 is?
|
frontal eye movement and pupilary change area
|
|
CN IV passes through what 'hole'?
|
superior orbital fissure
|
|
What two bones do all the foramina of the posterior cranial fossa pass through?
|
temporal and occipital bones
|
|
CN III has what 4 functions?
|
eye movement, pupil constriction, accommodation, eyelid opening
|
|
What lobe of the brain is the Broca's area in?
|
frontal
|
|
Brodmann's area 17 is?
|
principal visual cortex
|
|
What 5 types of cells make up the suportive cells of the CNS/PNS?
|
Astrocytes, Microglia, Oligodendroglia, Schwann cells, Ependymal cells.
|
|
CN VII has what 4 functions?
|
facial movement, anterior 2/3 taste, lacrimation, salivation(SL, SM glands)
|
|
Brodmann's area 41, 42 is?
|
primary auditory cortex
|
|
CN X passes through what 'hole'?
|
jugular foramen
|
|
CN VIII passes through what 'hole'?
|
internal auditory meatus
|
|
What nerve innervates the muscles that close and open the jaw?
|
Trigeminal Nerve (V3)
|
|
CN XII passes through what 'hole'?
|
hypoglossal canal
|
|
What muscle sensor senses tension and provides inhibitory feedback to alpha motor neurons?
|
golgi tendon organs
|
|
What is Endoneurium?
|
Endoneurium invests single nerve fiber of the peripheral nerve.
|
|
What syndrome is seen with a lesion of the long thoracic nerve?
|
Winged scapula
|
|
Give 4 characteristics of an UMN lesion.
|
spastic paralysis, increased deep tendon reflexes, + Babinski, minor to no atrophy
|
|
What CNS/ PNS supportive cell has the following functions: physical support, repair, K+ metabolism?
|
Astrocytes
|
|
What structures do the broad ligament contain (4)?
|
Round ligaments of the uterus, Ovaries, Uterine tubules and Uterine vessels
|
|
The Blood-Brain Barrier is formed by what 3 structures?
|
Choriod Plexus Epithelium, Intracerebral Capillary Endothelium, Astrocytes
|
|
Which thalamic nucleus has the function of body senses(proprioception, pressure, pain, touch, vibration)?
|
Ventral Posterior Lateral Nucleus (VPL)
|
|
Which way does the jaw deviate in a unilateral lesion (LMN) of CN V? (toward or away)
|
toward the lesion
|
|
What are the 4 classic findings of Brown-Sequard syndrome?
|
ipsi motor paralysis(spastic), ipsi loss of dorsal column, contra loss of spinothalamic, ipsi loss of ALL sensation at the level of the lesion
|
|
How does the hypothalamus control the adenohypophysis?
|
via releasing factors (ie. TRH, CRF, GnRF, etc.)
|
|
How does the course of the left recurrent laryngeal nerve differ from that of the right?
|
The left wraps around the arch of the aorta and the ligamentum arteriosum while the right wraps around the subclavian artery.
|
|
Which thalamic nucleus has the function of facial sensation and pain?
|
Ventral Posterior Medial Nucleus (VPM)
|
|
A lesion of the right optic nerve produces?
|
right anopsia
|
|
What is the course of the ureters?
|
Pass under uterine artery and under the ductus deferens
|
|
What 3 muscles are lost in a lesion of the radial nerve?
|
triceps brachii, brachioradialis, and extensor carpi radialis longus
|
|
Traction or tear of the superior trunk of the brachial plexus causes what syndrome?
|
Erb-Duchenne palsy (waiter's tip)
|
|
The central retinal artery is a branch off what larger artery?
|
Ophthalmic Artery
|
|
What is the innervation difference above and below the pectinate line?
|
--Visceral innervation (Above)--Somatic innervation (Below)
|
|
The fasciculus gracilis contains fibers from the upper or lower body?
|
Lower extremities
|
|
What nerve innervates most of the 'palat' muscles and which is the exception?
|
All muscles with root 'palat' in their names (except tensor veli palatini, innervated by V2) are innervated by vagus nerve.
|
|
What syndrome is seen with a lesion of the lower trunk of the brachial plexus?
|
Claw hand
|
|
Name two proteins involved in the structure of zona adherens?
|
1. E-cadherins 2. actin filaments
|
|
Golgi tendon organs send their signal via what nerve?
|
group Ib afferents
|
|
A pudendal nerve block is performed at what landmark?
|
Ischial spine
|
|
What is the function of Myenteric plexus?
|
Coordinates motility along entire gut wall.
|
|
The male sexual response of ejaculation is mediated by what part of the nervous system?
|
Visceral and somatic nerves
|
|
What is the Myenteric plexus also known as?
|
Auerbach's plexus
|
|
Subarachnoid space extends to what spinal level?
|
S2
|
|
What part of the spinal cord is spared with complete occlusion of the ventral artery?
|
dorsal columns
|
|
What structure passes through the foramen ovale?
|
CN V3
|
|
What artery supplies the medial surface of the brain (foot-leg area)?
|
anterior cerebral artery
|
|
What passes through the cavernous sinus? (nerves and artery)
|
CN III, IV, V1, V2, VI, post-ganglionic SNS and the Internal carotid artery
|
|
What syndrome is seen with a lesion of the posterior cord of the brachial plexus?
|
Wrist drop
|
|
Where is the CSF found?
|
Subarachnoid space
|
|
Which way does the tongue deviate in a unilateral lesion (LMN) of CN XII? (toward or away)
|
toward the lesion
|
|
What artery supplies Broca's and Wernicke's speech areas?
|
middle cerebral artery
|
|
What 5 spinal nerves make up the brachial plexus?
|
C5, C6, C7, C8, T1
|
|
CN I passes through what 'hole'?
|
cribriform plate
|
|
Which way does the head deviate in a unilateral lesion (LMN) of CN XI? (toward or away)
|
toward the lesion
|
|
What is the pectinate line of the rectum?
|
Where the hindgut meets ectoderm in the rectum
|
|
Where is the lesion in a patient with hemiballismus?
|
Subthalamic nucleus
|
|
Obturator nerve damage manifests what deficit?
|
Loss of hip adduction
|
|
What are the input and output of the mammillary body?
|
input - hippocampal formation, output - anterior nucleus of the thalamus
|
|
The male sexual response of erection is mediated by what part of the nervous system?
|
Parasympathetic nervous system
|
|
CN II passes through what 'hole'?
|
optic canal
|
|
Which thalamic nucleus has a visual function?
|
Lateral Geniculate Nucleus (LGB)
|
|
What is the name for the small muscle fiber type that regulates muscle length?
|
Intrafusal fibers
|
|
What 2 cutaneus nerves are lost in a lesion of the radial nerve?
|
Posterior brachial cutaneous and posterior antebrachial cutaneous
|
|
What vagal nuclei controls motor innervation to the pharynx, larynx, and upper esophagus?
|
Nucleus Ambiguus (Motor=aMbiguus)
|
|
What muscle fiber type makes up the muscle bulk and provides the force for contraction?
|
Extrafusal fibers
|
|
What lobe of the brain is the Wernicke's area in?
|
temporal
|
|
What symptom is seen with a lesion of the median nerve?
|
decreased thumb function
|
|
What muscle extorts, elevates, and adducts the eye?
|
inferior oblique
|
|
A lesion of the right visual fibers just prior to the visual cortex produces?
|
left hemianopsia with macular sparing
|
|
Which ligament contains the uterine vessels?
|
Transverse cervical (cardinal) ligament
|
|
From which 3 spinal roots does long thoracic nerve arises?
|
C5, C6, C7
|
|
CN IX passes through what 'hole'?
|
jugular foramen
|
|
Vertigo, ataxia, visual deficits, and coma are caused by stroke of the? (ant. circle or post. circle)
|
Posterior circle
|
|
What is affected in a central VII lesion (lesion above the facial nucleus - UMN)?
|
paralysis of the contralateral lower quadrant
|
|
What 4 areas is there decreased output in Parkinson's?
|
substantia nigra pars compacta, globus pallidus, ventral anterior nucleus, cortex
|
|
Where in the inner ear are the ampullae found? What is the function of this structure?
|
Semicircular canals contain ampullae. Functions in detecting angular acceleration.
|
|
General sensory/motor dysfunction and aphasia are caused by stroke of the? (ant. circle or post. circle)
|
anterior circle
|
|
What symptom is seen with a lesion of the axillary nerve?
|
Deltoid paralysis
|
|
What lesion produces sensory(fluent/receptive) aphasia with poor comprehension?
|
Wernicke's area (associative auditory cortex)
|
|
What is the membranous labyrinth filled with? Describe its composition.
|
The membranous labyrinth is filled with endolymph. Endolymph is K+ rich, similar to ICF.
|
|
What is a hiatal hernia?
|
Stomach contents herniate upward through the esophageal hiatus of the diaphragm
|
|
What 2 spinal roots make up the superior trunk of the brachial plexus?
|
C5, C6
|
|
Name the type of movement with sudden, jerky, purposeless movements?
|
Chorea
|
|
Give 3 charateristics of internuclear ophthalmoplegia (INO)
|
medial rectus palsy on lateral gaze, nystagmus in abducted eye, normal convergence.
|
|
What 4 movements are impaired in a lesion of the ulnar nerve?
|
wrist flexion, wrist adduction, thumb adduction, and adduction of the 2 ulnar fingers
|
|
Name the type of movement with sudden, wild flailing of one arm?
|
Hemiballismus
|
|
CN XI passes through what 'hole'?
|
jugular foramen (descending) -- foramen magnum (ascending)
|
|
In a lesion of the radial nerve, what muscle is associated with wrist drop?
|
extensor carpi radialis longus
|
|
Name two proteins involved in the structure of macula adherens.
|
1. Desmoplakin 2.Keratin
|
|
Intrafusal fibers are innervated by what motor neuron?
|
gamma motor neuron
|
|
What type of lesion is seen in Multiple Sclerosis?
|
random asymmetric lesions in mostly white matter of the cervical region
|
|
Who usually gets a direct inguinal hernia? indirect hernia (and why)?
|
1.Older men 2.Infants (failure of processus vaginalis to close)
|
|
If you break your surgical neck of the humerus, which nerve would likely injure?
|
axillary nerve
|
|
Give 3 characteristics of a LMN lesion.
|
atrophy, flaccid paralysis, absent deep tendon reflexes
|
|
How are the fibers of the spinothalmic tract laminated? (sacral/cervical medial or lateral?)
|
cervical-medial, sacral-lateral
|
|
If you break your supracondyle of the humerus, which nerve would likely injure?
|
median nerve
|
|
Brodmann's area 22 is?
|
Wernicke's area (associative auditory cortex)
|
|
If you break your humerus mid-shaft, which nerve would likely injure?
|
radial nerve
|
|
What neurons do the GI enteric plexus contain?
|
Cell bodies of parasympathetic terminal effector neurons
|
|
Brodmann's area 6 is?
|
premotor area
|
|
The spinal cord ends at what level in adults?
|
L1-L2
|
|
What lesion produces coma?
|
reticular activating system
|
|
What artery do the lateral striate branch off of?
|
internal carotid artery
|
|
What artery does the anterior spinal artery branch off of?
|
vertebral artery
|
|
What lesion produces personality changes and deficits in concentration, orientation, judgement?
|
frontal lobe - these are frontal release signs
|
|
What 4 movements are lost in a lesion of the median nerve?
|
forearm pronation, wrist flexion, finger flexion, and several thumb movements
|
|
Which thalamic nucleus has an auditory function?
|
Medial Geniculate Nucleus (MGB)
|
|
The infraorbital nerve is a branch off what larger nerve?
|
CN V2
|
|
What lesion produces spatial neglect syndrome?
|
right parietal lobe -- contralateral neglect.
|
|
What are the input and output of the entorhinal cortex?
|
input - cingulate gyrus, output - hippocampal formation
|
|
What 5 structures pass through the superior orbital fissure?
|
CN III, IV, V-1, VI, ophthalmic vein
|
|
What are the 2 classic causes of Erb-Duchenne palsy?
|
blow to the shoulder and trauma during birth
|
|
What are the input and output of the cingulate gyrus?
|
input - anterior nucleus of the thalamus, output - entorhinal cortex
|
|
Horner's Syndrome is present if the lesion in Brown-Sequard is above what level?
|
T1
|
|
CN III inervates what 5 muscles.
|
medial rectus, superior rectus, inferior rectus, inferior oblique, levator palpebrae superioris
|
|
What artery does the superior cerebellar artery branch off of?
|
basilar artery
|
|
What lesion produces Kluver-Bucy syndrome (hyperorality, hypersexuality, disinhibited behavior)?
|
Amygdala (bilateral)
|
|
An aneurysm of the anterior communicating artery may cause what type of defects?
|
visual defects
|
|
What part of pancreas are the Islets of Langerhans concentrated?
|
Islets of Langerhans are most numerous in the tail of pancreas.
|
|
Name five portal-systemic anastomoses.
|
Left gastric-azygous vv. Superior-Middle/Inferior rectal vv. Paraumbilical-inferior epigastric Retroperitoneal-renal vv. Retroperitoneal-paravertebral vv.
|
|
Extrafusal fibers are innervated by what motor neuron?
|
alpha motor neuron
|
|
What type of lesion is seen in Amyotrophic Lateral Sclerosis?
|
combo of UMN and LMN lesions with no sensory deficit
|
|
If the radial nerve is lesioned, what 2 reflexes are lost?
|
triceps reflex and brachioradialis reflex
|
|
A lesion of the right Meyer's loop (temporal lobe) produces?
|
left upper quadrantic anopsia (a temporal lesion)
|
|
Beginning with anterior communicating artery describe the path around the circle of Willis.
|
ant. comm. - ACA - ICA - post. comm. - PCA - PCA - post. comm. - ICA - ACA - ant. comm.
|
|
What lobe of the brain is the principal motor area in?
|
frontal
|
|
Where is the Submucosal plexus located?
|
Between mucosa and inner layer of smooth muscle in GI tract wall.
|
|
Abnormal passive abduction of the knee indicates damage to what structure?
|
Medial collateral ligament(MCL)
|
|
What muscle depresses and extorts the eye?
