White matter
A) decreases steadily throughout childhood.
B) consists largely of myelinated nerve fibers.
C) does not exist in the prefrontal cortex.
D) contains mostly of neurons and supportive material.

Question

Quizplus · Accepted Answer

White matter consists largely of myelinated nerve fibers, while gray matter contains mainly neuron cell bodies and non-myelinated fibers. White matter is present in all parts of the brain, including the prefrontal cortex. Its amount increases during childhood due to the process of myelination.

White Matter