Threshold stimulus is the
A)maximum stimulus required to release acetylcholine.
B)minimum stimulus required to produce ATP.
C)maximum stimulus required to contract a muscle.
D)minimum strength of stimulation required to contract a muscle fiber.

Question

Quizplus · Accepted Answer

Threshold stimulus refers to the minimum strength of stimulation required to contract a muscle fiber. Once this threshold is exceeded, the muscle fiber will initiate a contraction, and as the strength of the stimulus increases, the force of the contraction will also increase, up to a certain point called the maximal stimulus. Therefore, choices A, B, and C are incorrect as they do not correctly describe threshold stimulus.

Threshold Stimulus Is the