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50 Cards in this Set
- Front
- Back
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Marfan's syndrome is a genetic defect in what protein?
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Fibrillin
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A 18-year old femal complains of intermittent cramp abdominal pain, vomiting, and occasional gross blood in the stool. The patient has developed brown-pigmented spots around her lips, gums, and mucous membranes in the mouth. The x-ray that your child's parents brought with her reveals gastrointestinal polyposis. Diagnostic tests show a depressed iron serum level.
What is the Most likely diagnosis that explains the signs and symptoms over the last month? |
Peutz-Jeghers syndrome
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Each of the following organisms causes diarrheal diseases Except one.
a) Shigella dysenteriae b) Enterococcus faecium c) Salmonella typhi d) Campylobacter jejuni e) Helicobacter pylori |
Enterococcus faecium
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A 11 year old girl just returned from a camping trip with easily bruised skin, skin discoloration, bleeding gums, and wounds presents for oral prophylaxis. Upon taking the medical history, the dentist learns that the patient shows clinical signs of malnutrition. After interrogation to gather information on the patient's daily food intake, the dentist comes to realize that the patient has a diet deficient in copper.
The patient has recently returned from a camping trip and presents with a fever of 103 degrees, severe headaches, and muscular pain for a few days. Your patient developed small, flat and pink macules on the forearms, wrists , and ankles and it eventually became maculopapular and petechial as it spread. What is the most probable etiological agent? |
Rickettsia rickettsii
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A 11 year old girl just returned from a camping trip with easily bruised skin, skin discoloration, bleeding gums, and wounds presents for oral prophylaxis. Upon taking the medical history, the dentist learns that the patient shows clinical signs of malnutrition. After interrogation to gather information on the patient's daily food intake, the dentist comes to realize that the patient has a diet deficient in copper.
Diagnostic studies show that the etiologic agent that is causing fever, headache and muscular pain in the child does not have flagella. Which of the following does not describe flagella in bacteria? a) fimbriae and pili may contribute to the pathogenicity of a bacterium b) in petrichously flagellated bactera, all the flagella turn in the same direction c) the bacterial flagellum in anchored to the cell through its basal body structure d) depending on the type of metabolism being carried out, energy needed to turn bacterial flagella can be either ATP or proton motive force e) antibodies made to flagellin can be used to serotype flagellated bacteria |
depending on the type of metabolism being carried out, energy needed to turn bacterial flagella can be either ATP or proton motive force
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a 64 year old patient develops massive proteinuria. The patient has been treated with penicillamine for past 14 months. It has been observed that the glomerular basement membrane is thickening due to deposition of an irregular mass between the basement membrane and overlying epithelial cells. Immunofluorescence examination reveals granular deposition of both
a) membranous glomerulonephritis b) focal segmental glomerulosclerosis c) crescentic glomerulonephritis d) diffuse proliferative glomerulonephritis e) membranoproliferative glomerulonephritis |
Membranous glomerulonephritis
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A type of spore that is produced during asexual reproduction in fungi is?
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Blastospores
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A patient has contracted Scarlet fever caused by streptococcus pyogenes. Which of the following is not associated with Scarlet fever?
a) Urinary infection b) Pharyngitis c) Impetigo d) Otitis media e) Cellulitis |
Urinary infection
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Which of the following is Not likely to be an important factor in the development of damage to cell membranes?
a) Increased intracellular sodium b) Phospholipid loss from membranes c) Cytoskeletal injury d) Increase incytosolic calcium e) Toxic oxygen radicals |
Increased intracellular sodium
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The general mechanism of action for erythromycin is by?
