In myelinated axons the voltage-regulated sodium channels are concentrated at the nodes of Ranvier.

Name: In myelinated axons the voltage-regulated sodium channels are concentrated at the nodes of Ranvier.
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In myelinated axons, the voltage-regulated sodium channels are clustered at the nodes of Ranvier, which are the small gaps between the myelin sheaths. This allows for saltatory conduction, where the action potential jumps between nodes and speeds up the conduction of the nerve impulse.

In Myelinated Axons the Voltage-Regulated Sodium Channels Are Concentrated at the Nodes