|
inferior rectus
|
|
What happens if a swinging light test is performed on a Marcus Gann pupil (afferent pupil defect)?
|
results in pupil dialation of the defective eye as the light is swung from the normal eye to the defective eye
|
|
What three muscles close the jaw?
|
Masseter, Temporalis, and Medial pterygoid
|
|
What syndrome is seen with a lesion of the radial nerve?
|
Saturday night palsy
|
|
What is the course of an indirect inguinal hernia?
|
Through the internal (deep) inguinal ring and the external (superficial) inguinal ring lateral to the inferior epigastric artery and into the scrotum
|
|
What structures perforate the diaphragm at what vertebral levels?
|
IVC at T8, Esophagus and Vagal trunks at T10, and Aorta, Thoracic duct, and Axygous vein at T12 ?I 8 10 Eggs At 12?
|
|
What are the input and output of the septal area?
|
input - hippocampal formation, output - hippocampal formation
|
|
What vagal nuclei controls visceral sensory in formation like taste and gut distention?
|
Nucleus Solitarius (Sensory=Solitarius)
|
|
Where is the lesion in Parkinson's?
|
Substantia nigra pars compacta
|
|
What would happen to temperature regulation if you lesioned your posterior hypothalamus?
|
lose the ability to conserve heat
|
|
How do glucose and amino acids cross the blood-brain barrier?
|
carrier-mediated transport mechanism
|
|
CN VI passes through what 'hole'?
|
superior orbital fissure
|
|
Intrafusal fibers are encapsulated and make up muscle spindles that send their signal via what nerve?
|
group Ia afferents
|
|
What CN is the efferent limb of the pupillary light reflex?
|
CN III
|
|
What CN arises dorsally?
|
CN IV trochlear
|
|
The male sexual response of emission is mediated by what part of the nervous system?
|
Sympathetic nervous system
|
|
Which thalamic nucleus is the primary motor cortex?
|
Ventral Lateral Nucleus (VL)
|
|
Which CNs pass through the middle cranial fossa?
|
CN II - VI
|
|
What CNS/ PNS supportive cell has the following functions: peripheral myelin production?
|
Schwann cells
|
|
The inguinal ligament exists in what dermatome?
|
L1
|
|
What is a diaphragmatic hernia?
|
Abdominal retroperitoneal structures enter the thorax
|
|
The hippocampal formation is connected to the mammillary body and septal area via what structure?
|
Fornix
|
|
What CNS/ PNS supportive cell has the following functions: inner lining of the ventricles?
|
Ependymal cells
|
|
What CNS/ PNS supportive cell has the following functions: central myelin production?
|
Oligodendroglia
|
|
A lesion of the globus pallidus causes what disease?
|
Wilson's disease
|
|
What makes endolymph?
|
Endolymph is made by the stria vascularis.
|
|
CN X has what 5 functions?
|
taste, swallowing, palate elevation, talking, thoracoabdominal viscera
|
|
What CNs lie medially at the brain stem?
|
CN III, VI, XII (3 - 6 - 12)
|
|
What do the medullary cords consist of?
|
Closely packed lymphocytes and plasma cells.
|
|
What 1 nerve root is assoc. with the biceps reflex?
|
C5
|
|
What 1 nerve root is assoc. with the achilles reflex?
|
S1
|
|
What are the major structures of the inner ear bony labyrinth?
|
1. Cochlea 2. vestibule 3. semicircular canals
|
|
What muscle opens the jaw?
|
Lateral pterygoid
|
|
Which CNs pass through the posterior cranial fossa?
|
CN VII - XII
|
|
Name 3 locations for lesions in Vit.B12 neuropathy(Friedreich's ataxia)?
|
dorsal columns, lateral corticospinal tracts, and spinocerebellar tracts
|
|
What are the 3 layers of peripheral nerves? (inner to outer)
|
Endoneurium, Perineurium and Epineurium
|
|
CN XI has what 2 functions?
|
head turning, shoulder shrugging
|
|
Neurons from the striatum have what action on the globus pallidus?
|
Inhibitory
|
|
Which thalamic nucleus has pre-motor function?
|
Ventral Anterior Nucleus (VA)
|
|
Erection and sensation of the penis is in what dermatomes?
|
S2-S4
|
|
Visual fibers from the lateral geniculate body terminate on the upper and lower banks of what fissure?
|
Calcarine fissure
|
|
What structure is in the femoral triangle but not in the femoral sheath?
|
The Femoral nerve
|
|
What 3 structures pass through the optic canal?
|
CN II, ophthalmic artery, central retinal vein
|
|
Neurons from the globus pallidus have what action on the ventral anterior nucleus?
|
Inhibitory
|
|
What lesion produces conduction aphasia, poor repetition w/ poor comprehension, and fluent speech?
|
Arcuate fasiculus
|
|
Name the type of movement with slow writhing movements (esp. the fingers)?
|
Athetosis
|
|
Which part of the cochlea picks up high frequency sound? Which picks up low frequency?
|
The base of the cochlea picks up high frequency sound the apex picks up low frequency sound
|
|
What lobe of the brain is the premotor area in?
|
frontal
|
|
What gut regions and structures does the IMA supply?
|
1.Hindgut 2.--Distal 1/3 of transverse colon to upper portion of rectum
|
|
A lesion of the optic chiasm produces?
|
bitemporal hemianopsia
|
|
Name the hypothenar muscles.
|
--Opponens digiti minimi--Abductor digiti minimi--Flexor digiti minimi
|
|
What 1 nerve root is assoc. with the triceps reflex?
|
C7
|
|
What 2 spinal roots make up the inferior trunk of the brachial plexus?
|
C8, T1
|
|
What vagal nuclei sends parasympathetic fibers to the heart, lungs, and upper GI?
|
dorsal motor nucleus of CN X
|
|
What are 2 characteristics of Tabes Dorsalis?
|
impaired proprioception and locomotor ataxia
|
|
Name the 5 segments of the brachial plexus in order from proximal to distal.
|
roots - trunks - divisions - cords - branches
|
|
A lesion of the right dorsal optic radiation (parietal lesion) produces?
|
left lower quadrantic anopsia (a temporal lesion)
|
|
What structure passes through the foramen spinosum?
|
middle meningeal artery
|
|
A common football injury caused by clipping from the lateral side will damage what structures (3 answers)?
|
--Medial collateral ligament--Lateral meniscus--Anterior cruciate ligament
|
|
Where in the inner ear are the maculae found? What is the function of this structure?
|
The utricle and saccule contain maculae Functions in detecting linear acceleration.
|
|
A lesion of the mammillary bodies (bilateraly) produces what?
|
Wernicke-Korsakoff's encephalopathy (confabulations, anterograde amnesia)
|
|
What is the function of hair cells?
|
Hair cells are the sensory elements in both the cochlear and vestibular apparatus.
|
|
The hippocampus has output to what two areas?
|
Mammillary body and Septal area
|
|
What type of lesion is seen in Werdnig-Hoffmann disease and is it genetic or acquired?
|
genetic LMN lesion causing flaccid paralysis (aka. Floppy infant disease)
|
|
The embryologic defect of having a cervical rib can compress what 2 structures?
|
Subclavian artery and Inferior trunk of the brachial plexus
|
|
The kneecaps exist in what dermatome?
|
L4
|
|
Name the 4 ligaments of the uterus.
|
--Suspensory ligament of ovaries--Transverse cervical (cardinal) ligament--Round ligament of Uterus--Broad ligament
|
|
The Nucleus Solitarius has fibers from what 3 CNs?
|
CN VII, IX, X
|
|
What lobe of the brain is the principal visual cortex area in?
|
occipital
|
|
What is Epineurium?
|
Epineurium (dense connective tissue) surrounds entire nerve (fascicles and blood vessels)
|
|
What is the bony labyrinth filled with? Describe its composition.
|
The bony labyrinth is filled with perilymph. Perilymph is Na+ rich, similar to ECF
|
|
What 2 symptoms are seen with a lesion of the musculocutaneus nerve?
|
Difficulty flexing the arm and Variable sensory loss
|
|
Describe the outer structure of a Peyer's patch.
|
A Peyer's patch is 'covered' by single layer of cuboidal enterocytes, interspersed with specialized M cells (no goblet cells).
|
|
What muscle intorts, depresses, and abducts the eye?
|
superior oblique
|
|
A lumbar puncture is performed at what landmark?
|
Iliac crest
|
|
The recurrent laryngeal nerve arises from what cranial nerve and supplies what muscles?
|
1.CN X 2.All intrinsic muscles of the larynx except the cricothyroid muscle.
|
|
What spinal cord levels are vertebral disk herniation most likely to occur?
|
Between L5 and S1
|
|
What artery does the anterior inferior cerebellar artery branch off of?
|
basilar artery
|
|
What artery does the posterior inferior cerebellar artery branch off of?
|
vertebral artery
|
|
What 1 nerve root is assoc. with the patella reflex?
|
L4
|
|
CN V1 passes through what 'hole'?
|
superior orbital fissure
|
|
What 4 'muscles' does the radial nerve innervate?
|
Brachioradialis, Extensors of the wrist and fingers, Supinator, Triceps. (BEST)
|
|
What nerve innervates most of the 'glossus' muscles and which is the exception?
|
All muscles with root 'glossus' in their names (except palatoglossus, innervated by vagus nerve) are innervated by hypoglossal nerve.
|
|
What muscular disorder is a medial longitudinal fasciculus syndrome associated with?
|
Multiple Sclerosis (MLF=MS)
|
|
Femoral nerve damage manifests what deficit?
|
Loss of knee jerk
|
|
Name the 5 foramina that are in the middle cranial fossa?
|
optic canal, superior orbital fissure, foramen rotundum, foramen ovale, and foramen spinosum.
|
|
What structures are pierced when doing an LP?
|
1.Skin/superficial fascia 2.Ligaments 3.Epidural space 4.Dura mater 5.Subdural space 6.Arachnoid 7.Subarachnoid space--CSF
|
|
How are the fibers of the corticospinal tract laminated? (legs/arms medial or lateral?)
|
arms- medial, legs-lateral
|
|
CN V3 passes through what 'hole'?
|
foramen ovale
|
|
What 4 things do the lateral striate arteries supply?
|
internal capsule, caudate, putamen, globus pallidus
|
|
Why is the forearm pronated in Erb-Duchenne palsy?
|
loss of the biceps brachii
|
|
What is the most common circle of Willis aneurysm?
|
anterior communicating artery
|
|
What kind of placenta do Siamese twins have?
|
Monochorionic Monoamniotic planceta
|
|
What are 4 substances contained within the lysosomes of neutrophils?
|
Hydrolytic enzymes, Lysozyme, Myeloperoxidase, Lactoferrin
|
|
Which malaria is associated with nephrotic syndrome?
|
P. malariae
|
|
What is the most common malaria?
|
Vivax
|
|
Which malaria is the most lethal?
|
Falciparum
|
|
What are 4 characteristics of the plasma cell morphology?
|
Off center nucleus, Clock face chromatin distribution, Abundant RER, and Well developed Golgi apparatus
|
|
What is the histologic change in lymph nodes during an extreme cellular immune response?
|
Lymph node paracortex becomes enlarged during extreme cellular immune response.
|
|
What are the steps of maturation of a B cell? (2 points)
|
Maturation in the marrow and Migration to peripheral lymphoid tissue
|
|
What is the function of lymph node follicles?
|
Site of B-cell localization and proliferation.
|
|
What is percentage of leukocytes in the blood exist as basophils?
|
less than 1%
|
|
What specialized vascular structure is found in the lymph node paracortex? What is the function of this structure?
|
Paracortex contains high endothelial venules (HEV). T and B cells enter from the blood through the HEV.
|
|
What drug do you use for resistant falciparum?
|
Mefloquine
|
|
What does CD stand for?
|
cluster of differentiation
|
|
What are 3 morphological characteristics of monocytes?
|
Large, Kidney-shaped nucleus and Extensive 'frosted glass' cytoplasm
|
|
In what area of the spleen are T cells found?
|
T cells are found in the PALS and the red pulp of the spleen.
|
|
What are 4 morphologic characteristics of lymphocytes?
|
Round, Small, Densely staining nucleus, and Small amount of pale cytoplasm
|
|
What is the histologic presentation of DiGeorge's syndrome?
|
Lymph node paracortex is not well developed in patients with DiGeorge's syndrome.
|
|
What are the components of the air-blood barrier?
|
Type I pneumocyte, Endothelial cell, and Their fused basement membrane.
|
|
What percentage of leukocytes exist as neutrophils in the blood?
|
40 - 75%
|
|
What leukemia has gum infiltration?
|
Acute Monocytic Leukemia (M5)
|
|
What is the age distribution of all leukemias?
|
ALL (0-14) AML (15-39) AML (40-60) CML (40-60) CLL (>60 years old)
|
|
What are the substances contained within the densely basophilic granules of the basophil? (4)
|
-Heparin (anticoagulant)-histamine (vasodilator)-vasoactive amines-Slow reacting substance of anaphylaxis
|
|
How do you treat falciparum malaria infection?
|
IV quinidine or quinine plus doxycycline
|
|
What are two important functions of a neutrophil?
|
Acute inflammmatory response of a cell and Phagocytosis
|
|
What kind of cells are found nearby the sinusoids of the spleen?
|
Macrophages
|
|
What are two basic morphological characteristics of neutrophils?
|
-multilobed nucleus-large,spherical azurophilic primary granules (lysosomes)
|
|
What do medullary sinuses consist of?
|
Medullary sinuses contain reticular cells and macrophages.
|
|
What cells are found in the lymph node paracortex?
|
Paracortex houses T cells.
|
|
What are the major structures of the lymph node medulla?
|
Medulla consists of medullary cords and medullary sinuses.
|
|
What are two names for an increased number of red cells?
|
Erythrocytosis and Polycythemia
|
|
Gout or Pseudogout? How do you tell?
|
Positively Birefringement (Blue color) Pseudogout; Negatively Birefringement (Yellow color) Gout
|
|
What is the basic morphologic structure of an erythrocyte?
