When a nerve impulse travels along an axon at about 200 miles per hour, then you know that
A) polarization has begun.
B) an action potential is occurring.
C) a negative after-potential has been completed.
D) a synaptic potential is impossible.

Question

Quizplus · Accepted Answer

An action potential is a rapid and brief electrical signal that travels along the axon of a neuron, allowing for communication between neurons or between neurons and muscles. The speed of an action potential can vary, but generally it travels at about 50-100 meters per second, which is roughly equivalent to 200 miles per hour. Therefore, if a nerve impulse is traveling at this speed, it is likely that an action potential is occurring. Choices A, C, and D are not correct because polarization, after-potentials, and synaptic potentials are all different processes that occur before or after an action potential, and are not directly related to the speed of conduction.

When a Nerve Impulse Travels Along an Axon at About