AP Psychologyeasymcq1 pt
The action potential is described as all-or-none because
A.it fires fully or not at all once threshold is reached
B.it gets bigger with stronger stimuli
C.half-spikes are common
D.it requires no stimulation
Explanation
Core Concept
A subthreshold stimulus produces no spike; a suprathreshold one produces the same-size spike regardless of strength — intensity is coded by firing RATE, not spike size.
Correct Answer
Ait fires fully or not at all once threshold is reached
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