The parents of a 9-month-old infant tell the nurse that they have noticed foods such as peas and corn are not completely digested and can be seen in their infant's stools. The nurse's explanation of this is based on which of the following?

Correct Answer: D

Rationale: The correct answer is D because the incomplete digestion of solid foods in the stools of a 9-month-old infant is normal due to the immaturity of the digestive tract at this age. It is a common occurrence in infants and does not necessarily indicate a problem.

Correct Answer: D

Rationale: Methylxanthines decrease pulmonary vascular resistance, not increase it. The other options are therapeutic effects of methylxanthines.

Correct Answer: C

Rationale: Antenatal exposure to magnesium sulfate is not associated with poor academic performance; it is used to protect against cerebral palsy. The other factors are known to impact neurodevelopment.

Correct Answer: C

Rationale: Thick nasal secretions, especially yellow or green, suggest bacterial infection, differentiating it from allergic rhinitis, which usually presents with clear nasal discharge.

Correct Answer: A

Rationale: Neonatal sepsis presents with non-specific symptoms such as poor feeding, lethargy, temperature instability, and respiratory distress. Early diagnosis and antibiotic treatment are critical to prevent serious complications.