Which of the following occurs first during an action potential?
A) Many sodium ions flow into the neuron.
B) Voltage-gated sodium channels open.
C) A local disturbance triggers the resting voltage to exceed the threshold level.
D) The interior of the neuron becomes positive.
E) The interior of the neuron becomes negative.

Question

Quizplus · Accepted Answer

An action potential begins when a local disturbance causes the resting membrane potential to exceed the threshold level, triggering the opening of voltage-gated sodium channels.

Which of the Following Occurs First During an Action Potential