The difference between myelinated and unmyelinated axons in the PNS is that
A) Schwann cells are not associated with unmyelinated axons.
B) Schwann cells form more widely spaced nodes of Ranvier in unmyelinated axons.
C) Schwann cells simultaneously surround multiple axons in myelinated axons.
D) Schwann cells wrap around myelinated axons in concentric layers.

Question

Quizplus · Accepted Answer

Schwann cells wrap around myelinated axons in concentric layers, forming the myelin sheath that insulates the axon and increases the speed of nerve impulse transmission.

The Difference Between Myelinated and Unmyelinated Axons in the PNS