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I know that it is the binding and tilting of myosins on actins that cause the sarcomere to be shortened. But I am a little bit confused about the details. The structure of a sarcomere is made of alternative bands of actin and myosin filaments. So when the actin is pulled shortened by the myosin filaments on both sides of it, wouldn't it experience forces in different directions? If so, why can the sarcomere be shortened rather than being torn up? I am a little confused about how exactly the movement of myosins cause the muscle to contract.

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  • $\begingroup$ Try youtubing the Sliding Filament Model of Muscle Contraction, there are many useful animations and explanations. $\endgroup$ – electronpusher Oct 13 '20 at 23:07

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