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Only a portion of the duration of a single twitch includes increasing tension within a muscle...

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Biology

  1. Only a portion of the duration of a single twitch includesincreasing tension within a muscle fiber.
    1. What are the three main phases/periods of a musclecontraction?
    2. During which portion(s) (name the period) of a twitch istension NOT increasing. Clearly explain why ineach case.

c. What are all the steps involved in a single twitch thathappen during this period without tension?

Answer & Explanation Solved by verified expert
3.9 Ratings (467 Votes)
a What are the three main phasesperiods of a muscle contraction Ans Muscle Contraction has three phases 1 Latent period lag phase This starts at the point of stimulus includes action potential and release Ca2 ions Contraction is generated by a single action potential called a muscle twitch This period is a short delay of 12msec 2 Contraction phase Crossbridges between actin and myosin are formedMyosin releases and reforms crossbridges as the sarcomere shortens and muscle contracts    See Answer
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