A Cross Bridge Forms When Which of the Following Occurs
A the binding of actin to the H line b a cocked head of myosin bound to actin c the linkage between two sarcomeres at the Z. ATP combines with myosin head and is hydrolized to. Image Result For Sliding Filament Mechanism Anatomy And Physiology Nursing Notes Physiology That is the myosin head spans the distance between the actin and myosin molecules. . As long as Ca ions remain in the sarcoplasm to bind to troponin and as long as ATP is available the muscle fiber will continue to shorten. A Total force is equal to the sum of active and passive force. P i is then released allowing myosin to expend the stored energy as a conformational change. Contraction of a Muscle Fiber A cross-bridge forms between actin and the myosin heads triggering contraction. Actin binds to myosin pulling myosin heads closer to the M line of the sarcomere The troponin-tropomyosin complex blocks the active sites on actin. Cross-bridge formation occurs...