In myelinated nerve fibers, where do action potentials occur?
A) underlying myelin sheath
B) nodes of Ranvier
C) cell body
D) oligodendrocyte
E) Schwann cell

Question

Quizplus · Accepted Answer

Action potentials in myelinated nerve fibers occur at the nodes of Ranvier, which are the gaps between the myelin sheath segments. This allows for saltatory conduction, where the action potential jumps from node to node, increasing the speed of nerve impulse transmission.

In Myelinated Nerve Fibers, Where Do Action Potentials Occur