Nokea
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.
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One-year-old child:
- A. Holds a raisin with a finger and thumb
- B. Drinks with a straw
- C. Tells six words with meaning
- D. Can move around holding onto furniture (cruising)
Correct Answer: D
Rationale: By one year of age, most children can cruise (move around while holding onto furniture), a key milestone in motor development.
False statements include:
- A. Curosurf is a natural surfactant
- B. Antenatal steroids are usually given as two oral doses of dexamethasone
- C. Increasing the rate on the ventilator raises the mean airway pressure
- D. CPAP is a common weaning tool in ventilated pre terms
Correct Answer: B
Rationale: The correct answer is B because antenatal steroids are typically given intramuscularly, not orally. The other options (a, c, d, e) are true statements.
Closure of ductus will worsen following conditions
- A. Coarctation of Aorta
- B. TGA without VSD
- C. Pulmonary Atresia
- D. Hypoplastic left heart
Correct Answer: C
Rationale: Closure of the ductus arteriosus worsens pulmonary atresia by cutting off pulmonary blood flow.
All the following antimalarials act by forming heme complexes which are toxic to the parasite except
- A. Primaquine
- B. Chloroquine
- C. Mefloquine
- D. Quinidine
Correct Answer: A
Rationale: Primaquine does not act by forming heme complexes; it works through a different mechanism.
Absent jugular venous pulsations are described in patients with
- A. Atrial paralysis
- B. Budd Chiari syndrome
- C. Endomyocardial fibrosis with giant right atrium
- D. Fontan procedure
Correct Answer: D
Rationale: Absent jugular venous pulsations are described in patients with the Fontan procedure due to the absence of a right atrial pump.