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2289 Cards in this Set

  • Front
  • Back
What kind of protein is dynein?
Dynein is an ATPase.
What is the protein responsible for unwinding the DNA double helix?
DNA Helicases
Describe the role of dynein in cilia structure.
Dynein links peripheral 9 doublets of microtubules.
What are the three modifications made to RNA before it leaves the nucleus?
5' capping with 7-methylguanosine, 3' polyadenylation, and splicing of introns
What is the protein that prevents supercoling during replication?
DNA topoisomerases
What is the function of smooth ER?
Is the site of steroid synthesis and detoxification of drugs and poisons
How is the function of gap junctions accomplished?
Through a connection with central channels.
What are Nissl bodies?
rough ER
What is another name for macula adherens?
Desmosome
What is the primary source of energy for the Liver?
Amino acids, lipids, glucose, fructose, and lactate
What are the two Hardy-Weinberg equations?
P^2 + 2pq + q^2 = 1 and p + q = 1
Define poikilocytosis
varying cell shapes
What is another name for zona adherens?
Intermediate junction.
Which cells are rich in smooth ER?
1. liver hepatocytes, 2. steroid hormone-producing cells of adrenal cortex.
What are the conditions for the Hardy-Weinberg equilibrium?
No mutations, No selection, Random mating, and No migration
What is another name for zona occludens?
Tight junction.
Describe microtubule arrangement of cilia.
9+2 arrangement of microtubules.
Name five types of epithelial cell junctions.
1. zona occludens 2.zona adherens 3.macula adherens 4.gap junction 5.hemidesmosome
How does dynein function in cilia function?
Dynein causes the bending of cilium by differential sliding of doublets.
Describe the histological structure of sinusoids of the liver.
Irregular 'capillaries' with round pores 100-200 nm in diameter and no basement membrane.
What is the function of rough ER?
Is the site of synthesis of secretory (exported proteins and of N-linked oligosaccharide addition to many proteins.
Define macula adherens.
Small, discrete sites of attachment of epithelial cells.
What is the function of hemidesmosomes?
Connect cells to underlying extracellular matrix.
What are the functions of the lymph node?
1. Nonspecific filtration by macrophages. 2. storage/proliferation of B and T cells 3. Ab production.
Which cells are rich in rough ER?
1. Mucus-secreting goblet cells of small intestine, 2. antibody-secreting plasma cells.
What is the function of Nissl bodies?
Synthesize enzymes (e.g. ChAT) and peptide neurotransmitters.
Name a protein involved in the structure of hemidesmosomes.
Integrin.
What is the type of mutation that causes a loss of DNA?
Deletion
Define anisocytosis
varying cell sizes
For the following genetic transfer procedure, explain the process: Conjugation
Direct cell to cell DNA transfer
For the following genetic transfer procedure, explain the process: Transduction
Phage-mediated cell to cell DNA transfer
For the following genetic transfer procedure, explain the process: Transformation
Purified DNA taken up by a cell
For the following genetic transfer procedure, explain the process: Transposition
DNA transfer to same or another chromosome or plasmid WITHIN a cell
For the following genetic transfer procedure, give the types of cells involved: Conjugation
Prokaryotic
For the following genetic transfer procedure, give the types of cells involved: Transduction
Prokaryotic
For the following genetic transfer procedure, give the types of cells involved: Transformation
Prokaryotic or eukaryotic
For the following genetic transfer procedure, give the types of cells involved: Transposition
Prokaryotic or eukaryotic
For the following genetic transfer procedure, give the nature of DNA transferred: Conjugation
Chromosomal or plasmid
For the following genetic transfer procedure, give the nature of DNA transferred: Transduction
Generalized transduction: Any gene Specialized transduction: Only certain genes
For the following genetic transfer procedure, give the nature of DNA transferred: Transformation
Any DNA
For the following genetic transfer procedure, give the nature of DNA transferred: Transposition
DNA sequences ""jumping genes""
Woman with anxiety about an exam is told to relax and imagine going through the steps. What process is this?
Systematic desensitization.
65-year old man is diagnosed with incurable adenocarcinoma. His family asks you not to tell him. What do you do?
