Complete each sentence. a. Cross-bridge binding triggers the release of ATP hydrolysis products from , and produces the which generates force.
b. Ca2+ binds to on the thin filaments, causing tropomyosin to move away from its blocking position, thereby uncovering cross-bridge binding sites on
c. Energized portions of myosin molecules called bind to actin.
d. binds to myosin, breaking the linkage between actin and myosin and thereby allowing the cross-bridges to from actin.