What is meant by the "all-or-none" principle?
A) When one neuron fires,all neurons fire.
B) Once an action potential is produced,its magnitude is always the same.
C) The stronger the depolarization,the stronger the action potential.
D) When one neuron is inhibited,all neurons are inhibited.

Question

Quizplus · Accepted Answer

The "all-or-none" principle refers to the fact that once a neuron reaches its threshold for firing an action potential, the magnitude of that action potential is always the same. If the threshold is not reached, no action potential will occur. This is a binary response, with no variability in magnitude based on the strength of the depolarization.

What Is Meant by the "All-Or-None" Principle