Assess whether telling the patient will negatively affect his health. If not, tell him.
Girl can groom herself, can hop on 1 foot, and has an imaginary friend. How old is she?
4 years old.
36-year old woman with a family history of breast cancer refuses mammogram b/c she heard it hurts. What do you do?
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
During sleep, man has variable blood pressure, penile tumescence, and variable EEG What stage of sleep is he in?
REM sleep.
15yo F of norm height and weight has enlarged parotid glands. The mother found laxatives. What is the diagnosis?
Bulimia.
11-year old girl exhibits Tanner stage 4 sexual development (almost full breast and pubic hair). What is the diagnosis?
Advanced stage, early development.
4yo F complains of a burning feeling in her genitalia. Smear of discharge shows N. gonorrhoeae. How was she infected?
Sexual abuse.
Person demands only the best and most famous doctor in town. What is the personality disorder?
Narcissism.
Nurse has episodes of hypoglycemia; blood analysis reveals no elevation in C-protein. What is the diagnosis?
Factitious disorder, self scripted insulin.
Observational Study. Sample chosen on presence of absence of disease. Information collected about exposure.
Case-control Study.
Observational study. sample chosen based on presence of absence of risk factors. Subjects followed over time for disease.
Cohort Study.
List 4 ways to reduce bias in a study.
1. Blind studies. 2. Placebo responses. 3. Case-crossover design. 4. Randomization
When the subjects choose the groups it may lead to what type of bias?
Selection bias.
When knowledge of the presence of the disease alters recall by the subjects what type of bias is likely?
Recall bias.
When subjects are not representative of the population and results are not generalizable, what type of bias is this?
Sampling bias.
When information gathered on subjects is done so at an inappropriate time, what bias is likely?
Late-look bias.
The total proportion of cases in a population at a given time.
Prevalence.
The rate of new cases in a population in a given time.
Incidence.
Incidence x Disease Duration
Prevalence
For chronic diseases, which is larger - prevalence or incidence?
Prevalence > Incidence for Chronic Disease
When does prevalence = incidence?
For acute disease (ie the common cold)
What is the PPV?
The probability of having a condition given a positive test. TP/(TP+FP) = PPV
What is NPV?
The probability of not having the condition given a negative test. TN/(TN+FN) = NPV
Unlike sensitivity and specificity, the predictive values are ....
dependent on the prevalence of disease. The higher the prevalence of disease, the higher the predictive value of the test.
a/(a+c)
sensitivity
d/(b+d)
specificity
a/(a+b)
PPV
d/(c+d)
NPV
(a/b)/(c/d)
OR - approximates RR if prevalence of disease is not too high.
[a/(a+b)]/[c/(c+d)]
RR - relative risk
Attributable risk formula?
[a/(a+b)]-[c/(c+d)]
The consistency and reproducibility of a test is the ....
Precision.
Absence of random variation in a test ....
Precision.
The trueness of the test measurements is the ...
Accuracy
Reduced precision means
increase in random error
Reduced accuracy means
increase in systematic error
Number needed to treat
NNT = 1/(Ic-Ie); The number of pts that need to be treated to prevent 1 additional bad outcome.
Reliability is ...
the reproducibility of a test. a Test is reliable if repeat measurements are the same.
Validity is ...
whether the test truly measures what it purports to measure. A test is valid if it measures what it is supposed to measure.
Gaussian distribution is ...
a normal distribution (bell curve) (mean=median=mode)
A bimodal distribution ...
has 2 humps
A positive skew distribution ...
is asymmetry with the tail to the right, hump on the left (mean>median>mode)
a Negative skew distribution ...
is asymmetry with the tail to the left, hump on the right (mean<median<mode)
A null hypothesis is ...
There is no association (ie between the risk factor and the disease in the popuation.)
The alternative hypothesis is ...
There is some difference (ie between the disease and the risk factor in the population)
Type 1 error (alpha)
Stating there IS an effect or difference where none really exists.
Type II error (beta)
Stating there IS NOT an effect or difference when one really exists.
Power
the probability of rejecting the null hypothesis when it is in fact false.
Power in a study depends on what two things ...
