In human physiology, what is the functional role of myelin sheaths surrounding peripheral nerve axons?
Answer and explanation
Correct answer: A. Increases the velocity of nerve impulse transmission via saltatory conduction
- Step 1: Myelin acts as an electrical insulator, forcing the action potential to jump between nodes of Ranvier (saltatory conduction), greatly accelerating propagation. Answer: Increases the velocity of nerve impulse transmission via saltatory conduction. Why not the others: Myelin does not synthesize neurotransmitters.
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