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.

Question

Quizplus · Accepted Answer

Sodium channels inactivate very soon after they open. This leads to the inability of an action potential to travel in the direction the action potential was started.

Why Do Action Potentials Usually Travel Unidirectionally Down an Axon