For this activity: The steps of muscle contraction listed below are in the wrong order! Please put them in the correct order. The myosin head moves back into position to restart the stroke Myosin heads pivot, and ADP + P are released from the myosin head Troponin is able to bind to tropomyosin Nervous system sends a signal for muscular contraction Calcium ions are released from the sarcoplasmic reticulum The action potential from the nervous system stops Calcium ions flood the muscle cell Calcium ions are able to bind to troponin Calcium is returned to the sarcoplasmic reticulum Tropomyosin shifts, revealing myosin binding sites on actin A new ATP binds to the myosin head, causing detachment of the myosin head from actin Myosin heads bind to actin ATP (on the myosin head) is hydrolyzed into ADP + P