The action potential is best defined as:
A) the amount of serotonin that can cross the axon's membrane.
B) the +3- to +7-volt capacity of a typical motor neuron.
C) the ability of a motor neuron to either contract or relax a muscle group.
D) a brief electrical impulse that transmits information along the axon of a neuron.

Question

Quizplus · Accepted Answer

The action potential is a brief electrical impulse that travels along the axon of a neuron, allowing for the transmission of information between neurons or from neurons to muscles. It is initiated by a depolarization of the neuron's membrane, which causes voltage-gated ion channels to open and allow for the influx of positively charged ions like sodium, leading to a rapid depolarization and the propagation of the action potential down the axon.

The Action Potential Is Best Defined As