|
Anucleate, biconcave
|
|
What do medullary sinuses communicate with?
|
Medullary sinuses communicate with efferent lymphatics.
|
|
Describe the histologic structure of sinusoids of the spleen.
|
Long, vascular channels in red pulp. With fenestrated 'barrel hoop' basement membrane.
|
|
What is the importance of the physiologic chloride shift in erythrocytes?
|
Membranes contain the chloride bicarbonate antiport allowing the RBC to transport carbon dioxide from the the lung periphery for elimination.
|
|
What is the frequency of acute leukemias?
|
Acute Myelogenous Leukemia (M2) 30-40% Acute Promyelocytic (M3) 5-10%, Acute Monocytic (M5) 10%
|
|
What is the treatment for all malarias except falciparum?
|
Chloroquine plus primaquine
|
|
What is the prophylaxis treatment for malaria?
|
Chloroquine
|
|
What percentage of leukocytes exist as eosinophils in the blood?
|
1 - 6%
|
|
What is the basic morphology of an eosinophil? (2 things)
|
Bilobate nucleus and Packed with large eosinophilic granules of uniform size
|
|
Describe the location of the lymph node paracortex.
|
Region of cortex between follicles and medulla.
|
|
What leukemia is associated with ABL protooncogene?
|
Chronic Myelogenous Leukemia (CML)
|
|
What percentage of leukocytes in blood are monocytes?
|
2 - 10%
|
|
What does the African variant involve? (Burkitt's)
|
Jaw
|
|
What does the American variant involve? (Burkitt's)
|
GI, ovaries and retroperitoneum
|
|
What do you see in Burkitt's?
|
Starry Sky Apparence
|
|
What is the Starry Sky?
|
macrophages w/ phagocytosed apoptotic bodies
|
|
What are the characteristic cells in Hodgkin's Lymjphoma?
|
association w/ EBV; cutaneous anergy to common antigens
|
|
What are the cells of Hogkin's L. called?
|
Reed-Sternberg Cells
|
|
What are Reed-Sternberg Cells?
|
transformed germinal center B cells
|
|
What CD maker's do you use to detect RS cells?
|
CD15 and CD30; you got to be able to REED by 15 and 30
|
|
What does a classic RS cell look like?
|
two mirror image nuclei w/ eosinophilic nucleolus surrounded by a clear halo
|
|
What is elevated in vWF disease?
|
Elevated Bleeding Time (platelet adh. Problem) aPTT increased
|
|
What is elevated on hemophilia A?
|
VIII deficient aPTT increased (intrinsic pathway)
|
|
What is elevated in a person taking aspirin?
|
Bleeding Time elevated
|
|
What is elevated in Idiopathic Thrombocytogenic Purpura? Decreased?
|
Bleeding Time increased platelets decreased
|
|
What are two other diseases that has Bleed Time increased and decreased platelets?
|
Thrombotic Thrombocytopenic Purpura , Hemolytic Uremic Syndrome
|
|
What factor involved in extrinsic pathway?
|
VII
|
|
What factor involved in intrinsic pathway?
|
XII, XI, IX, VIII
|
|
What is the best test for vWF diases?
|
ristocetin cofactor assay
|
|
What anti bodies does blood group O have?
|
anti A-IgM, anti B-IgM, anti AB- IgG
|
|
What anti bodies have blood A?
|
anti B
|
|
What does group B has?
|
anti A-IgM
|
|
What does group AB has?
|
nothing, just like new borns and old people
|
|
What blood group has greatest incidence of gastric carcinoma?
|
group A
|
|
What is associated w/ duodenal ulcer?
|
group O blood
|
|
Who is the universal donor?
|
Group O
|
|
Who is the universal acceptor?
|
AB no antibodies to attack those cells
|
|
What Protoconcogene (POC) is associated w/ osteogenic sarcoma?
|
SIS
|
|
What POC is associated w/ Leukemia?
|
RAS
|
|
What POC is associated w/ Breast CA?
|
ERB-B2
|
|
What POC is associated w/ Astrocytoma?
|
SIS
|
|
What POC is associated w/ Neuroblastoma?
|
N-MYC
|
|
What POC is associated w/ lung CA?
|
RAS
|
|
What POC is associated w/ CML?
|
ABL
|
|
What POC is associated w/ Burkitt's Lymphoma?
|
C-MYC, MYC
|
|
What POC is associated w/ colon CA?
|
RAS
|
|
What POC is associated w/ MEN IIa/IIb Syndromes?
|
RET
|
|
What POC is associated w/ pancreatic CA?
|
RAS
|
|
What function does SIS have?
|
GF synthesis, (Growth Factor)
|
|
What fx does ERB-B2 has?
|
Receptor Synthesis
|
|
What fx does ABL has?
|
Non-receptor TK activity
|
|
What fx does RET have?
|
Receptor Synthesis
|
|
What fx does MYC have?
|
Nuclear Transcription
|
|
What fx does N-MYC have?
|
Nuclear transcription
|
|
What fx does RAS has?
|
GTP signal transduction
|
|
What two POC have the same function of Receptor Synthesis?
|
ERB-B2 and RET
|
|
What two POC have the same fx of nuclear transcription?
|
c-MYC and N-MYC
|
|
What does SIS activate by?
|
Overexpression
|
|
What does ERB-B2 activate by?
|
Amplification
|
|
What does RET Activate by?
|
Point Mutation
|
|
What does RAS activate by?
|
Point Mutation
|
|
What does ABL activate by?
|
translocation t(9;22)
|
|
What does MYC activate by?
|
c-MYC translocation t(8;14)
|
|
What does N-MYC activate by?
|
Amplification
|
|
What two POC amplify by?
|
ERB-B2 and N-MYC
|
|
What two POC activate by point mutation?
|
RET and RAS
|
|
What two POC activate by translocation?
|
ABL and c-MYC
|
|
What virus is associated w/ SIS POC and w/ Osteogenic Sarcoma?
|
EBV
|
|
What POC amplifies breasts??? imagine that...
|
ERB-B2
|
|
What are the inactivation of suppressor genes?
|
TP53, RB, APC and BRCA1/2
|
|
What suppressor gene (SG) is associated w/ lung, colon, breast and Li-Fraumeni syndrome?
|
TP53
|
|
What SG is associated w/ breast, ovary and prostate CA?
|
BRCA 1, BRCA 2
|
|
What SG is associated w/ familial polyposis: color cancer?
|
APC
|
|
What suppressor gene is associated w/ retinoblastoma, osteogenic sarcoma and breast CA?
|
RB
|
|
What is the function of TP53?
|
G1 to S phase inhibitor
|
|
What is the function of BRCA 1/2 gene?
|
Regulates DNA repair
|
|
What is the APC gene function?
|
Prevents nuclear transcription, - degrades catenin; an activator of nuclear transcription
|
|
What is the function of RB gene?
|
G1 to S phase inhibitor
|
|
What are the genes of anti-apoptosis?
|
BCL-2 genes
|
|
What is the function of BCL-2 genes?
|
prevents the leakage of cytochrome c (signal for apoptosis)
|
|
What disease is associated with BCL-2?
|
b-cell lymphoma, Follicular Lymphoma t14;18
|
|
What is another disease that involves TP53?
|
Ataxia Telangiectasia, susceptibility to malignant lymphoma
|
|
What virus is associated w/ TP53?
|
HBV and HTLV-1(T cell leukemia and lymphoma), HPV 16,18 HPV16 inhibits TP53, RB inhibited by HPV 18
|
|
What CA manifests w/ ADH increase? What do you find clinically?
|
SCC of lung, Hyponatremia
|
|
What carcinogen is implicated with pancreatic adenocarcinoma, SCC of oropharynx and upper/mid esophagus?
|
Alcohol
|
|
What carcinogen is implicated with stomach AdenoCA?
|
nitrosamines and nitrosamides
|
|
What carcinogen is implicated with colorectal cancer?
|
Lithocholic acid and Secondary bile acid
|
|
What carcinogen is implicated with Lung CA? (4)
|
Uranium, Asbestos, Chromium, and Nickel
|
|
What carcinogen is implicated with pleural mesothelioma?
|
Asbestos
|
|
What carcinogen is implicated with breast cancer and cervical cancer?
|
Oral Contraceptives
|
|
What carcinogen is implicated with SCC of skin, lung CA, liver angiosacroma?
|
Arsenic
|
|
What carcinogen is implicated with TCC of bladder? (2)
|
cyclophosphamide and b-naphthylamine (dye and rubber indus.)
|
|
What carcinogen is implicated with acute leukemia?
|
benzene
|
|
What carcinogen is implicated with SCC of penis?
|
Smegma in uncircumcised male
|
|
What carcinogen is implicated with SCC of scrotum?
|
tar, soot, oil (chimney sweeper)
|
|
What carcinogen is implicated with malignant lymphoma?
|
Alkylating agents
|
|
What is the most common risk factor for BCC, SCC, melanoma?
|
UVB light
|
|
What is the most common risk factor for Kaposi's Sacroma?
|
HHV-8
|
|
What is the most common risk factor for Nasopharyngela CA?
|
EBV
|
|
What is the most common risk factor for larynx CA?
|
polycyclic HOC (hydrocarbons)
|
|
What is the most common risk factor for distal esophagus?
|
barret's disease
|
|
What is the most common risk factor for Stomach AdenoCA?
|
Helicobacter pylori
|
|
What is the most common risk factor for Colon adenoCA?
|
preexisting polyps and tubular and villous adenoma
|
|
What is the most common risk factor for pancreas?
|
polycyclic HOC
|
|
What is the most common risk factor for hepatocellular CA?
|
HBV or HCV cirrhosis
|
|
What is the most common risk factor for seminoma?
|
cryptorchid testis, semi-descended testis, and seminoma
|
|
What is the most common risk factor for breast CA?
|
Age >50, excess estrogen: 1) nulliparity 2) early menarche 3) late menopause 4) obesity
|
|
What is the most common risk factor for dysgerminoma/gonadoblastoma?
|
Turner Sx XO dysgerminoma XO/XY gonadoblastoma
|
|
What is the most common risk factor for surface derived ovarian CA?
|
nulliparity because of increase of ovulatory cycles
|
|
What is the most common risk factor for choriocarcinoma?
|
Complete Hydatidiform Mole
|
|
What is the most common risk factor for Malignant lymphoma thyroid?
|
Hashimoto's Thyroiditis
|
|
What is the most common risk factor for papillary CA of thyroid?
|
Ionization Radiation
|
|
What is the most common risk factor for medullary CA thyroid?
|
MEN IIa/IIb
|
|
What is the most common risk factor for osteogenic sarcoma?
|
retinoblastoma radiation
|
|
What is the most common risk factor for Primary CNS lymphoma?
|
EBV in AIDS pat.
|
|
What is the most common risk factor for Burkitt's Lymphoma?
|
EBV
|
|
What activates the alternative complement pathway?
|
Microbe surface molecules (especially endotoxin)
|
|
What drug prevents mast cell degranulation?
|
Cromolyn sodium
|
|
What is the primary function of a basophil?
|
Mediates allergic reactions
|
|
What activates the classic complement pathway?
|
IgG and IgM GM makes classic cars
|
|
What releases Interferon gamma
|
Th1 cells (emphasized) and NK cells
|
|
What are released from the process of degranulation in mast cells?
|
Release of histamine, heparin, and eosinophil chemotactic factors
|
|
What is the most abundant type of Ig?
|
IgG
|
|
Innate immunity vs adaptive immunity: How are receptors that recognize pathogens encoded?
|
Innate: Germline encoded Adaptive: Undergo VDJ recombination during development
|
|
What is the primary phagocytic cell in acute inflammation?
|
Neutrophil
|
|
What cell contains myeloperoxidase and lysozyme?
|
Neutrophil
|
|
What percentage of T cells which enter thymus survive?
|
2%
|
|
What is MHC and what codes for it?
|
Major Histocompatability Complex encoded by Human Leukocyte Antigen (HLA)
|
|
What is an M cell? What is it's function.
|
Specialized cell interspersed between the cuboidal enterocytes covering a Peyer's patch. M cells take up antigens.
|
|
Name 2 substances produced by an eosinophil.
|
histamine and arylsulfatase
|
|
Innate immunity vs adaptive immunity: How fast is response to pathogens?
|
Innate: Always fast, no memory response. Adaptive: Slow on 1st exposure but memory response is faster and more robust.
|
|
What does the right lymphatic duct drain?
|
Right arm and right half of head
|
|
What is a Peyer's patch?
|
Unencapsulated lymphoid tissue found in lamina propria and submucosa of small intestine.
|
|
What does the thoracic duct drain?
|
Everything except for the right arm and the right half of head
|
|
What cell is the major mediator of the allergic response?
|
Basophil
|
|
What are 3 examples of peripheral lymphoid tissue?
|
Follicles of lymph nodes, White pulp of spleen, and Unencapsulated lymphoid tissue
|
|
What are the two types of helper T cells and where do they differentiate?
|
In the lymph node, helper T cells differentiate into Th1 cells, and Th2 cells.
|
|
What are 4 types of cells into which T cells differentiate?
|
Cytotoxic T cells (MHC I, CD8) , Helper T cells (MHCII, CD4) , Suppressor T cells , Delayed hypersensitivity T cells
|
|
What releases Tumor Necrosis Factor alpha
|
Macrophages (emphasized) and Th1 cells
|
|
What is the response of an eosiniphil to antigen antibody complexes?
|
high degree of phagocytosis
|
|
What is negative selection of T cells?
|
Destruction of T-cells that react to self-antigen
|
|
What substance in eosinophilic granules is mainly responsible for defense against helminths and protozoan?
|
Major Basic Protein
|
|
What is the function of Interferon gamma with relation to macrophages?
|
Macrophage activation
|
|
Where do positive and negative selection of T-cells occur in the thymus?
|
At the corticomedullary junction
|
|
MHC I and II: Where in the cell is antigen loaded onto the MHC?
|
I: RER (mostly intracellular peptides) II: Acidified endosome
|
|
What is positive selection of T cells?
|
Retention of T cells that have functioning T cell receptors
|
|
Into what cell type does a monocyte differentiate in tissues?
