The belief that major structural brain development is completed in childhood is outdated. Neuromaturation continues into the

Correct Answer: C

Rationale: Neuromaturation extends well into the third decade of life, impacting cognitive and emotional regulation.

Correct Answer: A

Rationale: The correct answer is A because the bones surrounding the posterior fontanel typically fuse and close by age 6 to 8 weeks. This closure is a normal part of infant development.

Correct Answer: A

Rationale: Obstructive shock results from physical blockage of blood flow, such as cardiac tamponade or pulmonary embolism, impairing ventricular output.

Correct Answer: D

Rationale: Chlamydia trachomatis is a frequent cause of afebrile pneumonia in infants, typically acquired during birth.

Correct Answer: C

Rationale: Neuromaturation extends well into the third decade of life, impacting cognitive and emotional regulation.