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Disruptuing synthesis of proteins
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Each of the following conditions can cause Cor pulmonale Except one.
a) Pulmonary stenosis b) Primary pulmonary hypertension c) Interventricular septal defect d) Aortic stenosis e) Chronic recurrent pulmonary emboli |
Aortic stenosis
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Each of the following symptoms can be displayed by an individual with trisomy 21 except one?
a) flat nasal bridge b) protruding tongue c) retrognathia d) brachycephaly e) Hypotonia |
Retrognathia
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The dentist notices diminished voice sounds from a frequently visiting patient. The dentist percusses the lungs and observes hyperresonant sounds as well as diminished vesicular breath sounds. Which of the following is Most likely the patients pulmonary disorder?
a) Emphysema b) Pulmonary edema c) Pleural effusion d) Atelectasis e) Pneumonia |
Emphysema
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Each of the following viruses produces multinucleated giant cells during their infectious process Except one?
a) measles virus b) varicella-zoster virus c) herpes symplex virus d) mumps virus e) coronavirus |
Coronavirus
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Which of the following is most likely to give rise to a pleomorphic adenoma?
a) tongue b) parotid gland c) buccal mucosa d) lip e) submaxillary salivary gland |
Parotid gland
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What acts as a superantigen by activating large numbers of T lymphocytes?
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Toxic shock syndrome toxin
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When is Prevotella intermedia first detected in the oral cavity?
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At adolescence
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The most important mediator of delayed type hypersensitivity in tuberculosis is?
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Interferon Gamma
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Each of the following can cause megakaryocytic thrombocytopenia except one?
a) Aplastic anemia b) Systemic lupus erythematosus c) Disseminated intravascular coagulation d) Idiopathic thrombocytopenic purpura |
Aplastic Anemia
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Each of the following are characteristic of the influenza virus Except one?
a) Influenza virus encodes viral neuraminidase protein b) Influenza virus surface glycoproteins undergo antigenic drift c) Influenza virus surface glycoproteins undergo antigenic shift d) Influenza virus viral RNA polymerase (transcriptase) has "capping" ability e) Influenza virus some viral mRNAs are produced by mRNA splicing |
Influenza virus viral RNA polymerase (transcriptase) has "capping" activity
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Each of the following are correct about bacteria Except one.
a) Porins enables active transport of molecules across the outer cell wall layer of Gram negative bacteria b) Teichoic acids are not present in the cell wall of Gram-negative bacteria c) Lipopolysaccharide, specifically the polysaccharide that comprises the O-polysaccharide region, is the major antigenic determinant on the surface of Gram-negative d) Endotoxin is a component of the outer cell wall of all Gram-negative bacteria e) The cell wall of Gram-positive bacteria appears as an amorphous single layered structure, but is composed of many layers of peptioglycan. |
Porins enables active transport of molecules across the outer cell wall layer of Gram negative bacteria
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What areas are most likely to give rise to a lymphoma in the oral cavity?
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Pharynx and Palate
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The toxic portion of lipopolysaccharide is the?
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Lipid A
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Which type of hypersensitivity causes the symptoms of lupus?
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Type III
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A dentist decides to take a tuberculin skin test for preventative measures. The nurse informs the dentist that he has a positive tuberculin test and must take appropriate action. Which of the following types of hypersensitivity is demonstrated by the local reaction that occurs in a positive tuberculin skin test?
a) Type I b) Type II c) Type III d) Type IV |
Type IV
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Health care workers such as dentists can be exposed to many biological and chemical agents. Health care workers are exposed to which of the following hazards that presents with irritation of the skin and mucous membrane and ultimately cause neuropathy and leukemia?
a) Ethylene oxide b) Chromium c) Silicon dioxide d) Ultraviolet light |
Ethylene oxide
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A dentist conducts a medical history the morning after a patient's gastrectomy. The dentist uses a digital thermometer to measure the temperature of the mouth and it reads 102 degrees. The patient appears to show signs of tachycardia. What is the most likely diagnosis?
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Atelectasis
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Which of the following roles does isopropyl alcohol play in the dental environment?
a) used as a sporicidal agent b) used as a skin antiseptic c) used as an alkylating agent to act as a disinfectant d) used for sterilization purposes |
Used as a skin antiseptic
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Complete lack of the enzyme hypoxanthine-guanine phosphoribosyl transferase will result in which of the following diseases?
a) Gout b) Lesch-Nyhan syndrome c) Combined immunodeficiency syndrome d) Tay-Sachs disease e) Pernicious anemia |
Lesch-Nyhan syndrome
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Acute pyelonephritis in patients without any urological abnormalities is most commonly caused by?
