White matter is composed of
A) ganglial sheaths.
B) bundles of myelinated axons.
C) collections of nerve cell bodies.
D) bundles containing both myelinated axons and nerve cell bodies.
E) collections of unmyelinated axons.

Question

Quizplus · Accepted Answer

White matter in the brain and spinal cord is primarily composed of bundles of myelinated axons, which are nerve fibers covered with a fatty substance called myelin that speeds up the transmission of electrical signals.

White Matter Is Composed of