Action potential propagation is the fastest in ____.
A) a myelinated axon with a small diameter
B) an unmyelinated axon with a small diameter
C) a myelinated axon with a large diameter
D) an unmyelinated axon with a large diameter
E) all myelinated axons regardless of diameter

Question

Quizplus · Accepted Answer

Action potential propagation is the fastest in a myelinated axon with a large diameter because myelination reduces electrical resistance across the axonal membrane, allowing the action potential to jump between nodes of Ranvier (saltatory conduction), and a larger diameter reduces the internal resistance to the flow of ions within the axon.

Action Potential Propagation Is the Fastest in ____