Sara, age 4 months, was born at 35 weeks of gestation. She seems to be developing normally, but her parents are concerned because she is a more difficult baby than their other child, who was term. The nurse should explain that:

Correct Answer: A

Rationale: Infant temperament has a strong biologic component and is part of their unique characteristics. Sara's behavior is likely influenced by her individual temperament, not by failure to bond or painful experiences in the neonatal period.

Correct Answer: B

Rationale: Indomethacin, a nonsteroidal anti-inflammatory drug, is used to help close a patent ductus arteriosus in preterm infants by inhibiting prostaglandins, which are involved in maintaining the ductus open.

Correct Answer: C

Rationale: Absence of a central pulse (carotid or femoral) confirms cardiac arrest. Peripheral pulses may be weak in shock, but loss of a central pulse requires immediate resuscitation efforts.

Correct Answer: D

Rationale: This is an anaphylactic reaction (a form of immunological shock) that occurs post-vaccination.

Correct Answer: C

Rationale: Galactosemia does not typically cause hyperinsulinemic hypoglycemia