1. total number of endpoints experienced by the population; 2. difference in compliance between treatment groups
How do you increase study power
increase the sample size.
Confidence interval
mean +/- 1.96 (SEM) If the CI includes 0, H0 is accepted.
Normal (Gaussian) distribution has what percentage of the population in each standard deviation?
68% within 1 SD, 95% within 2 SDs, 99.7% within 3 SDs.
Correlation coefficient indicates
the strength of the correlation between two variables. The sign indicates a positive or negative.
What is Primary Disease Prevention?
Prevent the disease from occuring.
What is Secondary Disease Prevention?
Early detection of the disease.
What is Tertiary Disease prevention?
Reduce mobidity from the disease.
What are important preventative measure for patients with DM?
Eye exams, foot exams, urine tests.
What are important preventive measures for pts with drug abuse problems?
HIV test, TB test, Hep immunizations.
What are important preventive measures for pts with alcoholism?
influenza, pneumococcal immunizations and TB testing
What is an important preventive measure to offer obese pts?
Blood sugar testing for diabetes.
What is an important preventive measure to offer homeless pts or recent immigrants?
TB tests
What tests are important for pts engaging in high risk sexual behavior?
HIV, Hep B, Syphilis, gonorrhea, chlamydia tests.
What are the leading causes of death for infants in the US?
1. Congenital anomalies 2. Short gestation/LBW 3. SIDS 4. Maternal complications of pregnancy 5. RDS
What are the leading causes of death for children age 1-14 in the US?
1. Injuries 2. Cancer 3. Congenital anomalies 4. Homicide 5. Heart disease
What are the leading causes of death for people 15-24 years of age in the US?
1. Injuries 2. Homicide 3. Suicide 4. Cancer 5. Heart disease
What are the leading causes of death for adults 25-64 yo in the US?
1. Cancer 2. Heart disease 3. Injuries 4. Suicide 5. Stroke
What are the leading causes of death for adults over the age of 65 in the US?
1. Heart disease 2. Cancer 3. Stroke 4. COPD 5. Pneumonia 6. Influenza
Define autonomy
The obligation to respect patients as individuals and to honor their preferences in medical care.
What is legally required for Informed Consent?
1. discussion of pertinent information 2. patient's agreement to the plan of care 3. freedom from cohersion
In what circumstances is there an exception to the mandates of informed consent?
1. Patient lacks decision making capacity. 2. Implied consent is an emergency 3. Therapeutic privilege 4. Waiver - pt waives the right to informed consent
What is Therapeutic Privilege
Withholding information when disclosure would severely harm the patietn or undermine informed decision making capacity.
What are some variables in determining a patients decision making capacity?
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
Define Transference.
When the patient projects feelings stemming from their personal life onto their physician.
Define Countertransference.
When the doctor projects feelings stemming from their personal life onto the pt.
Define classical conditioning.
Leaning where a natural response is elicited by a conditioned stimulus that was previously presented in conjunction with an unconditional natural stimulus.
Define operant conditioning.
learning in which a particular action is elicited because it produces a reward.
How does the Stanford Binet test calculate intelligence?
IQ as (mental age/chronological age) x 100
How does Wechsler (WAIS) measure intelligence?
11 subtests (6 verbal, 5 performance)... Mean is 100, SD - 15.
What is the IQ cutoff for diagnosis of mental retardation?
IQ < 70 or 2 SD below mean.
True or False: IQ tests are objective test.
True ... but they are NOT projective tests.
Are IQ scores correlated with genetic factors or school achievement?
Yes to both ... but more highly correlated to school achievement.
What is an oral advanced directive?
In an incapacitated state, a pts prior oral statement is commonly used as a guide.
What is a written advanced directive?
a living will.
What is a durable power of attorney?
pt designates a surrogate to make a medical decision in the event that the patient loses decision making capacity.
What is non-maleficence
do no harm"". However, if benfits of an intervention outweigh the risks, a patient may make an informed decision to proceed.
Define beneficence
The physicians ethical responsibility to act in the patients best interest (as a fiduciary). Can conflict with autonomy.
In what circumstances can a physician break confidentiality?
