The presence of ________ dramatically increases the speed at which an action potential moves along an axon.
A) a capsule
B) plasma protein
C) neurilemma
D) glial cells
E) myelin

Question

Quizplus · Accepted Answer

Myelin is a fatty substance that wraps around an axon, creating a myelin sheath. This myelin sheath acts as an insulator, preventing the loss of electrical energy as an action potential travels along the axon. This allows the action potential to move more quickly, increasing the speed at which signals are transmitted in the nervous system.

The Presence of ________ Dramatically Increases the Speed at Which