The Expression "All-Or-None" Means That

Question

The expression "all-or-none" means that .
A) the action potential in a neuron may be larger or smaller depending on the amount of stimulation (it is graded)
B) the compound action potential in a nerve is graded
C) the compound action potential in a nerve always has the same shape and size (amplitude)
D) the action potential in a neuron always has the same shape and size (amplitude)

Accepted Answer

The "all-or-none" principle refers to the fact that once a neuron's action potential is triggered, it always occurs with the same shape and size, regardless of the strength of the stimulus, as long as the threshold is reached.