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
What steps may a physician take to prevent harm caused by a patients infectious disease?
Physician may have a duty to warn public health officials (reportable diseases) and identify people at risk.
What is the Tarasoff decision?
A law requiring physician to directly inform and protect a potential victim from harm; may involve a breach of confidentiality.
May a physician break confidentiality if in cases of an automobile accident?
Only if they suspect that the driver was impaired
How may a physician handle a suicidal or homicidal patient?
The physician may hold the patient involuntarily for a period of time ... or until psychiatric evaluation is completed.
A civil suit under negligence requires what 3 things?
1. Physician breach of duty to patient (Dereliction) 2. patient suffers harm (damage) 3. Breach of duty causes harm (Direct)
What is the most common factor leading to litigation between the physician and pt?
poor communication.
In a criminal suit the burden of proof is "beyond a reasonable doubt" ... in a malpractice suit the burden of proof is ...
more likely than not
Define Anosognia
unaware that one is ill
Define Autotopagnosia
unable to locate ones own body parts
Define depersonalization
body seems unreal or dissociated
What is involved in orienting the patient
person, place, and time
What is the order of orientation loss in a disoriented patient?
time goes first, then place, and last person
Define anterograde amnesia
the inability to remember things that occred AFTER an CNS insult ... cannot make new memories
Define retrograde amnesia
inability to remember things that occured before a CNS insult
What is Korsakoff's anmesia
classic anterograde anmesia caused by a thymine deficiency.
A alcoholic patient presents with anterograde amnesia, and confabulations. What is the likely diagnosis?
Korsakoffs amnesia
How many signs of maladaptive substance abuse must be present in a years time to diagnose substance dependance?
3 or more.
What is the difference between substance dependence and substance abuse?
substance abuse is maladaptive patterns leading to clinical or social impairment or distress that have not met the criteria for substance dependence.
What are Freud's three structures of the mind?
Id, Ego, Superego
Define the Id.
Primal urges, sex and aggression.
Define the Superego.
Moral values and conscience
Define the Ego.
Mediator between unconscious mind and external world.
The Topographic theory of the mind deals with what three topography?
Conscious, precocious, and unconscious
Define Conscious
What you are aware of.
Define precocious
What you are able to make conscious with effort
Define unconscious
what you are not aware of.
What is an Oedipus complex?
repressed sexual feelings of a child for the opposite sex parent, accompanied by a rivalry with same sex parent.
hallucinations, delusions, strange behavior, and loose associations are positive symptoms of what disorder?
Schizophrenia.
What are some negative symptoms of schizophrenia?
flat affect, social withdrawal, thought blocking, lack of motivation
How long must a patient experience symptoms of schizophrenia for a diagnosis?
Periods of psychosis or disturbed behavior lasting > 6 months.
What are the 5 types of schizophrenia?
1. Disorganized 2. Catatonic 3. paranoid 4. Undifferentiated 5. Residual
What are the 4 A's of schizophrenia described by Bleuler?
1. Ambivalence 2. Autism 3. Affect (blunted) 4. Associations (loose)
What is schizoaffective disorder?
a combination of schizophrenia and a mood disorder.
What is the lifetime prevalence of schizophrenia?
1.5% (males=females, blacks=whites)
Are genetic or environmental factors stronger in the etiology of schizophrenia
Genetic factors outweigh environmental factors
In one word, describe Clusters A, B, and C personality disorders.
A = weird B = wild C = worried
Describe a pt with a Cluster A personality disorder.
odd or eccentric, cannot develop meaningful social relationships.
What are 3 types of Cluster A personality disorders?
1. Paranoid 2. Schizoid 3. Schizotypal
What is a Paranoid personality disorder?
distrust and suspiciousness, projection is main defense mechanism
What is a Schizoid personality disorder?
voluntary social withdrawal, limited emotional expression
What is a Schizotypal personality disorder
interpersonal awkwardness, odd thought patterns and appearance
Personality disorders that lead pts to be erratic, emotional, or dramatic and have a genetic association with mood disorders
Cluster B
What are the 4 types of Cluster B personality disorders
1. Antisocial 2. Borderline 3. Histrionic 4. Narcissistic
Describe an antisocial personality disorder.
disregard for and violation of rights of others, crimilatiy, males more often affected than females.