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Escheria coli
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Each of the following replicates their viral genome in the cytoplasm of infected cells Except?
a) Arenaviruses b) Rabies virus c) Cytomegalovirus d) Poliovirus e) Measles virus |
Cytomegalovirus
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What virus is Most commonly associated with aseptic meningitis?
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Coxsackie virus
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Which of the following interferons is secreted by Th1 cells and cytotoxic T lymphocytes to activate natural killer cells and macrophages?
a) Interferon alpha b) Interferon beta c) Interferon gamma d) Interferon alpha, Interferon beta, and Interferon gamma |
Interferon gamma
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Each of the following describes the function of an interleukin Except one.
a) IL-5 causes proliferation of activated B cells and enhances class switching of IgA b) IL-3 inhibits activity and release of inflammatory cytokines by macrophages c) IL-8 causes activation of neutrophils to release lysosomal enzymes d) IL-10 inhibits IL-2 and Interferon gamma production by T helper cells e) IL-7 functions as a growth factor for both B and T cell proliferation |
IL-3 inhibits activity and release of inflammatory cytokines by macrophages
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The cytokine which is shown to be an important regulator of inflammatory response by inhibiting the release of inflammatory cytokines synthesized by macrophages is?
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IL-10
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Which of the following sites of the GI system is most susceptible for a malignant lymphoma?
a) Duodenum b) Colon c) Ileum d) Stomach e) Esophagus |
Stomach
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A patient is unable to produce IgA and therefore would be expected to have bacterial infections of the?
a) pancreas b) intestinal tract c) liver d) brain e) heart |
Intestinal Tract
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What is an agent that alkylates various cell components in a microbial cell?
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Gluteraldehyde
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In the US the greatest number of cancer deaths in women is caused by?
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Lung cancer
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Which of the following components of Streptococcus oneumoniae renders it to be resistant to phagocytosis from host cell?
a) Capsular polysaccharide b) M protein c) Lipopolysaccharide d) Cell wall e) IgA protease |
Capsular Polysaccharide
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Each of the following describes von Willebrand disease Except?
a) Prolonged bleeding time b) Impaired platelet adhesion c) Deficiency in Factor VIII d) Promotes platelet aggregation e) Decreased partial thromboplastin time |
Decreased partial thromboplastin time
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Mycoplasma pneumoniae is resistant to penicillin because?
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Lack of a cell wall
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Rheumatic fever chiefly occurs following beta-hemolytic streptococcal infection of which of the following?
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Pharynx
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T lymphocytes mature in the?
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Thymus
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Bacterial replication requires gyrase to?
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Relieve positive supercoiling ahead of the replication fork
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What area of the oral cavity is most likely to give rise to an oral squamous cell carcinoma?
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Floor of mouth and lateral tongue
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Hyperparathyroidism can cause which of the following disorders?
a) osteitis fibrosa cystica b) myxedema c) rickets d) osteomalacia e) acromegaly |
osteitis fibrosa cystica
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Which of the following mechanisms does Not directly involve DNA methylation?
a) SOS response b) Mismatch repair c) Protection against restriction enzymes d) methyl transferase repair |
SOS response
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A patient with AIDS comes to your office for an oral prophylaxis. Each of the following are clinical manifestations of an individual with AIDS except?
a) Candidiasis b) Oral hairy leukoplakia c) Kaposi's sarcoma d) Major apthous ulcers e) Chronic desquamative gingivitis |
Chronic dequamative gingivitis
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Each of the following produces an exotoxin important for the bacteria's pathogenicity Except?
a) Typhoid fever b) Scarlet fever c) Clostridium tetani d) Salmonella typhi e) Staphylococcus aureus |
Typhoid fever
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