Why are action potentials usually conducted in one direction?
A) The nodes of Ranvier conduct potentials in one direction.
B) The brief refractory period prevents reopening of voltage-gated sodium channels.
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 brief refractory period, the voltage-gated sodium channels cannot be reopened, which prevents the backward propagation of action potentials. Thus, action potentials can only be conducted in one direction.

Why Are Action Potentials Usually Conducted in One Direction