At the end of complete muscle contraction in sacromere
a) A-band become small .H - band becomes thin
b) A-bands become denser .H-band disapper
c) I- band becomes small .H-band becomes thin
d) I- band becomes big .H- band disappear
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When the actin is pulled approximately 10 nm toward the M-line, the sarcomere shortens and the muscle contracts. At the end of the power stroke, the myosin is in a low-energy position. ... ATP then binds to myosin, moving the myosin to its high-energy state, releasing the myosin head from the actin active site.
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