Question: During normal muscle contraction (with ATP and Ca²? present), what happens immediately after the release of inorganic phosphate? Need Assignment Help?
a) The myosin head pivots and pulls the actin filament b) Calcium is released from the sarcoplasmic reticulum c) Myosin dissociates from actin and hydrolyzes ATP to ADP + Pi d) Tropomyosin shifts to expose more binding sites on actin