The term "twitch" refers to the mechanical response of a muscle fiber during one cross-bridge cycle.

Name: The term "twitch" refers to the mechanical response of a muscle fiber during one cross-bridge cycle.
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A twitch in muscle physiology refers to the brief contraction of all the muscle fibers in a motor unit in response to a single action potential. It is not limited to one cross-bridge cycle but involves many cycles of cross-bridge formation and release throughout the contraction period.

The Term "Twitch" Refers to the Mechanical Response of a Muscle