|
macrophages
|
|
What is the type of cell necessary for transplant rejection?
|
T cell
|
|
What releases Interleukin 2?
|
Th Cells
|
|
What is the function and chemical composition of bacterial structure: Plasma Membrane
|
Function: Site of oxidative and transport enzymes Chemical composition: Lipoprotein bilayer
|
|
Special culture requirements for: Neisseria gonorrhoeae
|
Thayer-Martin media
|
|
What is the function of IgA proteases?
|
Function: Allow some organisms to colonize mucosal surfaces
|
|
Which heat-stable lipopolysaccharide (LPS) is found in the cell wall of gram-negative bacteria?
|
Endotoxin
|
|
What is the function and chemical composition of bacterial structure: Capsule
|
Function: Protects against phagocytosis Chemical composition: Polysaccharide (except Bacillus anthracis which contains D-glutamate)
|
|
What is the function and chemical composition of bacterial structure: Cell Wall/Cell Membrane
|
Gram positives only Function: Major surface antigen Chemical composition: Teichoic acid, which induces TNF and IL-1
|
|
What does the capsule of Bacillus anthracis consist of?
|
D-glutamate
|
|
What is the mechanism of superantigens?
|
1. Bind directly to MHC II and T cell receptor 2. Large numbers of T cells are activated. 3. Stimulates release of IFN-gamma and IL-2
|
|
Which molecule, unique to the bacterial cell wall, provides rigid support and resistance against osmotic pressure?
|
Peptidoglycan
|
|
Which cell membrane structure is unique to gram-positive organisms?
|
Teichoic acid
|
|
What is the function and chemical composition of bacterial structure: Peptidoglycan
|
Function: Rigid support and Protects against osmotic pressure Chemical composition: Sugar backbone with cross-linked peptide side chains
|
|
List of bugs that release superantigens
|
1. Staphylococcus aureus 2. Streptococcus pyogenes
|
|
What is the function and chemical composition of bacterial structure: Plasmid
|
Function: Contains a variety of genes for antibiotic resistance, enzymes, and toxins Chemical composition: DNA
|
|
What is the function and chemical composition of bacterial structure: Spore
|
Function: Provides resistance to dehydration, heat, and chemicals Chemical composition: Keratin-like coat and dipicolinic acid
|
|
What is the function and chemical composition of bacterial structure: Flagellium
|
Function: Motility Chemical composition: Protein
|
|
What is the function and chemical composition of bacterial structure: Glycocalyx
|
Function: Mediates adherence to surfaces, especially foreign surfaces (eg indwelling catheters) Chemical composition: Polysaccharide
|
|
Which bacteria have IgA proteases?
|
1. Streptococcus pneumoniae 2. Neisseria meningitidis 3. Neisseria gonorrheae 4. Hemophilus influenzae
|
|
Why does the following bug not gram stain well?: Treponema
|
Too thin to be visualized
|
|
Why does the following bug not gram stain well?: Rickettsia
|
Intracellular parasite
|
|
Why does the following bug not gram stain well?: Mycobacteria
|
high-lipid-content cell wall
|
|
Why does the following bug not gram stain well?: Mycoplasma
|
No cell wall
|
|
Why does the following bug not gram stain well?: Legionella pneumophila
|
Primarily intracellular
|
|
Why does the following bug not gram stain well?: Chlamydia
|
Intracellular parasite which lacks muramic acid in cell wall
|
|
How is the following bug visualized?: Treponema
|
1. Darkfield microscopy 2. Fluorescent antibody staining 3. silver stain
|
|
What to know about exotoxins released by Clostridium tetani
|
Blocks the release of inhibitory neurotransmitter glycine from Renshaw cells in the spinal cord. Causes ""lockjaw""
|
|
What to know about exotoxins released by Bacillus anthracis
|
1 toxin in the toxin complex is edema factor, an adenylate cyclase
|
|
What to know about exotoxins released by Shigella
|
Shiga toxin (also produced by E.coli 0157:H7). Cleaves host cell rRNA. Also enhances cytokine release causing hemolytic uremic syndrome.
|
|
Endotoxin: What is it and where is it found?
|
Lipopolysaccharide found in the outer membrane of gram-negative bacteria. Heat stable.
|
|
Endotoxin: What does it activate and what do they release?
|
1. Macrophages (IL-1, TNF, Nitric oxide) 2. Alternative complement pathway (C3a, C5a) 3. Hageman factor (Coagulation cascade)
|
|
What mediators are released when endotoxin activates macrophages, and what do they do?
|
1. IL-1: Fever 2. TNF: Fever and Hemorrhagic tissue necrosis 3. Nitric Oxide: Hypotension (shock)
|
|
What mediators are released when endotoxin activates the alternative complement cascade, and what do they do?
|
1. C3a: Hypotension and edema 2. C5a: Neutrophil chemotaxis
|
|
What mediators are released when endotoxin activates Hageman factor, and what do they do?
|
Coagulation cascade: Disseminated intravascular coagulopathy
|
|
What method is used to differentiate Neisseria?
|
Sugar fermentation
|
|
What do meningococci ferment?
|
MeninGococci ferment Maltose and Glucose
|
|
What do gonococci ferment?
|
Gonococci ferments Glucose
|
|
What are the pigment producing bacteria and what pigments do they produce?
|
Staphylococcus aureus: Yellow pigment; Pseudomonas aeruginosa: blue-green pigment; Serratia marcescens: red pigment
|
|
Special culture requirements for: Hemophilus influenzae
|
Chocolate agar with factors V (NAD) and X (hematin)
|
|
Special culture requirements for: Neisseria gonorrhoeae
|
Thayer-Martin media
|
|
Special culture requirements for: Bordetella pertussis
|
Bordet-Gengou (potato) agar
|
|
Special culture requirements for: M. tuberculosis
|
Lowenstein-Jensen agar
|
|
Special culture requirements for: Lactose-fermenting enteric bacteria
|
Pink colonies on MacConkey's agar
|
|
Special culture requirements for: Legionella
|
Charcoal yeast extract agar buffered with increased iron and cysteine
|
|
Special culture requirements for: Fungi
|
Sabouraud's agar
|
|
What microbes can be stained with: Congo red
|
Amyloid. Apple-green birefringence in polarized light (because of beta-pleated sheets)
|
|
What microbes can be stained with: Giemsa's
|
1. Borrelia 2. Plasmodium 3. Trypanosomes 4. Chlamydia
|
|
What microbes can be stained with: periodic acid-Schiff (PAS)
|
Glycogen and mucopolysaccharides. Used to diagnose Whipple's disease
|
|
What microbes can be stained with: Ziehl-Neelsen
|
Acid-fast bacteria.
|
|
What microbes can be stained with: India ink
|
Cryptococcus neoformans
|
|
What microbes can be stained with: Silver stain
|
1. Fungi 2. PCP (Pneumocystis Pneumonia) 3. Legionella 4. Treponema
|
|
Name 4 lysogenic toxins.
|
BCDE 1. Botulinum 2. Cholera 3. Diphtheria 4. Erythrogenic toxin of Streptococcus Pyogenes
|
|
List four obligate aerobes.
|
Nocardia, Pseudomonas aeruginosa, Mycobacterium tuberculosis, Bacillus
|
|
What conditions occur concurrently with P. Aeruginosa infection?
|
1. Burn wounds 2. Nosocomial pneumonia 3. Pneumonias in Cystic Fibrosis patients
|
|
List 3 obligate anaerobes
|
Clostridium, Bacteroides, and Actinomyces
|
|
What enzymes do obligate anaerobes lack?
|
Catalase (aka glutathione peroxidase) AND/OR Superoxide dismutase (converts O2-radical[ie superoxide] to H2O2)
|
|
Why are anaerobes foul-smelling?
|
They produce short-chain fatty acids.
|
|
What do anaerobes produce in tissue?
|
CO2 and H2 gases
|
|
Where are anaerobes normal flora?
|
1. GI tract 2. Between teeth and gums
|
|
List the obligate intracellular bacteria.
|
Rickettsia and Chlamydia.
|
|
What is the defining characteristic of obligate intracellular bacteria.
|
Can't make their own ATP.
|
|
List the facultative intracellular bacteria.
|
Salmonella, Neisseria, Brucella, Mycobacterium, Listeria, Francisella, Legionella, Yersinia
|
|
List four major examples of encapsulated bacteria
|
1. Streptococcus pneumoniae 2. Hemophilus influenzae (especially B serotype) 3. Neisseria meningitidis 4. Klebsiella pneumoniae
|
|
What does a positive quellung reaction indicate?
|
Positive quellung: If encapsulated bug is present, capsule swells when specific anticapsular antisera are added.
|
|
In which vaccines does the capsule serve as an antigen?
|
Pneumovax, H influenzae B, Meningococcal vaccines
|
|
What does conjugation with protein do to vaccines that have a capsular antigen?
|
Increases the immunogenicity and T-cell dependent responce.
|
|
Which bacteria form spores?
|
Gram positive soil bugs (eg Bacillus anthracis, Clostridium perfringens, Clostridium tetani)
|
|
How can one destroy spores?
|
Autoclave (as is done to surgical equipment)
|
|
Which bacteria are alpha hemolytic?
|
Streptococcus (all catalase-negative)
|
|
Which bacteria are beta-hemolytic?
|
Rods: Listeria monocytogenes Cocci:If catalase positive and coagulase positive: Staphylococcus Aureus, If catalase negative, Streptococcus.
|
|
What are the important points about Listeria monocytogenes?
|
1. Tumbling motility 2. Meningitis in newborns 3. Unpasteurized milk
|
|
Gram positive: Which are catalase positive and which are catalase negative?
|
Positive: Staph Negative: Strep
|
|
Gram positive: Which are catalase positive bacteria make coagulase?
|
Staph aureus does. Staph epidermidis and saprophyticus do not.
|
|
Which antibody enhances host defenses against Streptococcus Pyogenes?
|
Antibody to M protein
|
|
Antibody to M protein enhances host defenses against what?
|
Streptococcus Pyogenes
|
|
What does ASO titer detect?
|
Recent S. Pyogenes infection
|
|
How can one detect recent S. Pyogenes infection?
|
ASO titer
|
|
What are the signs and symptoms of rheumatic fever?
|
1. Subcutaneous nodules 2. Polyarthritis 3. Erythema marginatum 4. Chorea 5. Carditis (bacterial endocarditis)
|
|
What drug resistances do the enterococci show?
|
1. Penicillin G 2. Ampicillin 3. Vancomycin
|
|
What is Lancefield grouping determined by?
|
Differences in the C carbohydrate on the bacterial cell wall
|
|
Which Group D bacteria are hardier?
|
Enterococci are hardier than nonenterococci. They can grow in 6.5% NaCl
|
|
A colony of bacteria grows in 6.5% NaCl. What is it?
|
Enterococcus
|
|
What disease states/problems does Staphylococcus epidermidis cause?
|
Infection of prosthetic devices and catheters. Contaminates blood cultures.
|
|
How is Streptococcus Viridans characterized?
|
1. Alpha hemolysis 2. Optochin resistant 3. Normal mouth flora
|
|
Where is Strep. Viridans part of the normal flora?
|
Oropharynx
|
|
What disease states/problems does Streptococcus Viridans cause?
|
1. Dental caries (Streptococcus mutans) 2. Subacute Bacterial endocarditis (Streptococcus Sanguis)
|
|
How are clostridia characterized?
|
1. Gram positive rods 2. Spore forming 3. Obligate anaerobes
|
|
What disease state does Clostridium difficile cause?
|
pseudomembranous colitis secondary to clindamycin or ampicillin use. (Mnemonic: DIfficile causes Diarrhea)
|
|
Treatment for C. difficile infection
|
Metronidazole
|
|
Lab diagnosis basis for Cornyebacterium diphtheriae
|
Gram positive rods with metachromatic granules, grown on tellurite agar (aka Loffler's coagulated serum medium)
|
|
How is Bacillus anthracis characterized?
|
1. Gram positive rod 2. Spore forming 3. Protein capsule
|
|
Which bacteria have a protein capsule?
|
Bacillus anthracis (the only one)
|
|
What are the mechanisms of anthrax infection?
|
1. Non-inhalation contact with bacillus anthracis 2. Formation of malignant pustule (painless ulcer) 3. Progression to bacteremia 4. Death
|
|
What organism: Development of flulike symptoms followed by fever, pulmonary hemorrhage and shock.
|
Inhalation anthrax: Bacillus anthracis
|
|
What do skin lesions in anthrax look like?
|
Vesicular papules covered by black eschar
|
|
What is Woolsorter's disease
|
Inhalation of Bacillus anthracis spores from contaminated wool
|
|
What organism: Gram-positive rods forming long branching filaments resembling fungi
|
Actinomyces israelii or Nocardia asteroides
|
|
What organism: Oral or facial abscesses with yellow granules in sinus tracts
|
Actinomyces israelii
|
|
What disease state does Actinomyces israelii cause?
|
Oral or facial abscesses with yellow granules draining out skin through sinus tracts
|
|
How is Actinomyces israelii characterised?
|
Gram-positive anaerobic rods forming long branching filaments resembling fungi (Nocardia also has this description)
|
|
How is Nocardia asteroides characterized?
|
Gram-positive (weakly acid fast) rods forming long branching filaments resembling fungi (Actinomyces also has this description)
|
|
What disease state does Nocardia asteroides cause?
|
Pulmonary infection in immunocompromised patients
|
|
What is the treatment for Actinomyces israelii?
|
Penicillin
|
|
What is the treatment for Nocardia Asteroides?
|
Sulfonamides
|
|
What bacteria genus can live in neutrophils?
|
Neisseria
|
|
Gonococcus and meningococcus: Polysaccharide capsule
|
G: No M: Yes
|
|
Gonococcus and meningococcus: Maltose fermentation
|
G: No (Gonococcus ferments Glucose) M: Yes (MeninGococcus ferments Maltose and Glucose)
|
|
Gonococcus and meningococcus: Vaccine availability
|
G: No M: Yes
|
|
What disease states does Gonococcus cause?
