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

Question

Quizplus · Accepted Answer

During the brief refractory period, the voltage-gated Na+ channels that have opened cannot be immediately reopened, preventing the backwards flow of the action potential. Therefore, the action potential can only be conducted in one direction along the axon.

Why Are Action Potentials Usually Conducted in Only One Direction