Sliding filament theory muscle contraction
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The document describes the sliding filament theory of muscle contraction. It explains the structure of skeletal muscle including the sarcolemma, myofibrils containing actin and myosin filaments, and sarcoplasmic reticulum. It then summarizes the sliding filament model where muscle shortening occurs through the movement of actin filaments over stationary myosin filaments, reducing the distance between Z-lines in the sarcomere.
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