A subthreshold stimulus will not generate an action potential whereas a suprathreshold stimulus does generate an action potential. This is an example of
A) a refractory period.
B) electrotonic conduction.
C) the all -or -none principle.
D) positive feedback.
E) negative feedback.

Question

Quizplus · Accepted Answer

The all-or-none principle states that if a stimulus reaches the threshold, an action potential is fired at its full intensity; if the stimulus is below the threshold (subthreshold), no action potential is generated. This principle explains why a suprathreshold stimulus generates an action potential while a subthreshold stimulus does not.

A Subthreshold Stimulus Will Not Generate an Action Potential Whereas