Nokea
Which of the following skills would be expected of a 7-month-old infant but not of a 5-month-old infant?
- A. Crawls
- B. Smiles socially
- C. Controls bowel and bladder
- D. Sits unsupported
Correct Answer: D
Rationale: A 7-month-old can typically sit unsupported, while a 5-month-old cannot. Crawling and social smiling develop earlier, and bowel control is not expected at this age.
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Which of the following has the highest proportion of etiology of congenital malformations?
- A. Maternal infections
- B. Maternal illness
- C. Environmental agents
- D. Monogenic inheritance
Correct Answer: D
Rationale: Monogenic inheritance accounts for the highest proportion of congenital malformations.
The following conditions can present in a newborn infant as a bullous eruption:
- A. Syphilis
- B. Mast cell disease
- C. Epidermolysis bullosa
- D. Phenylketonuria
Correct Answer: C
Rationale: Epidermolysis bullosa is a genetic condition causing blistering of the skin. Syphilis and mast cell disease can also cause bullous eruptions, but phenylketonuria does not.
The ECG in left ventricular hypertrophy and shows a superior QRS axis (between -90' and 0')
- A. tricuspid atresia
- B. Ebstein anomaly
- C. pulmonary atresia
- D. tetralogy of Fallot
Correct Answer: D
Rationale: Left ventricular hypertrophy with a superior QRS axis is characteristic of tetralogy of Fallot.
Renal childhood diseases responsible for chronic hypertension include
- A. nephrotic syndrome
- B. hemolytic uremic syndrome
- C. acute tubular necrosis
- D. congenital dysplastic kidney
Correct Answer: D
Rationale: Congenital dysplastic kidney is a common cause of chronic hypertension in children.
Regarding malaria:
- A. Plasmodium ovale has an exoerythrocytic cycle
- B. Plasmodium malariae does not occur after 5 years of primary illness
- C. Chloroquine is useful for prophylaxis of falciparum malaria in all areas of the world
- D. Primaquine is used to eradicate falciparum malaria
Correct Answer: A
Rationale: Plasmodium ovale has both an exoerythrocytic (liver) and erythrocytic (blood) cycle, which is a characteristic of this species of malaria parasite.