Most common cause of severe mental retardation is:

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Pediatric Nursing Cardiac Practice Questions Questions

Question 1 of 5

Most common cause of severe mental retardation is:

Correct Answer: A

Rationale: Chromosomal disorders , like Down syndrome, are the top cause of severe mental retardation due to prevalence and impact (CDC). B-E are less frequent.

Question 2 of 5

All of the following statements are true except:

Correct Answer: A

Rationale: Choice A is false; gloves don’t replace handwashing (CDC). B-E are true.

Question 3 of 5

The triad of NEC is:

Correct Answer: C

Rationale: NEC triad is prematurity, formula feedings, and ischemia , per AAP. A, B, D, E miss key elements.

Question 4 of 5

A 6-month-old boy appears with fever, wheezing, and respiratory distress following an upper respiratory infection (URI). Physical examination reveals bilateral wheezing, subcostal retractions, and nasal flaring. Most likely diagnosis is:

Correct Answer: D

Rationale: Bronchiolitis is typical at 6 months post-URI with bilateral wheezing and distress, per AAP. Asthma is rare this young, and A, B, E are less likely.

Question 5 of 5

Best therapy to reduce ciliary damage in patients with cystic fibrosis is:

Correct Answer: C

Rationale: Dornase alfa reduces ciliary damage in cystic fibrosis by breaking down mucus, per CFF. A, B, D, E target other aspects.

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