In a myelinated axon, action potentials are produced
A) only at the axon hillock.
B) only at the axon hillock and at the nodes of Ranvier.
C) along the entire length of the axon membrane.
D) only under segments of myelin.

Question

Quizplus · Accepted Answer

In a myelinated axon, action potentials are produced at the axon hillock and at the nodes of Ranvier. The myelin sheath insulates and increases the speed of transmission of the action potential, but the nodes of Ranvier are the only places where ion channels are present and the action potential can be regenerated.

In a Myelinated Axon, Action Potentials Are Produced