In a myelinated axon,Na⁺ channels are A)along the whole length of the axon. B)every 5 mm. C)concentrated at the nodes of Ranvier. D)less numerous at the nodes of Ranvier.

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Quizplus · Accepted Answer

Na⁺ channels are concentrated at the nodes of Ranvier in myelinated axons. This is where the myelin sheath is interrupted and allows for saltatory conduction, increasing the speed of nerve impulse transmission. While there may be some channels along the whole length of the axon, they are more numerous at the nodes of Ranvier.

In a Myelinated Axon,Na+ Channels Are

In a Myelinated Axon,Na⁺ Channels Are