When a skeletal muscle cell contracts and the muscle shortens,
A) myosin heads generate a single power stroke.
B) the actin molecule swivels during the power stroke.
C) some myosin heads are forming crossbridges as others are releasing them.
D) the actin ATPase allows the actin molecule to swivel.
E) the position of an actin molecule relative to a myosin molecule does not change.
C) some myosin heads are forming crossbridges as others are releasing them.
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