Why Do Action Potentials Usually Travel Unidirectionally Down an Axon

question 19

Multiple Choice

Why do action potentials usually travel unidirectionally down an axon?

• A) Delayed activation of K⁺ channels
• B) Inactivation of Na⁺ channels
• C) Myelin prevents travel in the opposite direction.
• D) Action potentials are all-or-none.

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