An oscilloscope can display "spikes" that correspond to nerve impulses in response to a certain stimulus intensity.If the stimulus intensity is decreased, you are likely to observe spikes that are
A) less frequent and smaller in size.
B) less frequent and of the same size.
C) as frequent and smaller in size.
D) the same signal as with the higher stimulus intensity.

Question

Quizplus · Accepted Answer

Nerve impulses, or action potentials, are all-or-nothing events, meaning their size (amplitude) remains constant regardless of stimulus intensity. However, the frequency of these impulses can decrease with a lower stimulus intensity.

An Oscilloscope Can Display "Spikes" That Correspond to Nerve Impulses