What Axonal Characteristic Facilitates the Propagation of an Action Potential

question 17

Multiple Choice

What axonal characteristic facilitates the propagation of an action potential along a myelinated axon?

• A) Voltage-gated Na⁺ and K⁺ channels are concentrated in the myelinated axonal segments.
• B) Voltage-gated Na⁺ and K⁺ channels are concentrated in the unmyelinated axonal segments.
• C) Voltage-gated Na⁺ channels are concentrated in the myelinated axonal segments; voltage-gated K⁺ channels are concentrated in the unmyelinated axonal segments.
• D) Voltage-gated K⁺ channels are concentrated in the myelinated axonal segments; voltage-gated Na⁺channels are concentrated in the unmyelinated axonal segments.
• E) Voltage-gated Na⁺ K⁺ channels are spread evenly throughout both myelinated and unmyelinated segments.

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