Which of the following concepts does the all-or-none law describe?
A)All dendrites must be hyperpolarized before a neuron fires.
B)All neurons in a nerve fire or none of them fires.
C)The size of an action potential does not depend on the stimulus that started it.
D)The frequency at which a neuron fires is independent of the intensity of the stimulus.

Question

Quizplus · Accepted Answer

The all-or-none law describes the fact that once a neuron reaches its threshold for firing an action potential, it will either fire at its full strength or not fire at all, regardless of the intensity of the stimulus that caused it to fire. Therefore, the size of an action potential does not depend on the stimulus that started it. This concept does not refer to dendrites or the firing behavior of multiple neurons in a nerve.

Which of the Following Concepts Does the All-Or-None Law Describe