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    Muscle contraction: Motor Multiple Unit Summation

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    Explain how a slight (but smooth) contraction differs from a vigorous contraction of the same muscle; use the concepts of multiple motor unit summation.

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    Adjusting Tension in Whole Muscles

    A twitch contraction is the simplest of all muscle contractions. It is a brief contraction of all the muscle fibers in a motor unit of a muscle in response to a single action potential in its motor neuron. But most muscle movements in the body are not twitches. Therefore, the amount of tension or force that a skeletal muscle can develop must vary. It depends on the frequency of stimulation of the muscle fibers, the length of ...

    Solution Summary

    Muscle contraction in light of motor multiple unit summation is discussed in this solution.