Increase in brain weight during the preschool years is due
A) primarily to the thickening of the skull.
B) in large part to increasing myelination of nerve fibers.
C) primarily to increases in the size of the cerebellum.
D) to increases in the size of the muscles that support the skull.

Question

Quizplus · Accepted Answer

The increase in brain weight during the preschool years is largely due to the increasing myelination of nerve fibers. Myelination helps to speed up the transmission of neural signals, contributing to the rapid development of cognitive and motor skills during early childhood.

Increase in Brain Weight During the Preschool Years Is Due