describe the mechanism of contraction of skeletal muscle
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Explanation:
Muscle contraction occurs when the thin actin and thick myosin filaments slide past each other. ... In this conformation the cross-bridge binds weakly to actin and attaches and detaches so rapidly that it can slip from actin site to actin site, offering very little resistance to stretch.
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When an impulse reaches the muscle fibres of a motor unit, it stimulates a reaction in each sarcomere between the actin and myosin filaments. This reaction results in the start of a contraction and the sliding filament theory.
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