Put the following in order from the first to the last step of skeletal muscle contraction. ATP binds to myosin ATP on mysoin is hydrolyzed to ADP plus Pi calcium binds to troponin motor neurons innervate the muscle cell the power stroke occurs tropomyosin is moved from the actin binding site
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Arrange the steps of muscle contraction in the correct order Myosin head forms cross bridge with actin microfilament (thin filament) ATP binds to myosin - myosin detaches from actin filament ATP hydrolysis causes conformation change of myosin to the high-energy "cocked" configuration Phosphate is relased from myosin head Myosin undergoes a conformational change; sliding the thin filament (Power Stroke) ADP is released from myosin head
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The following is a list of the events that occur during a muscle contraction. What is the correct sequence of these events? 1. Myosin cross-bridges bind to the actin. 2. The free myosin head splits ATP. 3. Calcium ion is released from the sarcoplasmic reticulum. 4. The myosin head pivots toward the center of the sarcomere. 5. Calcium ion binds to troponin. 6. The myosin head binds an ATP molecule and detaches from the actin.
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Put the following in the correct order for smooth muscle contraction. (All steps may not be needed) I. Ca2+ release by sarcoplasmic reticulum II. myosin phosphorylation III. Ca2+ binding to MLKC IV. Ca2+ binding to calmodulin V. calmodulin binding to MLKC VI. myosin binding to ATP VII. Ca2+ influx into the cell VII, IV, V, II VII, III, IV, V I, III, VI I, IV, V, VI VII, III, IV, V, II
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