The myelin sheath is an insulating layer of fatty material composed of:
A)dendrites.
B)pyramidal cells.
C)axons.
D)glial cells.

Question

Quizplus · Accepted Answer

The myelin sheath is composed of glial cells, specifically oligodendrocytes in the central nervous system and Schwann cells in the peripheral nervous system. These cells wrap around the axons of neurons, forming the myelin sheath, which helps to insulate and speed up the transmission of electrical signals along the axon. Dendrites and pyramidal cells are types of neuronal cell bodies, but they do not contribute to the formation of the myelin sheath.

The Myelin Sheath Is an Insulating Layer of Fatty Material