Describe a borderline personality disorder
unstable mood and behavior, impulsiveness, sense of emptiness. women more often affected than men.
Describe a Histrionic personality disorder.
excessive emotionality, somatization, attention seeking, sexually provacative.
Describe a Narcissistic personality disorder.
grandiosity, sense of entitlement, may demand ""top"" physician, or best health care
Pts with personality disorders that leave them anxious or fearful and have a genetic association with anxiety disorders
Cluster C personality disorders
List 3 types of Cluster C personality disorders
1. Avoidant 2. Obsessive-Compulsive 3. Dependent
Describe an avoidant personality disorder.
sensitive to rejection, socially inhibited, timid, feelings of inadequacy
Describe OCD
preoccupation with order, perfectionism, and control
Describe a dependent personality disorder.
submissive and clinging, excessive need to be taken care of, low self confidence
What are Medicare and Medicaid?
federal health care programs that originated from amendments to the Social Security Act.
Who does MedicarE provide for?
The Elderly
Who does MedicaiD provide for?
The Destitute. Medicaid is federal and state assistance for very poor people.
Ethically, what do you do if your patient is non-compliant?
Work to improve the physician patient relationship.
Ethically, what do you do if your patient has difficulty taking medication?
Provide written instructions, attempt to simplify the treatment regimen.
What do you do if a 17 year old girl is pregnant and asks for an abortion.
informthe patient that most states require parental consent for minors for an abortion.
What do you do if a patient refuses a necessary procedure or desires and unnecessary one?
attempt to understand why the patient wants/does not want the procedure. address underlying concerns. avoid performing unnecessary procedures.
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.
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.
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.
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.
A child puts everything in their mouth. How old are they?
1st year of life.
An infant sits with support, how old is she?
4 months
An infant stands with help, how old is he?
8 months
A baby is crawling, how old is she?
9 months
A little girl just learned to walk on her own, how old is she?
13 months
A child has just learned to climb the stairs alone, how old is he?
18 months
At what age does an emergence of hand preference first appear?
18 months
A child has lots of energy, can walk backwards, turn doorknobs, unscrew jars, and scribble with crayons. How old is she?
2 years
A child can ride a tricycle, go up the stairs normally, draw recognizable figures and has just started toilet training. How old?
3 years.
A child can descend the stairs normally and hop on one foot. How old is she?
4 years
At what age will a child develop complete sphincter control (toilet trained)?
5 years
At 5 years of age, what percentage of the adult brain mass does the child have?
75.00%
A child has most of her permanent teeth, how old is he?
11 years
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.
At what age does the adolescent growth spurt usually kick in?
Around 12 years, earlier for girls than for boys.
A child plays patty cake and peek a boo, how old is she?
10 months
A baby is experiencing stranger anxiety, how old is he?
6 months
A baby has started showing signs of normal separation anxiety, how old is she?
1 year.
The parent is the central figure and issues of trust are key, how old is the child?
1st year of life.
A toddler will engage in parallel play, but ""no"" is still her favorite word, how old is she?
1 year
A toddler is selfish and self centered, aggressive, and tends to imitate mannerisms and activities, how old is he?
2 years
A baby can follow objects to midline, how old is she?
4 months
A baby is putting his feet in his mouth, how old is he?
5 months
A baby will approach a toy with one hand, and then change hands with the toy, how old is she?
1st year of life
A baby first laughs out loud, how old is she?
4 months
A baby has started saying ""ma-ma-ma"" and ""da-da-da"", how old is he?
10 months
In Piaget's Cognitive Development, at what age does a baby achieve object permanence?
1 year
A baby kicks and throws a ball, how old is he?
1 year
A baby can stack three cubes, how old is she?
18 months.
A toddler is using two word sentences and has a vocabulary of about 250 words, how old is he?
1 year
A toddler has started using pronouns and shows great variations in timing of language. How old is she?
2 years
A toddler is using complete sentences and has a vocabulary of 900 words, although he appears to understand 4x as many.