|
1. Gonorrhea 2. septic arthritis 3. neonatal conjunctivitis 4. PID
|
|
What disease states does Meningococcus cause?
|
1. Meningococcemia 2. Meningitis 3. Waterhouse-Friderichsen syndrome
|
|
What disease states does Haemophilus Influenzae cause?
|
1. Epiglottitis 2. Meningitis 3. Otitis media 4. Pneumonia
|
|
How is Haemophilus Influenzae characterized?
|
Small gram-negative coccoid rod.
|
|
How is Haemophilus Influenzae transmitted?
|
Aerosol
|
|
Which type of Haemophilus Influenzae is most pathogenic?
|
capsular type B
|
|
Treatment for Haemophilus Influenzae meningitis
|
Ceftriaxone
|
|
Prophylaxis for Hemophilus Influenzae
|
Vaccine:Type B polysaccharide conjugated to diphtheria toxoid. Given between 2 and 18 months of age. Close contacts of infected person: Rifampin
|
|
What disease states does Klebsiella cause?
|
1. Pneumonia in alcoholics and diabetics (In the name: Klebsiella pneumoniae) 2. Nosocomial UTIs (large mucoid capsule and viscous colonies)
|
|
Signs and symptoms of Klebsiella infection
|
1. Red currant jelly sputum 2. Abscess in lungs
|
|
Orange sputum: What bugs?
|
1. Pneumococcus 2. Klebsiella (or described as ""red currant jelly sputum"")
|
|
Salmonella vs. Shigella: Lactose fermenter?
|
Neither
|
|
Salmonella vs. Shigella: Motile
|
Both (Though, the evidence that shigella is motile is recent.) Can invade and disseminate hematogenously.
|
|
Salmonella vs. Shigella: Animal reservoir
|
Salmonella: Yes Shigella: No
|
|
Shigella transmission
|
4 Fs:1. Food 2. Fingers 3. Feces 4. Flies
|
|
Salmonella vs. Shigella: Virulence
|
Salmonella: 100,000 organisms Shigella: 10 organisms
|
|
True or False: Salmonellosis symptoms may be prolonged with antibiotic treatments
|
TRUE
|
|
What type of inflammatory response is seen in Salmonellosis?
|
Monocytes
|
|
Transmission of Yersinia enterocolitica
|
1. Pet feces (eg puppies) 2. Contaminated milk or pork
|
|
Yersinia enterocolitica infection: Clinical presentation
|
1. Outbreaks are common in day-care centers 2. Can mimic Crohn's or appendicitis
|
|
What bug causes contamination of this food: Seafood
|
Vibrio: 1. parahaemolyticus 2. vulnificus
|
|
What bug causes contamination of this food: Reheated rice
|
Bacillus cereus
|
|
What bug causes contamination of this food: Mayonnaise
|
Staphylococcus Aureus (starts quickly and ends quickly)
|
|
What bug causes contamination of this food: Custard
|
Staphylococcus Aureus (starts quickly and ends quickly)
|
|
What bug causes contamination of this food: Reheated meat
|
Clostridium perfringens
|
|
Bloody or watery diarrhea: Vibrio parahaemolyticus
|
Either bloody or watery
|
|
Bloody or watery diarrhea: Campylobacter
|
Bloody
|
|
Bloody or watery diarrhea: Salmonella
|
Bloody
|
|
Bloody or watery diarrhea: Shigella
|
Bloody
|
|
Bloody or watery diarrhea: Enterohemorrhagic E. coli
|
Bloody
|
|
Bloody or watery diarrhea: Enteroinvasive E. coli
|
Bloody
|
|
Bloody or watery diarrhea: Yersinia enterocolitica
|
Bloody
|
|
Bloody or watery diarrhea: C. difficile
|
Bloody
|
|
Bloody or watery diarrhea: Entamoeba histolytica
|
Bloody
|
|
Bloody or watery diarrhea: Enterotoxigenic E. coli
|
Watery
|
|
Bloody or watery diarrhea: Vibrio cholerae
|
Watery
|
|
Bloody or watery diarrhea: C. perfringens
|
Watery
|
|
Bloody or watery diarrhea: Protozoa
|
Watery
|
|
Bloody or watery diarrhea: Viruses
|
Watery
|
|
Diagnosis: Bloody diarrhea with oxidase-positive comma or S-shaped organisms grown at 42 degrees celsius
|
Campylobacter
|
|
Diagnosis: Bloody diarrhea with motile, lactose negative gram negative bugs
|
Salmonella or Shigella
|
|
Diagnosis: Bloody diarrhea with schistocytes and azotemia
|
Enterohemorrhagic E coli (eg O157:H7) Caused by shiga-like toxin
|
|
Diagnosis: Bloody diarrhea with hemolytic uremic syndrome
|
Enterohemorrhagic E coli (eg O157:H7) Caused by shiga-like toxin
|
|
Diagnosis: Bloody diarrhea with pathologic section revealing bacteria invading colonic mucosa
|
Enteroinvasive E. coli
|
|
Diagnosis: Bloody diarrhea with symptoms of appendicitis
|
Yersinia enterocolitica
|
|
Diagnosis: Bloody diarrhea in a day care center
|
Yersinia enterocolitica
|
|
Diagnosis: Bloody diarrhea with pseudomembranous colitis
|
Clostridium dificile
|
|
Diagnosis: Bloody diarrhea with protozoans
|
Entamoeba histolytica
|
|
Diagnosis: Watery diarrhea in someone who just visited Mexico
|
Enterotoxigenic E coli (no preformed toxin)
|
|
Diagnosis: Watery diarrhea with comma-shaped organisms
|
Vibrio cholerae
|
|
Diagnosis: Watery diarrhea with gangrenous leg
|
Clostridium perfringens
|
|
Diagnosis: Watery diarrhea in an immunocompromised patient
|
Protozoa (eg Giardia or Cryptosporidium)
|
|
Diagnosis: Watery diarrhea
|
Think viruses first. Rotavirus Adenovirus Norwalk virus
|
|
Difference between mechanisms of cholera and pertussis toxins
|
Cholera: Permanently activates Gs (turns the "on" on) Pertussis: Permanently disables GI (turns the "off"" ff)
|
|
What is edema factor?
|
A toxin in the Bacillus Anthracis exotoxin complex that functions as adenylyl cyclase
|
|
Disease states caused by Legionella (list only)
|
1. Asymptomatic infection 2. Pontiac fever 3. Legionnaires disease
|
|
Describe Pontiac fever
|
Caused by Legionella. Presents like influenza. Strikes suddenly and completely resolves in one week.
|
|
Describe Legionnaires' disease
|
Very high fever with severe pneumonia
|
|
Treatment for Legionella
|
Has a beta-lacatamase (penicillin-resistant) 1. Erythromycin 2. Rifampin
|
|
Diagnosis: Pneumonia in a smoker >50 years of age. Gram stain of pus shows many neutrophils with few microbes.
|
Legionella
|
|
Legionella: Gram stain
|
Gram negative. Gram stains poorly (use silver stain)
|
|
Legionella: How is it transmitted?
|
Aerosol transmission from environmental water sources (AC, Showers, whirlpools, cooling towers, supermarket produce mist)
|
|
Sexuality of fungal spores
|
Asexual (mostly)
|
|
Which fungal infections are transmitted by inhalation of asexual spores?
|
1. Coccidioidomycosis 2. Histoplasmosis
|
|
What are conidia?
|
Asexual fungal spores
|
|
Treatment for Candida Albicans infection
|
Superficial: Nystatin Serious systemic: Amphotericin B
|
|
Histologic appearance of Candida Albicans
|
Budding yeast with pseudohyphae in culture at 20 degrees celsius Germ tube formation at 37 degrees celsius
|
|
Which fungus causes thrush in immunocompromised
|
Candida albicans
|
|
Which fungus causes vulvovaginitis?
|
Candida albicans (high pH, diabetes, use of antibiotics)
|
|
Which fungus is endemic to Southwestern US?
|
Coccidioidomycosis
|
|
Which fungus is endemic to Mississippi and Ohio river valleys
|
Histoplasmosis
|
|
What fungus is this area known for: Southern Ohio
|
Histoplasmosis
|
|
What fungus is this area known for: Southern Illinois
|
Histoplasmosis
|
|
What fungus is this area known for: Missouri
|
Histoplasmosis
|
|
What fungus is this area known for: Kentucky
|
Histoplasmosis
|
|
What fungus is this area known for: Tennessee
|
Histoplasmosis
|
|
What fungus is this area known for: Arkansas
|
Histoplasmosis
|
|
What fungus is this area known for: Southern California
|
Coccidiomycosis
|
|
What fungus is this area known for: Southern Arizona
|
Coccidiomycosis
|
|
What fungus is this area known for: Mississippi river valley
|
Histoplasmosis (also Blastomycosis)
|
|
What fungus is this area known for: Ohio river valley
|
Histoplasmosis (also Blastomycosis)
|
|
What fungus is this area known for: Southwestern US
|
Coccidiomycosis
|
|
What fungus is this area known for: Rural Latin America
|
Paracoccidioidomycosis
|
|
What fungus is this area known for: Wisconsin
|
Blastomycosis
|
|
What fungus is this area known for: Minnesota
|
Blastomycosis
|
|
Characterize histoplasmosis histologically
|
Tiny yeast inside macrophages. Thin cell wall with no true capsule.
|
|
What is the vector for histoplasmosis?
|
Bird or bat droppings
|
|
What do bird and bat droppings carry?
|
Histoplasmosis
|
|
What characterizes dimorphic fungi?
|
Mold in soil (lower temperature) and yeast in tissue (body temperature)
|
|
List the dimorphic fungi
|
Histoplasmosis, Blastomycosis, and Paracoccidioidomycosis (but not coccidioidomycosis which is a spherule in tissue)
|
|
Treatment for coccidiomycosis
|
Local: Fluconazole or ketoconazole Systemic: Amphotericin B
|
|
Treatment for paracoccidiomycosis
|
Local: Fluconazole or ketoconazole Systemic: Amphotericin B
|
|
Treatment for Histoplasmosis
|
Local: Fluconazole or ketoconazole Systemic: Amphotericin B
|
|
Treatment for Blastomycosis
|
Local: Fluconazole or ketoconazole Systemic: Amphotericin B
|
|
What is cultured on Sabouraud's agar?
|
Fungi (specifically dimorphic fungi)
|
|
What disease state does Malassezia furfur cause?
|
Tinea versicolor: Hypopigmented skin lesions which occur in hot humid weather.
|
|
Treatment for Tinea versicolor
|
Topical miconazole or selenium sulfide (Selsun)
|
|
What resembles spaghetti and meatballs histologically?
|
combination of mycelium strands and numerous spores of Malassezia furfur in KOH prep
|
|
What disease state does Cladosporium werneckii cause?
|
Tinea nigra: Infection of keratinized layer of skin. Appears as brownish spot.
|
|
What causes Tinea versicolor?
|
Malassezia furfur
|
|
What causes Tinea nigra?
|
Cladosporium werneckii
|
|
Treatment for Tinea nigra
|
topical salicylic acid
|
|
What are the common dermatophytes and what do they cause?
|
Microsporum, Trichophyton, and Epidermophyton cause all the tineas except for versicolor and nigra
|
|
What causes Tinea corporis?
|
Dermatophytes (such as Microsporum, Trichophyton, and Epidermophyton)
|
|
What causes Tinea cruris?
|
Dermatophytes (such as Microsporum, Trichophyton, and Epidermophyton)
|
|
What causes Tinea pedis?
|
Dermatophytes (such as Microsporum, Trichophyton, and Epidermophyton)
|
|
What causes Tinea capitis?
|
Dermatophytes (such as Microsporum, Trichophyton, and Epidermophyton)
|
|
What causes Tinea unguium?
|
AKA Tinea onychomycosis. Dermatophytes (such as Microsporum, Trichophyton, and Epidermophyton)
|
|
What causes Tinea onychomycosis?
|
AKA Tinea unguium. Dermatophytes (such as Microsporum, Trichophyton, and Epidermophyton)
|
|
How does Tinea corporis present?
|
Ring shape with a red raised border
|
|
How does Tinea cruris present?
|
AKA jock itch. Itchy red patches on groin and scrotum
|
|
How does Tinea unguium/onychomycosis present?
|
Nails are thickened discolored and brittle
|
|
Treatment for dermatophyte infection
|
1. Topical imidazoles 2. Oral griseofulvin (Tinea capitus and tinea unguium)
|
|
What causes a fungus ball?
|
Aspergillus
|
|
What disease states does Aspergillus cause?
|
1. Allergic bronchopulmonary aspergillosis 2. Lung cavity aspergilloma 3. Invasive aspergillosis
|
|
Histologic appearance of aspergillus
|
Mold (not dimorphic) with septate hyphae that branch at a V-shaped (45 degree) angle). Rare fruiting bodies.
|
|
What disease states does cryptococcus neoformans cause?
|
1. Cryptococcal meningitis 2. Cryptococcosis
|
|
Histologic appearance of cryptococcus neoformans
|
5-10 micrometer yeasts with wide capsular halo. Narrow based unequal budding.
|
|
How is cryptococcus neoformans stained?
|
1. India ink 2. Latex agglutination test for polysaccharide capsular antigen
|
|
Where is cryptococcus neoformans found?
|
Soil and pigeon droppings.
|
|
What is the histologic appearance of Mucor?
|
Just like Rhizopus Mold with irregular, broad, empty looking, nonseptate hyphae branching at wide angles (over 90 degrees)
|
|
What is the histologic appearance of Rhizopus?
|
Just like Mucor Mold with irregular, broad, empty looking, nonseptate hyphae branching at wide angles (over 90 degrees)
|
|
Which patients are likely to have Mucor/Rhizopus?
|
1. Ketoacidotic diabetics 2. Leukemics
|
|
Where in the body does Mucor/Rhizopus proliferate?
|
1. Walls of blood vessels, causing infarction of distal tissue 2. Rhinocerebral frontal lobe abscesses
|
|
What is pneumocystis jirovecii?
|
Formerly pneumocystis carinii. Yeast (originally classified as a protozoan)
|
|
What disease states does Pneumocystis cause?
