Nokea
In infantile eczema:
- A. The rash is characteristically present at birth
- B. The papules are itchy
- C. Cold weather relieves the symptoms
- D. A family history of related disorders is elicited in 70% of cases
Correct Answer: B
Rationale: Infantile eczema is itchy and often associated with a family history of atopy. The rash is not present at birth, and cold weather can exacerbate symptoms.
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What are the four structural heart anomalies that make up the tetralogy of Fallot? (Select the four that apply.)
- A. Hypertrophied right ventricle
- B. Patent ductus arteriosus
- C. Ventral septal defect
- D. Narrowing of pulmonary artery
Correct Answer: D
Rationale: The four anomalies that comprise tetralogy of Fallot are hypertrophied right ventricle, patent ductus arteriosus, stenosis of pulmonary artery, and dextroposition of the aorta.
Regarding hand innervation:
- A. Median nerve supplies all thenar muscles except adductor pollicis
- B. The sensory supply to the dorsal surface of the medial two digits is via the radial nerve
- C. In ulnar nerve damage at the elbow there is sensory loss over the medial aspect of forearm proximal to the wrist
- D. Radial nerve provides the sensory innervation to the terminal areas of the dorsal surfaces of the lateral three digits
Correct Answer: A
Rationale: The median nerve innervates most thenar muscles, except for the adductor pollicis, which is supplied by the ulnar nerve.
Guillain-Barre syndrome (GBS) is excluded by:
- A. A normal CSF
- B. The presence of autonomic neuropathy
- C. Distinct sensory level
- D. Ophthalmoplegia
Correct Answer: C
Rationale: A distinct sensory level is not a feature of GBS, which typically presents with ascending symmetrical weakness and absent reflexes.
Renin:
- A. Is secreted mainly in extrarenal tissues
- B. Secretion increases on lying supine
- C. Secretion increases with potassium
- D. Converts angiotensin I into angiotensin II
Correct Answer: D
Rationale: Renin is an enzyme produced by the kidneys that converts angiotensin I into angiotensin II which plays a key role in regulating blood pressure and fluid balance. The other options are incorrect because renin is not mainly secreted in extrarenal tissues its secretion does not increase on lying supine or with potassium and it does not regulate osmolality.
Which is a common, serious complication of rheumatic fever?
- A. Seizures
- B. Cardiac arrhythmias
- C. Pulmonary hypertension
- D. Cardiac valve damage
Correct Answer: D
Rationale: Cardiac valve damage is the most significant complication of rheumatic fever. Seizures, cardiac arrhythmias, and pulmonary hypertension are not common complications of rheumatic fever.