3 years
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%)
Common causes of urinary tract infections in the hospital
Mostly ascending infections 1. E. coli 2. Proteus 3. Klebsiella 4. Serratia 5. Pseudomonas
Risk factor for nosocomial CMV infection.
Newborn nursery
Risk factor for nosocomial RSV infection.
Newborn nursery
Risk factor for nosocomial E. coli infection.
Urinary catheterization
Risk factor for nosocomial Proteus mirablis infection.
Urinary catheterization
Risk factor for nosocomial Pseudomonas aeruginosa infection.
Respiratory therapy equipment
Risk factor for nosocomial HBV infection.
Work in renal dialysis unit
Risk factor for nosocomial Candida albicans infection.
Hyperalimentation
Risk factor for nosocomial Legionella infection.
Water aerosols
2 most common causes of nosocomial infections
1. E. coli (UTI) 2. S. aureus (wound infection)
What bug: Pus
Staphylococcus aureus
What bug: Empyema
Staphylococcus aureus (means pus in a natural body cavity, not an abscess)
What bug: Abscess
Staphylococcus aureus
What bug: Pediatric infection
Haemophilus influenzae
Most common causes of pneumonia in people with cystic fibrosis.
Pseudomonas aeruginosa
What bug: Branching rods in oral infection
Actinomyces israelii
What bug: Traumatic open wound infection
Clostridium perfringens
What bug: Surgical wound
Staphylococcus aureus
What bug: Dog or cat bite
Pasteurella multocida
What bug: Sepsis in a newborn
Group B Strep
What bug: Meningitis in a newborn
Group B Strep
What organism is associated w/ HLA-B27 spondyloarthropathy and uremic Sx?
Shigella
What is the MC contaminant of blood transfusions?
Yersenia enterocolitica
What are trophozoites phagocytosed RBCs?
Entameba histolytica (Ameba)
What organism causes chorioamnionitis?
Step. agalactiae
Most common: Hereditary bleeding disorder
von Willebrand's
Most common: Ovarian tumor (malignant)
Serous cystadenocarcinoma
Most common: Malignancy associated with noninfectious fever
Hodgkin's disease
Most common: Mets to bone
Breast, lung, thyroid, testes, prostate, kidney
Most common: Mets to brain
Lung, breast, skin (melanoma), kidney (RCC), GI
Most common: Breast tumor (benign)
Fibroadenoma
Most common: Brain tumor (kids)
Medulloblastoma (cerebellum)
Most common: Preventable cancer
Lung cancer
Most common: Leukemia (adults)
AML
Most common: Breast mass
Fibrocystic change (in postmenopausal wormen, carcinoma in the most common)
Most common: Location of brain tumors (kids)
Infratentorial
Most common: Sexually transmitted disease
Chlamydia
Most common: Pituitary tumor
Prolactinoma (2nd-somatotropic acidophilic adenoma)
Most common: Location of brain tumors (adults)
Supratentorial
Most common: Tumor of the adrenal medulla (kids)
Neuroblastoma (malignant)
Most common: Bacteria found in GI tract
Bacteroides (2nd most common is E. coli)
Most common: Kidney stones
Calcium=radiopaque (2nd most common is ammonium=radiopaque; formed by urease-positive organisms such as Protease vulgaris or Staph)
Most common: Bacteremia/pneumonia (IVDA)
S. aureus
Most common: Primary hyperparathyroidism
Adenomas (followed by hyperplasia, then carcinoma)
Most common: Breast cancer
Infiltrating ductal carcinoma (in the US, 1 in 9 women will develop breast cancer)
Most common: Site of metastasis (2nd most common)
Liver
Most common: Gynecologic malignancy
Endometrial carcinoma
Most common: Testicular tumor
Seminoma
Most common: Brain tumor (adults)
Mets>astrocytoma (including glioblastoma multiforme)>meningioma>schwannoma
Most common: Brain tumor-supratentorial (kids)
Craniopharyngioma
Most common: Skin cancer
Basal cell carcinoma
Most common: Ovarian tumor (benign)
Serous cystadenoma
Most common: Tumor in women
Leiomyoma (estrogen dependent)
Most common: Vasculitis
Temporal arteritis (risk of ipsilateral blindness due to thrombosis of ophthalmic artery)
Most common: Viral encephalitis
HSV
Most common: Bacteria associated with cancer
H. pylori
Most common: Tracheoesophageal fistula
Lower esophagus joins trachea/upper esphagus-blind pouch
Most common: Renal tumor
Renal cell carcinoma-associated with von Hippel-Lindau and acquired polycystic kidney disease; paraneoplastic syndromes
Most common: Bug in debilitated, hospitalized pneumonia patient
Klebsiella
Most common: Type of pituitary adenoma
Prolactinoma
Most common: Site of metastasis
Regional lymph nodes
Most common: Secondary hyperparathyroidism
Hypcalcemia of chronic renal failure
Most common: Nephrotic syndrome
Membranous glomerulonephritis
Most common: Helminth infection (U.S.)