|
Most infection sasymptomatic. Immunosuppresion predisposes to disease.
|
|
How is pneumocystis diagnosed?
|
Lung biopsy or lavage. Methenamine silver stain of lung tissue.
|
|
Treatment for pneumocystis
|
Combination of TMP-SMX, Pentamidine, and Dapsone.
|
|
Characterization of sporotrix schenckii
|
Dimorphic fungus that lives on vegetation.
|
|
Presentation of sporotrichosis
|
1. Traumatically introduced into the skin by a thorn 2. Local pustule/ulcer with nodules along draining lymphatics (ascending lymphangitis)
|
|
What is rose gardener's disease?
|
Sporotrichosis
|
|
Histologic appearance of sporotrix schenckii
|
Cigar-shaped yeast visible in pus with unequal budding
|
|
Treatment for sporotrichosis
|
Itraconazole or potassium iodide
|
|
What disease states does Entamoeba histolytica cause?
|
1. Amebiasis 2. Bloody diarrhea (dysentery) 3. liver abscess 4. RUQ pain
|
|
What disease states does Giardia lamblia cause?
|
1. Giardiasis 2. Bloating 3. Flatulence 4. Foul-smelling diarrhea
|
|
What diseases are found in campers and hikers?
|
Yersinia pestis and Giardia lamblia
|
|
What disease states does Cryptosporidium cause?
|
Diarrhea 1. AIDS: Severe 2. Non-HIV: Mild watery
|
|
What disease states does Toxoplasma cause?
|
1. HIV: Brain abscess 2. Birth defects (ring-enhancing brain lesions)
|
|
What disease states does Plasmodium cause?
|
Malaria: 1. Cyclic fever 2. Headache 3. Anemia 4. Splenomegaly 5. Severe cerebral malaria (with Plasmodium falciparum)
|
|
What disease states does Trichomonas cause?
|
Trichomonas vaginalis causes vaginitis with foul-smelling greenish discharge, strawberry-colored mucosa, and itching and burning. Motile on wet prep.
|
|
What disease states does Trypanosoma cruzi cause?
|
Chagas' disease: 1. Dilated cardiomyopathy 2. Megacolon 3. Megaesophagus
|
|
What disease states does Trypanosoma gambiense cause?
|
African sleeping sickness
|
|
What disease states does Trypanosoma rhodesiense cause?
|
African sleeping sickness
|
|
What disease states does Leishmania donovani cause?
|
Visceral leishmaniasis (kala-azar or black fever): fever, weight loss, anaemia and substantial swelling of the liver and spleen
|
|
What disease states does Naegleria cause?
|
Rapidly fatal meningoencephalitis
|
|
What disease states does Babesia cause?
|
Babesiosis: Fever and anemia
|
|
Which protozoa are transmitted by cysts?
|
1. Entamoeba histolytica 2. Giardia lamblia 3. Cryptosporidium 4. Toxoplasma All water cysts except Toxo (cysts in meat or cat feces)
|
|
Which protozoa are transmitted by swimming in freshwater lakes?
|
Naeglaria (via cribriform plate)
|
|
Which protozoa are transmitted sexually?
|
Trichomonas vaginalis
|
|
Which protozoa are transmitted by mosquito?
|
Plasmodium
|
|
Which protozoa are transmitted by reduviid bug?
|
Trypanosoma cruzi (the enses are transmitted by the tsetses, cruzii by reduviid))
|
|
Which protozoa are transmitted by tsetse fly?
|
Trypanosoma gambiense and rhodesiense (the enses are transmitted by the tsetses, cruzii by reduviid))
|
|
Which protozoa are transmitted by sandfly?
|
Leishmania
|
|
Which protozoa are transmitted by ixodes tick?
|
Babesia
|
|
How do you diagnose: Giardia lamblia
|
Trophozoites or cysts in stool (classic pair shaped organism with double nuclei like owl eyes)
|
|
How do you diagnose: Entamoeba histolytica
|
1. Trophozoites or cysts in stool AND/OR 2. Serology
|
|
How do you diagnose: Cryptosporidium
|
Cysts on acid-fast stain
|
|
How do you diagnose: Toxoplasma
|
Serology, biopsy
|
|
How do you diagnose: Plasmodium
|
Blood smear
|
|
How do you diagnose: Trypanosoma
|
Blood smear
|
|
How do you diagnose: Babesia
|
Blood smear, no RBC pigment, appears as ""maltese cross""
|
|
How do you diagnose: Leishmania
|
Macrophages containing amastigotes
|
|
How do you diagnose: Naegleria
|
Amebas in spinal fluid
|
|
Treatment for: Entameba histolytica
|
Metronidazole and iodoquinol
|
|
Treatment for: Giardia lamblia
|
Metronidazole
|
|
Treatment for: Trichomonas vaginalis
|
Metronidazole
|
|
Treatment for: Cryptosporidium
|
None
|
|
Treatment for: Naegleria
|
None
|
|
Treatment for: Plasmodium
|
1. Choloroquine 2. additonal Primaquine ( to prevent relapse or liver damage) 3. sulfadoxine plus pyrimethamine 4. Mefloquine 5. Quinine
|
|
Treatment for: Trypanosoma cruzi
|
Nifurtimox
|
|
Treatment for: Trypanosoma gambiense and rhodesiense
|
If blood-borne, suramin. If CNS penetration, melarsoprol.
|
|
Treatment for: Leishmania
|
Sodium stibogluconate
|
|
Treatment for: Babesia
|
Qunine, clindamycin
|
|
Treatment for: Toxoplasma
|
Sulfadiazine plus pyrimethamine
|
|
Type of bug: Candida albicans
|
Dimorphic fungus, cutaneous OR systemic infection
|
|
Type of bug: Coccidioides immitis
|
Monomorphic fungus, systemic infection
|
|
Type of bug: Histoplasma capsulatum
|
Dimorphic fungus, systemic infection
|
|
Type of bug: Blastomyces dermatidis
|
Dimorphic fungus, systemic infection
|
|
Type of bug: Paracoccidioides brasiliensis
|
Dimorphic fungus, systemic infection
|
|
Type of bug: Malassezia furfur
|
Monomorphic fungus, superficial infection
|
|
Type of bug: Cladosporium werneckii
|
Monomorphic fungus, superficial infection
|
|
Type of bug: Microsporum
|
Monomorphic fungus, cutaneous infection
|
|
Type of bug: Trichophyton
|
Monomorphic fungus, cutaneous infection
|
|
Type of bug: Epidermophyton
|
Monomorphic fungus, cutaneous infection
|
|
Type of bug: Aspergillus fumigatus
|
Monomorphic fungus, opportunistic systemic infection
|
|
Type of bug: Cryptococcus neoformans
|
Monomorphic fungus, opportunistic systemic infection
|
|
Type of bug: Mucor
|
Monomorphic fungus, opportunistic systemic infection
|
|
Type of bug: Rhizopus
|
Monomorphic fungus, opportunistic systemic infection
|
|
Type of bug: Pneumocystis jirovecii
|
Monomorphic fungus, opportunistic systemic infection
|
|
Type of bug: Sporothrix schenckii
|
Dimorphic fungus, subcutaneous infection with some lymphatic spread
|
|
Type of bug: Entamoeba histolytica
|
Protozoan
|
|
Type of bug: Giardia lamblia
|
Protozoan
|
|
Type of bug: Naegleria
|
Protozoan
|
|
Type of bug: Plasmodium
|
Protozoan
|
|
Type of bug: Cryptosporidium
|
Protozoan
|
|
Type of bug: Toxoplasma
|
Protozoan
|
|
Type of bug: Trichomonas
|
Protozoan
|
|
Type of bug: Trypanosoma
|
Protozoan
|
|
Type of bug: Leishmania
|
Protozoan
|
|
Type of bug: Babesia
|
Protozoan
|
|
Type of bug: Taenia solium
|
Helminth: Cestode (Tapeworm)
|
|
Type of bug: Echinococcus granulosus
|
Helminth: Cestode (Tapeworm)
|
|
Type of bug: Schistosoma
|
Helminth: Trematode (fluke)
|
|
Type of bug: Clonorchis sinensis
|
Helminth: Trematode (fluke)
|
|
Type of bug: Paragonimus westermani
|
Helminth: Trematode (fluke)
|
|
Type of bug: Ancylostoma duodenale
|
Helminth: Nematode (roundworm)
|
|
Type of bug: Ascaris lumbricoides
|
Helminth: Nematode (roundworm)
|
|
Type of bug: Enterobius vermicularis
|
Helminth: Nematode (roundworm)
|
|
Type of bug: Strongyloides stercolaris
|
Helminth: Nematode (roundworm)
|
|
Type of bug: Trichinella spiralis
|
Helminth: Nematode (roundworm)
|
|
Type of bug: Dracunculus medinensis
|
Helminth: Nematode (roundworm)
|
|
Type of bug: Loa loa
|
Helminth: Nematode (roundworm)
|
|
Type of bug: Onchocera volvulus
|
Helminth: Nematode (roundworm)
|
|
Type of bug: Toxocara canis
|
Helminth: Nematode (roundworm)
|
|
Type of bug: Wuchereria bancrofti
|
Helminth: Nematode (roundworm)
|
|
Type of bug: Treponema
|
Spirochete
|
|
Which worm: Undercooked pork
|
1. Taenia solium (tapeworm) 2. Trichinella spiralis (roundworm)
|
|
Which worm: Brain cysts
|
Taenia solium (tapeworm)
|
|
Which worm: Liver cysts
|
Echniococcus granulosus (tapeworm)
|
|
Important points about echinococcus granulosus
|
Tapeworm (Cestode) 1. Ingested eggs from dog feces 2. Liver cysts 3. Cysts release antigens and cause anaphylaxis
|
|
Taenia solium: Treatment
|
Praziquantel/niclosamide. Albendazole for cysticercosis
|
|
Echinococcus granulosus: Treatment
|
Albendazole
|
|
Characterization of Schistosoma
|
Fluke (Trematode) 1. Hosted by snails 2. Penetrate skin of humans
|
|
Presentation of Schistosoma
|
Spleen and liver: 1. Granulomas 2. Fibrosis 3. Inflammation
|
|
Schistosoma: Treatment
|
Praziquantel
|
|
Which worm: Portal hypertension
|
Schistosoma mansoni
|
|
Which worm: Hematuria
|
Schistosoma haematobium
|
|
Which worm: Bladder cancer
|
Schistosoma haematobium
|
|
Important points about Clonorchis sinensis
|
Fluke (trematode) 1. undercooked fish 2. Inflammation of biliary tract
|
|
Which worm: Undercooked fish
|
Clonorchis sinensis
|
|
Clonorchis sinensis: Treatment
|
Praziquantel
|
|
Which worm: B12 deficiency
|
Diphyllobothrium latum (tapeworm)
|
|
Which worm: Undercooked crab meat
|
Paragonimus westermani (fluke)
|
|
Important points about Pargonimus westermani
|
Trematode (fluke) 1. Undercooked crabmeat 2. Inflammation and secondary bacterial infection of the lung 3. Hemoptysis
|
|
Which worm: Hemoptysis
|
Paragonimus westermani (fluke)
|
|
Paragonimus westermani: Treatment
|
Praziquantel
|
|
Which worm: Microcytic anemia
|
Ancylostoma (aka hookworm) and Necator (both roundworms)
|
|
Which worm: Perianal pruritus
|
Enterobius vermicularis (aka pinworm, a roundworm)
|
|
Important points about Ancylostoma duodenale
|
Nematode (roundworm) 1. Aka hookworm 2. Larvae penetrate skin of feet 3. Intestinal infection can cause anemia
|
|
Ancylostoma duodenale: Treatment
|
Mebendazole/pyrantel pamoate
|
|
Important points about Ascaris lumbricoides
|
Nematode (roundworm) 1. Aka giant roundworm (Up to 1 foot in length!) 2. Eggs are visible in feces. 3. Intestinal infection
|
|
Ascaris lumbricoides: Treatment
|
Mebendazole/pyrantel pamoate
|
|
Important points about Enterobius vermicularis
|
Nematode (roundworm) 1. Aka pinworm 2. Food contaminated with eggs 3. Intestinal infection 4. Anal pruritus (scotch tape test)
|
|
Enterobius vermicularis: Treatment
|
Mebendazole/pyrantel pamoate
|
|
Important points about Strongyloides stercoralis
|
Nematode (roundworm) 1. Larvae in soil penetrate the skin 2. Intestinal infection
|
|
Strongyloides stercoralis: treatment
|
Ivermectin/thiabendazole
|
|
Important points about Trichinella spiralis
|
Roundworm (nematode) 1. Undercooked meat, usually pork 2. Inflammation of muscle 3. Periorbital edema
|
|
Trichinella spiralis: Treatment
|
Thiabendazole
|
|
Important points about Dracunculus medinensis
|
Nematode (roundworm) 1. In drinking water 2. Skin inflammation and ulceration
|
|
Dracunculus medinensis: Treatment
|
Niridazole
|
|
Important points about Loa loa
|
Nematode (roundworm) 1. Transmitted by deer fly 2. Causes swelling in skin 3. Can see worm crawling in conjunctiva
|
|
Loa loa: Treatment
|
Diethylcarbamazine
|
|
Important points about Onchocerca volvulus
|
Nematode (roundworm) 1. Transmitted by female blackflies 2. Causes river blindness
|
|
Onchocerca volvulus: Treatment
|
Ivermectin
|
|
Important points about Toxocara canis
|
Nematode (roundworm) 1. Food contaminated with eggs 2. Causes granulomas (if in retina, blindness) 3. Visceral larva migrans
|
|
Toxocara canis: Treatment
|
Diethylcarbamazine
|
|
Important points about Wuchereria bancrofti
|
Nematode (roundworm) 1. Female mosquito 2. Causes blockage of lymphatic vessels (elephantiasis)
|
|
Wuchereria bancrofti: Treatment
|
Diethylcarbamazine
|
|
Which DNA viruses are double stranded?
|
All DNA viruses except for Parvoviridae
|
|
Which DNA viruses are single stranded?
|
Parvoviridae
|
|
Which DNA viruses have linear genomes?
