Question

question 21
2 points
a(n) ______ is the electrical signal that typically moves from the neurons cell body down the axon to the axon terminals.

• action potential
• depolarization
• threshold of excitation
• hyperpolarization

clear selection

Explanation:

• Action potential is the electrical impulse that travels from a neuron's cell body down the axon to axon terminals.
• Depolarization is a shift in membrane potential that precedes an action potential, not the full signal itself.
• Threshold of excitation is the membrane potential level needed to trigger an action potential, not the signal.
• Hyperpolarization is a shift in membrane potential that makes a neuron less likely to fire, unrelated to the forward-traveling electrical signal.

Answer:

A. action potential