The contraction of the muscles. Caused by the sliding of the thin filament by myosin thick filament in the filed header comes the island with actin myosin header overhang resembles a bridge (cross-bridge), which pulls the actin acts into the center of the sarcomere, then head of the myosin cross-bridge, or it will fall off from its original Islands. To go to a new location on actin capture tension from contraction will be more or less depending on the number of cross-bridge that occurs. When the number of cross-bridge the most tension from contraction of muscles is as high as possible.
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