● note: at the start of contraction ca+ binds to troponin which cause tropomyosin to move. This this binding sites on action are accessible.

➔ When a bound ATP on the myosin head is ​hydrolyzed to ADP and ino​rganic phosphate, the ​myosin head extends to attach​ to binding site on actin forming cross bridge

➔ Triggers power stroke

➔ A​ctin pulled towards M line

➔ Atp and pi released during power... more

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Sadaf Syeda
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1 students helped

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a month ago


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