|
All except papova virus and hepadna which are circular
|
|
Which DNA viruses have circular genomes?
|
papova virus and hepadna which are circular
|
|
Which RNA viruses are single stranded?
|
All except Reovirus (ds)
|
|
Which RNA viruses are double stranded?
|
Reovirus (ds)
|
|
Which DNA viruses have infectious naked nucleic acids?
|
Most dsDNA (except poxvirus and HBV)
|
|
Which DNA viruses have non-infectious naked nucleic acids?
|
poxvirus and HBV
|
|
Which RNA viruses have infectious naked nucleic acids?
|
strand+ ssRNA (almost the same as mRNA)
|
|
Which RNA viruses have noninfectious naked nucleic acids?
|
strand- ssRNA
|
|
Which enveloped viruses acquire their envelopes from the plasma membrane?
|
All except herpesviruses (nuclear membrane)
|
|
Which enveloped viruses acquire their envelopes from the nuclear membrane?
|
Only herpesviruses
|
|
Which viruses are haploid?
|
All except retroviruses (diploid)
|
|
Which viruses are diploid?
|
Retroviruses
|
|
Where do DNA viruses replicate?
|
In the nucleus (except pox)
|
|
Where do RNA viruses replicate?
|
Cytoplasm (except influenza and retroviruses)
|
|
Which DNA viruses are icosahedral?
|
All except pox (complex)
|
|
Which DNA viruses replicate in the nucleus?
|
All except pox (carries own DNA-dependent RNA polymerases)
|
|
Humoral or Cell-mediated immunity: Live attenuated vaccines
|
Both (with a few cases of reversion to virulence)
|
|
Humoral or Cell-mediated immunity: Killed vaccines
|
Humoral immunity (stable)
|
|
Live/Killed and Egg-based/Recombinant: MMR vaccine
|
Live attenuated, egg-based
|
|
Live/Killed and Egg-based/Recombinant: Sabin polio vaccine
|
Live attenuated
|
|
Live/Killed and Egg-based/Recombinant: VZV vaccine
|
Live attenuated
|
|
Live/Killed and Egg-based/Recombinant: Yellow fever vaccine
|
Live attenuated, egg-based
|
|
Live/Killed and Egg-based/Recombinant: Smallpox vaccine
|
Live attenuated
|
|
Live/Killed and Egg-based/Recombinant: Adenovirus vaccine
|
Live attenuated
|
|
Live/Killed and Egg-based/Recombinant: Rabies vaccine
|
Killed
|
|
Live/Killed and Egg-based/Recombinant: Influenza vaccine
|
Killed, egg-based
|
|
Live/Killed and Egg-based/Recombinant: Salk polio vaccine
|
Killed
|
|
Live/Killed and Egg-based/Recombinant: HAV vaccine
|
Killed
|
|
Definition: Viral recombination
|
Exchange of genes between 2 chromosomes by crossing over within regions of significant base sequence homology
|
|
What is this viral process: Exchange of genes between 2 chromosomes by crossing over within regions of significant base sequence homology
|
Viral recombination
|
|
Definition: Viral Reassortment
|
Viruses with segmented genomes exchange segments. Same as high frequency recombination. Cause of worldwide pandemics.
|
|
What is this viral process: Viruses with segmented genomes exchange segments.
|
Viral Reassortment Same as high frequency recombination. Cause of worldwide pandemics.
|
|
Definition: Viral Complementation
|
When 1 of 2 viruses that infect the cell has a mutation that results in nonfunctional protein and the non-mutated virus ""complements"" the mutated one by making a functional protein that serves both viruses.
|
|
What is this viral process: When 1 of 2 viruses that infect the cell has a mutation that results in nonfunctional protein and the non-mutated virus makes a functional protein that serves both viruses.
|
Viral Complementation
|
|
Definition: Viral Phenotypic Mixing
|
Genome of virus A can be coated with the surface proteins of virus B. Type B protein coat determines the infectivity of the phenotypically mixed virus. Progeny of type A however have type A coat from type A genes.
|
|
What is this viral process: Genome of virus A can be coated with the surface proteins of virus B. Type B protein coat determines the infectivity of the phenotypically mixed virus.
|
Viral Phenotypic Mixing Progeny of type A however have type A coat from type A genes.
|
|
What does HBsAg measure?
|
HBV surface antigen. Continued presence indicates carrier state.
|
|
What does HBsAb measure?
|
Antibody to HBsAg. Provides immunity to hepatitis B.
|
|
What does HBcAb measure?
|
Antibody to core antigen. Positive during window period (no HBsAg or HBsAb detected). IgM HBcAb is an indicator of recent disease.
|
|
What does HBeAg measure?
|
A second different antigenic determinant in the HBV core. Important indicator of transmissibility. (BEware!)
|
|
What does HBeAb measure?
|
Antibody to e antigen; indicates low transmissibility.
|
|
What is gag?
|
Gene that encodes for p24 capsid, the nucleocapsid in HIV
|
|
What is env?
|
Gene that encodes for gp41 and gp120 proteins, the envelope proteins in HIV.
|
|
What is p17?
|
Interior envelope protein in HIV
|
|
What is p24?
|
Nucleocapsid protein in HIV, coded for by gag gene.
|
|
What is gp41?
|
Envelope protein which traverses bilayer. If it is a mushroom stalk, then gp120 is the head. Both coded for by env.
|
|
What is gp120?
|
Envelope protein that serves as mushroom cap to gp41 stalk. Both coded for by env.
|
|
What is pol?
|
Gene which codes for HIV reverse transcriptase
|
|
Common causes of osteomyelitis in sexually active people.
|
Neisseria gonorrhoeae (rare), septic arthritis more common
|
|
Common causes of osteomyelitis in diabetics.
|
Pseudomonas aeruginosa
|
|
Common causes of osteomyelitis in drug addicts.
|
Pseudomonas aeruginosa
|
|
Common causes of osteomyelitis in people with prosthetic replacement
|
Staphylococcus aureus and Staphylococcus epidermidis
|
|
Common causes of vertebral osteomyelitis
|
Mycobacterium tuberculosis (Pott's disease)
|
|
Common causes of urinary tract infections in ambulatory people
|
Mostly ascending infections 1. E. coli (50-80%) 2. Staphylococcus saprophyticus (10-30%) in young amubulatory women 3. Klebsiella (8-10%)
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Common causes of urinary tract infections in the hospital
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Mostly ascending infections 1. E. coli 2. Proteus 3. Klebsiella 4. Serratia 5. Pseudomonas
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Risk factor for nosocomial CMV infection.
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Newborn nursery
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Risk factor for nosocomial RSV infection.
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Newborn nursery
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Risk factor for nosocomial E. coli infection.
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Urinary catheterization
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Risk factor for nosocomial Proteus mirablis infection.
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Urinary catheterization
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Risk factor for nosocomial Pseudomonas aeruginosa infection.
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Respiratory therapy equipment
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Risk factor for nosocomial HBV infection.
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Work in renal dialysis unit
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Risk factor for nosocomial Candida albicans infection.
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Hyperalimentation
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Risk factor for nosocomial Legionella infection.
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Water aerosols
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2 most common causes of nosocomial infections
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1. E. coli (UTI) 2. S. aureus (wound infection)
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What bug: Pus
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Staphylococcus aureus
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What bug: Empyema
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Staphylococcus aureus (means pus in a natural body cavity, not an abscess)
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What bug: Abscess
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Staphylococcus aureus
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What bug: Pediatric infection
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Haemophilus influenzae
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Most common causes of pneumonia in people with cystic fibrosis.
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Pseudomonas aeruginosa
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What bug: Branching rods in oral infection
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Actinomyces israelii
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What bug: Traumatic open wound infection
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Clostridium perfringens
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What bug: Surgical wound
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Staphylococcus aureus
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What bug: Dog or cat bite
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Pasteurella multocida
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What bug: Sepsis in a newborn
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Group B Strep
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What bug: Meningitis in a newborn
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Group B Strep
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What organism is associated w/ HLA-B27 spondyloarthropathy and uremic Sx?
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Shigella
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What is the MC contaminant of blood transfusions?
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Yersenia enterocolitica
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What are trophozoites phagocytosed RBCs?
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Entameba histolytica (Ameba)
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What organism causes chorioamnionitis?
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Step. agalactiae
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Most common: Hereditary bleeding disorder
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von Willebrand's
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Most common: Ovarian tumor (malignant)
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Serous cystadenocarcinoma
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Most common: Malignancy associated with noninfectious fever
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Hodgkin's disease
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Most common: Mets to bone
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Breast, lung, thyroid, testes, prostate, kidney
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Most common: Mets to brain
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Lung, breast, skin (melanoma), kidney (RCC), GI
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Most common: Breast tumor (benign)
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Fibroadenoma
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Most common: Brain tumor (kids)
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Medulloblastoma (cerebellum)
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Most common: Preventable cancer
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Lung cancer
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Most common: Leukemia (adults)
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AML
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Most common: Breast mass
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Fibrocystic change (in postmenopausal wormen, carcinoma in the most common)
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Most common: Location of brain tumors (kids)
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Infratentorial
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Most common: Sexually transmitted disease
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Chlamydia
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Most common: Pituitary tumor
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Prolactinoma (2nd-somatotropic acidophilic adenoma)
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Most common: Location of brain tumors (adults)
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Supratentorial
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Most common: Tumor of the adrenal medulla (kids)
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Neuroblastoma (malignant)
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Most common: Bacteria found in GI tract
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Bacteroides (2nd most common is E. coli)
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Most common: Kidney stones
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Calcium=radiopaque (2nd most common is ammonium=radiopaque; formed by urease-positive organisms such as Protease vulgaris or Staph)
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Most common: Bacteremia/pneumonia (IVDA)
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S. aureus
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Most common: Primary hyperparathyroidism
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Adenomas (followed by hyperplasia, then carcinoma)
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Most common: Breast cancer
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Infiltrating ductal carcinoma (in the US, 1 in 9 women will develop breast cancer)
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Most common: Site of metastasis (2nd most common)
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Liver
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Most common: Gynecologic malignancy
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Endometrial carcinoma
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Most common: Testicular tumor
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Seminoma
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Most common: Brain tumor (adults)
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Mets>astrocytoma (including glioblastoma multiforme)>meningioma>schwannoma
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Most common: Brain tumor-supratentorial (kids)
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Craniopharyngioma
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Most common: Skin cancer
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Basal cell carcinoma
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Most common: Ovarian tumor (benign)
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Serous cystadenoma
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Most common: Tumor in women
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Leiomyoma (estrogen dependent)
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Most common: Vasculitis
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Temporal arteritis (risk of ipsilateral blindness due to thrombosis of ophthalmic artery)
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Most common: Viral encephalitis
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HSV
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Most common: Bacteria associated with cancer
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H. pylori
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Most common: Tracheoesophageal fistula
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Lower esophagus joins trachea/upper esphagus-blind pouch
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Most common: Renal tumor
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Renal cell carcinoma-associated with von Hippel-Lindau and acquired polycystic kidney disease; paraneoplastic syndromes
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Most common: Bug in debilitated, hospitalized pneumonia patient
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Klebsiella
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|
Most common: Type of pituitary adenoma
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Prolactinoma
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Most common: Site of metastasis
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Regional lymph nodes
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Most common: Secondary hyperparathyroidism
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Hypcalcemia of chronic renal failure
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Most common: Nephrotic syndrome
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Membranous glomerulonephritis
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Most common: Helminth infection (U.S.)
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Enterobius vermicularis (Ascaris lubricoides is 2nd most common)
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Most common: Type of Hodgkin's
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Follicular, small cleaved
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Most common: Organ sending mets
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Lung>breast, stomach
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Most common: Primary liver tumor
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Hepatoma
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Most common: Organ receiving mets
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Adrenal glands (due to rich blood supply)
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Most common: Neoplasm (kids)
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ALL (2nd most common is cerebellar medulloblastoma)
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Most common: Tumor of infancy
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Hemangioma
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Most Frequent Cause of: Pancreatitis (chronic)
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EtOH (adults), cystic fibrosis (kids)
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Most Frequent Cause of: Hemochromatosis
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Multiple blood transfusions (can result in CHF and increased risk of HCC)
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Most Frequent Cause of: Congenital adrenal hyperplasia
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21-hydroxylase deficiency
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Most Frequent Cause of: Pneumonia, hospital-acquired
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Klebsiella
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Most Frequent Cause of: Primary hyperparathyroidism
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Adenoma
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Most Frequent Cause of: Primary hyperaldosteronism
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Adenoma of adrenal cortex
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Most Frequent Cause of: Aortic aneuyrysm, ascending
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Tertiary syphilis
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Most Frequent Cause of: Addison's
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Autoimmune (infection is the 2nd most common cause)
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Most Frequent Cause of: Bacterial meningitis (adults)
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Streptococcus pneumoniae
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Most Frequent Cause of: UTI (young women)
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E. coli and Staphylococcus saprophyticus
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Most Frequent Cause of: Bacterial meningitis (kids)
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S. pneumoniae or Neisseria meningitidis
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Most Frequent Cause of: Aortic aneurysm, abdominal and descending aorta
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Atherosclerosis
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Most Frequent Cause of: Peau d'orange
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Carcinoma of the breast
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Most Frequent Cause of: Hypopituitarism
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Adenoma
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Most Frequent Cause of: Dementia
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Alzheimer's (2nd most common in multo-infarct)
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Most Frequent Cause of: Right-sided heart failure
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Left-sided heart failure
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Most Frequent Cause of: PID
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Neisseria gonorrhoeae (monoarticular arthritis)
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Most Frequent Cause of: Bacterial meningitis (elderly)
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S. pneumoniae
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Most Frequent Cause of: Hepatic cirrhosis
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EtOH
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Most Frequent Cause of: Food poisoning
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S. aureus
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Most Frequent Cause of: Glomerulonephritis (adults)
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IgA nephropathy (Berger's disease)
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Most Frequent Cause of: SIADH
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Small cell carcinoma of the lung
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Most Frequent Cause of: Bacterial meningitis (newborns)
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Group B streptococcus
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Most Frequent Cause of: Pancreatitis (acute)
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EtOH and gallstones
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Most Frequent Cause of: Cancer associated with AIDS
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Kaposi's sarcoma
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Are D1 neurons in the basal ganglia inhibitory or excitatory?
