Wwhen there is a formation of a myosin and actin cross bridge, due to the myosin head group, binding to Actin
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Myosin binds to actin, forming a cross bridge. What happens next? (a) acetylcholine is released (b) calcium ions stimulate exposure of active sites (c) myosin filaments move past one another, and the muscle fiber shortens (d) myosin is activated (e) $mathrm{P}_{i}$ is released, and the cross bridge flexes
Adi S.
Myosin binds to actin, forming a cross bridge. What happens next? (a) acetylcholine is released (b) calcium ions stimulate exposure of active sites (c) filaments slide past one another, and the muscle fiber shortens (d) myosin is activated (e) $P_{i}$ is released, and the cross bridge flexes.
Sri K.
Event: The myosin head binds to the actin filament, using the energy from hydrolyzing its bound molecule of ATP. The myosin head binds ATP and releases itself from the actin filament. Ca2+ induces conformational change in troponin. The sarcoplasmic reticulum releases Ca2+ into the cytosol. The myosin head produces a power stroke by releasing ADP and Pi.
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