During an isometric twitch in a skeletal muscle:

Question

Quizplus · Accepted Answer

During an isometric twitch, the tension generated by the muscle remains constant while the sarcomeres do not significantly shorten. This is because the load on the muscle is equal to the tension generated, resulting in no overall movement or shortening of the whole muscle. Option A and E are both incorrect because the tension and load are equal in an isometric contraction. Option B is incorrect because tetanus is a sustained muscle contraction that can only occur if the muscle is stimulated at a high frequency, and is therefore not a characteristic of a single isometric twitch. Option D is incorrect because, as previously mentioned, there is no significant shortening of the whole muscle during an isometric twitch.

During an Isometric Twitch in a Skeletal Muscle