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Excitatory
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What type of cells are Nissl bodies found? In what parts of the cell?
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Are found in neurons. Are not found in axon or axon hillock.
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What part of the hypothalamus (ant./post.) controls autonomic regulation?
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anterior hypothalamus
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How can a Nissl stain be used to differentiate microglia from oligodendroglia?
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Microglia are not discernible in a Nissl stain while oligodendroglia appear as small dark nuclei with dark chromatin
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What is the response to microglia infected with HIV?
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fusion to form multinucleated giant cells in CNS
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What part of the hypothalamus (ant./post.) controls cooling when hot?
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anterior hypothalamus
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What is the function of microglia?
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Phagocytosis in CNS
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What nucleus if typically lesioned in hemiballismus?
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contralateral subthalamic nucleus
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What is the function of oligodendroglia?
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Myelination of multiple CNS axons
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What nucleus of the hypothalamus controls sexual emotions?
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septate nucleus
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What midbrain structure is important in mitigating voluntary movements and making postural adjustments?
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Basal Ganglia
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Are D2 neurons in the basal ganglia inhibitory or excitatory?
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Inhibitory
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What is the 'gap' between the myelination segment of 2 Schwann cells called?
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Node of Ranvier
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What nucleus of the hypothalamus controls thirst and water balance?
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supraoptic nucleus
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What nucleus of the hypothalamus controls hunger?
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lateral nucleus
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What is the embryologic origin of microglia?
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Mesoderm
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What is the response of microglia to tissue damage?
|
transformation into large ameboid phagocytic cells
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|
What nucleus of the hypothalamus controls circadian rhythms?
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suprachiasmatic nucleus
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What nucleus of the hypothalamus controls satiety?
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ventromedial nucleus
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What part of the hypothalamus (ant./post.) controls heat conservation when cold?
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posterior hypothalamus
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What is associated w/ Alzheimer's Dz?
|
Depression
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|
What is the equation to calculate loading dose?
|
(Cp)(Vd)/F (note: Cp = target plasma concentration, and F = bioavailability)
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|
What drugs should you avoid taking with cephalosporins?
|
Aminoglycosides (increases nephrotoxicity) and ethanol (causes a disulfiram-like rxn -- headache, nausea, flushing, hypotension)
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|
These specific drugs disrupt fungal cell membranes
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amphotericin B, nystatin, fluconazole/azoles (FAN the fungal cell membranes)
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Which drug blocks mRNA synthesis?
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Rifampin
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When would you use aminoglycosides?
|
Against severe gram-negative rod infections.
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How does a competitive inhibitor affect Km?
|
Increases
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|
What is the equation to calculate the maintenance dose?
|
(Cp)(CL)/F (note: Cp = target plasma concentration, and F = bioavailability)
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|
These drugs block nucleotide synthesis by interfering with the folate pathway
|
Sulfonamides (e.g. Bactrim), trimethoprim
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|
These drugs disrupt the bacterial/fungal cell membranes
|
Polymyxins
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|
What's the main difference between a partial agonist and a full agonist?
|
A partial agonist has a lower maximal efficacy
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|
What should you watch out for when giving penicillin?
|
Hypersensitivity reaction (urticaria,severe pruritus) and hemolytic anemia
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|
Bacitracin, vancomycin and cycloserine block the synthesis of this molecule, preventing cell wall synthesis.
|
Peptidoglycans
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What can 3rd generation cephalosporin drugs do that 1st and 2nd generation can't?
|
Cross the blood brain barrier.
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What is the mechanism of action of Pentamidine?
|
Unknown
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|
What is the mechanism for penicillin type drugs?
|
Blocks bacterial cell wall synthesis by inhibition of peptidoglycan synthesis.
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Which drugs are the bacteriacidal antibiotics?
|
Penicillin, cephalosporin, vancomycin, aminoglycosides, fluoroquinolones, metronidazole
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|
What is the antidote for (TCA) Tricyclic Antidepressants toxicity/overdose
|
NaHCO3
|
|
This drug binds to cyclophilins, blocking differentiation and activation of T cells mainly by inhibiting IL2 production
|
cyclosporine
|
|
This antimetabolite derivative of 6-mercaptopurine interferes with the metabolism and synthesis of nucleic acid.
|
azathioprine
|
|
This potent immunosuppressive drug binds to the FK-binding protein and inhibits secretion of IL2 and other cytokines
|
tacrolimus (FK506)
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|
Azaothioprine is used to in what setting?
|
Kidney transplants, autoimmune disorders (glomerulonephritis, hemolytic anemia)
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|
Recombinant Cytokine- Aldesleukin (interleukin-2) is used for?
|
Renal cell carcinoma, metastatic melanoma
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Recombinant Cytokine- Erythropoietin (epoetin) is used for?
|
anemia
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Recombinant Cytokine- Filgrastim is used for?
|
Recovery of Bone Marrow; it is a granulocyte colony stimulating factor
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|
Recombinant Cytokine- alpha interferon is used for?
|
Hep B/C, Kaposi's sarcoma, leukemia, malgnant melanoma
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|
Recombinant Cytokine- oprelvekin (interleukin2) is used for?
|
Thrombocytopenia
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Recombinant Cytokine- sargamostim is used for?
|
Recovery of Bone Marrow (it is a granulocyte-macrophage colony stimulating factor)
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Recombinant Cytokine- thrombopoietin is used for?
|
Thrombocytopenia
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|
Signs of Lead poisoning include:
|
Lead Lines on gingivae and epiphyses of Long bones, Encephalopathy and Erythrocyte Basophilic stippling, Abdominal colic and sideroblastic Anemia
|
|
Weak acids, such as phenobarbitol, methotreaxate, aspirin, alkanize urine with ____ to increase clearance
|
bicarbonate
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|
Weak bases, such as amphetamines, acidify urine with NH4Cl to ____ clearance
|
increase
|
|
-ane
|
inhalational general anesthetic. Halothane
|
|
-azepam
|
benzodiazepine. Diazepam
|
|
-azine
|
phenothiazine (neuroleptic, antiemetic). Chlorpromazine
|
|
-azole
|
antifungal. Ketoconazole
|
|
-barbital
|
barbiturate. Phenobarbital
|
|
-caine
|
local anesthetic. Lidocaine
|
|
-cillin
|
penicillin. Methicillin
|
|
-cycline
|
antibiotic, protein synthesis inhibitor. Tetracycline
|
|
-ipramine
|
tricyclic antidepressant. Imipramine
|
|
-navir
|
protease inhibitor. Saquinavir
|
|
-olol
|
beta antagonist. Propranolol
|
|
-operidol
|
butyrophenone (neuroleptic). Haloperidol
|
|
-oxin
|
cardiac glycoside (inotropic agent). Digoxin
|
|
-phylline
|
methylxanthine. Theophylline
|
|
-pril
|
ACE inhibitor. Captopril
|
|
-terol
|
beta-2 agonist. Albuterol
|
|
-tidine
|
H2 antagonist. Cimetidine
|
|
-triptyline
|
tricyclic antidepressant. Amitriptyline
|
|
-tropin
|
pituitary hormone. Somatotropin
|
|
-zosin
|
alpha-1 antagonist. Prazosin
|
|
What is the complication of Sleep Apnea?
|
Pulmonary Hypertension- vasoconstrictive effects of chronic hypoxemia and respiratory acidosis called COR-PULOMONALE
|
|
What three compounds increase surfactant?
|
Thyroxin, Prolactin, and Glucocorticoid
|
|
What is the importance of the lecithin:sphingomyelin ratio?
|
A ratio greater than 2.0 in fetal lung is indicative of fetal lung maturity
|
|
What is found in the physical exploration of Atelectasis?
|
Dullness to percussion and Absent tactile fremitus
|
|
What is a common finding of sinusitis in diabetics?
|
Mucor sinusitis
|
|
Where is surfactant made?
|
Type II pneumocytes
|
|
What is the last segment of lung tissue in which ciliated cells are found?
|
Respiratory Bronchioles
|
|
What is the advantage of the large surface area:volume ratio in erythrocytes?
|
More Gas Exchange
|
|
What is the function of pulmonary surfactant?
|
Lowers alveolar surface tension and Prevents atelectasis
|
|
Where is surfactant stored?
|
Lamellar bodies
|
|
What process occurs when type I pneumocytes are damaged?
|
Type II pneumocytes develop into Type I
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|
What is the last segment of lung tissue in which goblet cells are found?
|
Terminal Broncioles (remember ciliated cells sweep away mucous produced by goblet cells and therefore run deeper)
|
|
What is the diagnosis of a child w/ Nasal Polyps? Test for?
|
Sweat Test, Cystic Fibrosis (CF) until proven otherwise
|
|
Where do infarctions of the lung usually occur?
|
Lower lobes
|
|
What is another name for pulmonary surfactant?
|
DPPC (dipalmitoylphosphatidylcholine)
|
|
Why does Mucor species prevail in sinusitis of Diabetic patients?
|
Ketoacidosis causes proliferation
|
|
Risk factor for Laryngeal CA?
|
Smoking. Alcohol consumption has an synergistic effect.
|
|
Newborn that turns cyanotic when breast feeding; cries and turns back to pink. Diagnosis?
|
Choanal Atresia
|
|
What is the pathogenesis of Respiratory Distress Syndrome in Newborns?
|
Atelectasis due to loss of surfactant
|
|
When does synthesis of surfactant begin?
|
28th week and reaches production peak at 35 weeks
|
|
How do you calculate the A-a gradient?
|
Alveolar PO2= 21%O2(Atm. P-47)-pCO2/0.8; A= (.21)(713)- 40/0.8); Usually A=100; A-a; a=95; normal A-a=5-30
|
|
When is A-a gradient indicative of pulmonary pathology?
|
when A-a grad = >30
|
|
Patient w/ fibromyalgia and develops asthma, what is the cause of this?
|
Aspirin induced asthma; block PG but still produce Leukotriene build up; LT C-D-E4 buildup (potent bronchoconstrictors)
|
|
Causes of Hypoxemia w/ normal A-a gradient?
|
-barbiturates OD-epiglottitis (Upper Airway Obstr.)-Amyotrophics Lat. Sclerosis (ALS)
|
|
When does pre-eclampsia and eclampsia occur? trimester...
|
3rd trimester
|
|
What is the Diagnosis if pregnant woman presents w/ pre-eclampsia in first trimester?
|
hydatidiform mole
|
|
What two substances are increased in pre-eclampsia?
|
Angiotensin II; TXA2
|
|
What substances are decrease in pre-eclampsia?
|
PGE1 and NO
|
|
What are two substances in pre-eclampsia that are vasoconstrictors?
|
Angiotensin II and TXA2
|
|
What two substances are vasodilators in pre-eclampsia?
|
PGE1 and N.O.
|
|
Tx for Eclampsia?
|
Magnesium Sulfate
|
|
What is the clinical presentation of pre-eclampsia?
|
hypertension; proteinuria; pitting edema
|
|
What is the clinical picture of eclampsia?
|
same as pre-eclampsia but w/ seizures or convulsions
|
|
What is the macula densa?
|
Sodium sensor in part of the distal convoluted tubule in the juxtaglomerular apparatus of the kidney
|
|
What are JG cells?
|
Modified smooth muscle of afferent arteriole in the juxtaglomerular apparatus of the kidney
|
|
How is the glomerular basement membrane formed?
|
From the fusion of endothelial and podocyte basement membranes.
|
|
What is the primary regulatory control of zona glomerulosa secretion?
|
Renin-angiotensin
|
|
What is the function of the JG cells?
|
Secrete renin and erythropoietin
|
|
When do the JG cells secrete renin?
|
In response to decreased renal BP, decreased sodium delivery to distal tubule, and increased sympathetic tone
|
|
Plasma is filtered on the basis of what properties?
|
Filtration of plasma occurs according to net charge and size.
|
|
What is the glomerular basement membrane responsible for?
|
Responsible for the actual filtration of plasma.
|
|
What is the glomerular basement membrane coated with? (provides negative charge to filter).
|
Negatively charged heparan sulfate.
|
|
Should BUN be increase or decreased in normal pregnancy?
|
decreased in normal pregnancy
|
|
Should GFR be increased or decreased in normal pregnancy?
|
Increased
|
|
Where is type II collagen found? (3)
|
1. cartilage (including hyaline) 2. vitreous body 3. nucleus pulposus.
|
|
What is the most abundant protein in the human body?
|
Collagen.
|
|
Where is type I collagen found?(7)
|
1. bone 2. tendon 3. skin 4. dentin 5. fascia 6. cornea 7. late wound repair
|
|
Define Pacinian corpuscles.
|
Large, encapsulated sensory receptors found in deeper layers of skin at ligaments, joint capsules, serous membranes, mesenteries.
|
|
Describe the appearance and status of primary vs. secondary follicles.
|
Primary follicles are dense and dormant. Secondary follicles have pale central germinal centers and are active.
|
|
What are mnemonics for remembering locations for type I, II and IV collagen?
|
Type ONE: bONE Type TWO: carTWOlage Type FOUR: under the FLOOR (basement membrane)
|
|
Where is type III collagen found? (5)
|
1. skin 2.blood vessels 3.uterus 4.fetal tissue 5.granulation tissue
|
|
What is the function of Meissner's corpuscles?
|
Meissner's corpuscles are involved in light discriminatory touch of glabrous skin.
|
|
What is another name for type III collagen?
|
reticulin
|
|
What is the function of Pacinian corpuscles?
|
Pacinian corpuscles are involved in pressure, coarse touch, vibration, and tension.
|
|
Where is type X collagen found? (1)
|
epiphyseal plate
|
|
Define Meissner's corpuscles.
|
Small, encapsulated sensory receptors found in dermis of palm, soles and digits of skin.
|
|
Name the layers of epidermis from surface to base.
|
stratum Corneum, stratum Lucidum, stratum Granulosum, stratum Spinosum, stratum Basalis.
|