Muscle tone is the condition in which
A) different muscles are taking responsibility for maintaining posture.
B) the muscle has generated maximum tension.
C) the muscle will eventually exhaust its supply of ATP.
D) a small but changing number of motor units is active.
E) the maximum number of action potentials is being received by the muscle.

Question

Quizplus · Accepted Answer

Muscle tone refers to the continuous state of readiness of a muscle that allows it to respond quickly when called upon. This is achieved by the activation of a small number of motor units in a muscle at any given time. These motor units are activated by the nervous system in a rotating manner, ensuring that the muscle stays in a state of readiness without getting fatigued. Therefore, option D is the correct choice, as it describes the continuous activation of a small but changing number of motor units in a muscle to maintain muscle tone.

Muscle Tone Is the Condition in Which