Enterobius vermicularis (Ascaris lubricoides is 2nd most common)
Most common: Type of Hodgkin's
Follicular, small cleaved
Most common: Organ sending mets
Lung>breast, stomach
Most common: Primary liver tumor
Hepatoma
Most common: Organ receiving mets
Adrenal glands (due to rich blood supply)
Most common: Neoplasm (kids)
ALL (2nd most common is cerebellar medulloblastoma)
Most common: Tumor of infancy
Hemangioma
Most Frequent Cause of: Pancreatitis (chronic)
EtOH (adults), cystic fibrosis (kids)
Most Frequent Cause of: Hemochromatosis
Multiple blood transfusions (can result in CHF and increased risk of HCC)
Most Frequent Cause of: Congenital adrenal hyperplasia
21-hydroxylase deficiency
Most Frequent Cause of: Pneumonia, hospital-acquired
Klebsiella
Most Frequent Cause of: Primary hyperparathyroidism
Adenoma
Most Frequent Cause of: Primary hyperaldosteronism
Adenoma of adrenal cortex
Most Frequent Cause of: Aortic aneuyrysm, ascending
Tertiary syphilis
Most Frequent Cause of: Addison's
Autoimmune (infection is the 2nd most common cause)
Most Frequent Cause of: Bacterial meningitis (adults)
Streptococcus pneumoniae
Most Frequent Cause of: UTI (young women)
E. coli and Staphylococcus saprophyticus
Most Frequent Cause of: Bacterial meningitis (kids)
S. pneumoniae or Neisseria meningitidis
Most Frequent Cause of: Aortic aneurysm, abdominal and descending aorta
Atherosclerosis
Most Frequent Cause of: Peau d'orange
Carcinoma of the breast
Most Frequent Cause of: Hypopituitarism
Adenoma
Most Frequent Cause of: Dementia
Alzheimer's (2nd most common in multo-infarct)
Most Frequent Cause of: Right-sided heart failure
Left-sided heart failure
Most Frequent Cause of: PID
Neisseria gonorrhoeae (monoarticular arthritis)
Most Frequent Cause of: Bacterial meningitis (elderly)
S. pneumoniae
Most Frequent Cause of: Hepatic cirrhosis
EtOH
Most Frequent Cause of: Food poisoning
S. aureus
Most Frequent Cause of: Glomerulonephritis (adults)
IgA nephropathy (Berger's disease)
Most Frequent Cause of: SIADH
Small cell carcinoma of the lung
Most Frequent Cause of: Bacterial meningitis (newborns)
Group B streptococcus
Most Frequent Cause of: Pancreatitis (acute)
EtOH and gallstones
Most Frequent Cause of: Cancer associated with AIDS
Kaposi's sarcoma
Are D1 neurons in the basal ganglia inhibitory or excitatory?
Excitatory
What type of cells are Nissl bodies found? In what parts of the cell?
Are found in neurons. Are not found in axon or axon hillock.
What part of the hypothalamus (ant./post.) controls autonomic regulation?
anterior hypothalamus
How can a Nissl stain be used to differentiate microglia from oligodendroglia?
