what is sarcomere ??????
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A sarcomere is the basic contractile unit of muscle fiber. Each sarcomere is composed of two main protein filaments—actin and myosin—which are the active structures responsible for muscular contraction. The most popular model that describes muscular contraction is called the sliding filament theory.
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hiii
Explanation:
the portion of the myofibril between between two successive 'Z' lines is considered as the functional unit of contraction and is called of sarcomere.
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