During an isometric twitch in a skeletal muscle
A)tension generated by the muscle always exceeds the load on the muscle.
B)tetanus occurs.
C)sarcomeres do not significantly shorten.
D)the whole muscle shortens.
E)H zones shorten.

Question

Quizplus · Accepted Answer

During an isometric twitch, the tension generated by the muscle remains constant as the sarcomeres do not significantly shorten. Therefore, the load on the muscle may exceed the tension generated, and the muscle does not shorten as a whole, nor do the H zones shorten. Tetanus can only occur during sustained contractions, not during twitches.

During an Isometric Twitch in a Skeletal Muscle