Microglia are not discernible in a Nissl stain while oligodendroglia appear as small dark nuclei with dark chromatin
What is the response to microglia infected with HIV?
fusion to form multinucleated giant cells in CNS
What part of the hypothalamus (ant./post.) controls cooling when hot?
anterior hypothalamus
What is the function of microglia?
Phagocytosis in CNS
What nucleus if typically lesioned in hemiballismus?
contralateral subthalamic nucleus
What is the function of oligodendroglia?
Myelination of multiple CNS axons
What nucleus of the hypothalamus controls sexual emotions?
septate nucleus
What midbrain structure is important in mitigating voluntary movements and making postural adjustments?
Basal Ganglia
Are D2 neurons in the basal ganglia inhibitory or excitatory?
Inhibitory
What is the 'gap' between the myelination segment of 2 Schwann cells called?
Node of Ranvier
What nucleus of the hypothalamus controls thirst and water balance?
supraoptic nucleus
What nucleus of the hypothalamus controls hunger?
lateral nucleus
What is the embryologic origin of microglia?
Mesoderm
What is the response of microglia to tissue damage?
transformation into large ameboid phagocytic cells
What nucleus of the hypothalamus controls circadian rhythms?
suprachiasmatic nucleus
What nucleus of the hypothalamus controls satiety?
ventromedial nucleus
What part of the hypothalamus (ant./post.) controls heat conservation when cold?
posterior hypothalamus
What is associated w/ Alzheimer's Dz?
Depression
What is the equation to calculate loading dose?
(Cp)(Vd)/F (note: Cp = target plasma concentration, and F = bioavailability)
What drugs should you avoid taking with cephalosporins?
Aminoglycosides (increases nephrotoxicity) and ethanol (causes a disulfiram-like rxn -- headache, nausea, flushing, hypotension)
These specific drugs disrupt fungal cell membranes
amphotericin B, nystatin, fluconazole/azoles (FAN the fungal cell membranes)
Which drug blocks mRNA synthesis?
Rifampin
When would you use aminoglycosides?
Against severe gram-negative rod infections.
How does a competitive inhibitor affect Km?
Increases
What is the equation to calculate the maintenance dose?
(Cp)(CL)/F (note: Cp = target plasma concentration, and F = bioavailability)
These drugs block nucleotide synthesis by interfering with the folate pathway
Sulfonamides (e.g. Bactrim), trimethoprim
These drugs disrupt the bacterial/fungal cell membranes
Polymyxins
What's the main difference between a partial agonist and a full agonist?
A partial agonist has a lower maximal efficacy
What should you watch out for when giving penicillin?
Hypersensitivity reaction (urticaria,severe pruritus) and hemolytic anemia
Bacitracin, vancomycin and cycloserine block the synthesis of this molecule, preventing cell wall synthesis.
Peptidoglycans
What can 3rd generation cephalosporin drugs do that 1st and 2nd generation can't?
Cross the blood brain barrier.
What is the mechanism of action of Pentamidine?
Unknown
What is the mechanism for penicillin type drugs?
Blocks bacterial cell wall synthesis by inhibition of peptidoglycan synthesis.
Which drugs are the bacteriacidal antibiotics?
Penicillin, cephalosporin, vancomycin, aminoglycosides, fluoroquinolones, metronidazole
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)
Azaothioprine is used to in what setting?
Kidney transplants, autoimmune disorders (glomerulonephritis, hemolytic anemia)
Recombinant Cytokine- Aldesleukin (interleukin-2) is used for?
Renal cell carcinoma, metastatic melanoma
Recombinant Cytokine- Erythropoietin (epoetin) is used for?
anemia
Recombinant Cytokine- Filgrastim is used for?
Recovery of Bone Marrow; it is a granulocyte colony stimulating factor
Recombinant Cytokine- alpha interferon is used for?
Hep B/C, Kaposi's sarcoma, leukemia, malgnant melanoma
Recombinant Cytokine- oprelvekin (interleukin2) is used for?
Thrombocytopenia
Recombinant Cytokine- sargamostim is used for?
Recovery of Bone Marrow (it is a granulocyte-macrophage colony stimulating factor)
Recombinant Cytokine- thrombopoietin is used for?
Thrombocytopenia
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
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
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.