Nokea
In systemic mastocytosis:
- A. Areas of depigmentation occur
- B. Intermittent flushing is seen
- C. IgE levels are high
- D. Is relieved by aspirin
Correct Answer: B
Rationale: Intermittent flushing is a recognized symptom of systemic mastocytosis due to the release of histamine and other chemicals from mast cells.
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The following enzymes and inhibitors are matched correctly:
- A. Xanthine oxidase-allopurinol
- B. Enolase-fluoride
- C. Cholinesterase-physostigmine
- D. Ceruloplasmin-penicillamine
Correct Answer: A
Rationale: Xanthine oxidase-allopurinol: Allopurinol inhibits xanthine oxidase, which plays a role in purine metabolism, and is used to treat gout and prevent uric acid buildup.
Sudden death in an athlete immediately after forceful blunt trauma to the chest is most likely
- A. commotio cordis
- B. myocardial infarction
- C. lacerated coronary artery
- D. ruptured cardiac tendineae
Correct Answer: A
Rationale: Commotio cordis occurs due to sudden arrhythmias triggered by chest trauma during a vulnerable phase of the cardiac cycle.
Depending on the frequency and severity of hypercyanotic attacks in tetralogy of Fallot, all the following procedures are true EXCEPT
- A. placement of the infant in the knee-chest position
- B. administration of oxygen
- C. injection of morphine subcutaneously
- D. rapid correction with intravenous sodium bicarbonate
Correct Answer: D
Rationale: Intravenous sodium bicarbonate is not typically used for hypercyanotic attacks.
Isovolumic contraction phase of ventricular systole occurs during which of the following phases of central venous pressure, approximately
- A. From nadir of y descent to peak of a wave
- B. From peak of a wave to trough of x wave
- C. From trough of x wave to peak of c wave
- D. From peak of c wave to trough of x' descent
Correct Answer: C
Rationale: Isovolumic contraction occurs from the trough of the x wave to the peak of the c wave.
Examples of encapsulated organisms are all except:
- A. Pseudomonas
- B. Proteus
- C. Pneumococci
- D. Salmonella
Correct Answer: A
Rationale: The correct answer is A because Pseudomonas is not an encapsulated organism. The other options (b-e) are encapsulated.