White matter is composed ofa. 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.
bundles of myelinated axons.
The correct answer is b. bundles of myelinated axons.
White matter refers to the regions of the central nervous system (CNS) that are made up of myelinated axons. Myelin is a fatty substance that surrounds and insulates nerve fibers, allowing for faster and more efficient transmission of nerve impulses. The white color of white matter comes from the myelin sheaths surrounding the axons, which gives it a pale appearance. In contrast, gray matter contains primarily nerve cell bodies and dendrites, which lack myelin and gives it a grayish appearance.
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