The speed of an action potential depends upon
A)whether an axon is myelinated or not myelinated.
B)thickness of the myelin sheath.
C)the diameter of the axon.
D)All of the choices are correct.

Question

Quizplus · Accepted Answer

The speed of an action potential is dependent on both myelination status and the diameter of the axon. The myelin sheath contributes to saltatory conduction, which increases the speed of the signal propagation. On the other hand, a larger diameter of the axon decreases the resistance to the flow of ions, allowing faster movement of the signal. Therefore, both factors contribute to the speed of action potential propagation.

The Speed of an Action Potential Depends Upon