Neuroscientists often categorize parts of the brain into gray matter and white matter. What makes the white matter regions appear white?
A) It contains only dendrites.
B) It is composed of myelinated axons.
C) It produces a natural bleaching chemical.
D) It contains only white cell bodies.

Question

Quizplus · Accepted Answer

White matter appears white because it is composed of myelinated axons. The white color comes from the fatty substance called myelin that surrounds and insulates the axons, allowing for faster transmission of neural signals.

Neuroscientists Often Categorize Parts of the Brain into Gray Matter