Question

a ________ is the electrical signal that typically moves from the neurons cell body down the axon to the axon terminals.

a. threshold of excitation
b. hyperpolarization
c. depolarization
d. action potential

Explanation:

An action potential is the electrical signal that travels from a neuron's cell - body down the axon to the axon terminals. Threshold of excitation is the level of stimulation needed to trigger an action potential. Hyperpolarization makes the inside of the neuron more negative and is not the signal itself. Depolarization is part of the process of generating an action potential but not the signal that travels down the axon.

Answer:

d. action potential