Why are action potentials usually conducted in one direction? A)Ions can flow along the axon in only one direction. B)Voltage-gated Na⁺ channels are inactivated during the refractory period. C)The axon hillock has a higher membrane potential than the terminals of the axon. D)Voltage-gated channels for both Na⁺ and K⁺ open in only one direction.

Question

Quizplus · Accepted Answer

During the refractory period, voltage-gated Na⁺ channels are inactivated, preventing the action potential from flowing backward. Therefore, the action potential can only propagate in one direction.

Why Are Action Potentials Usually Conducted in One Direction