Rank the following in order for cross bridge events Powerstroke ATP binds to myosin head ADP and Pi released Hydrolysis of ATP Movement of myosin head into constrained position Myosin head attaches to actin binding sites Submit
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Put the events of the cross bridge-cycle in order, beginning with the figure at the top and moving clockwise. ATP is hydrolyzed and phosphate binds to myosin, causing cross bridge to return to its original orientation. Cross bridge binds to actin. A new ATP binds to myosin head, allowing it to release from actin. Pi is released from myosin head, causing conformational change in myosin. Power stroke causes filaments to slide; ADP is released. Resting fiber; cross bridge is not attached to actin.
Adi S.
What is the correct order of events in the sliding filament theory of muscle contraction? 1. Myosin head binds to actin 2. Calcium ions bind to troponin 3. Myosin cross-bridges bend, pulling actin toward center of sarcomere 4. ATP is split into ADP and P 5. Tropomyosin moves to expose active sites of actin 6. Sarcoplasmic reticulum releases calcium ions 7. ADP and P released from myosin
Emily H.
In the Sliding Filament Model of Contraction, cross-bridge detachment occurs when: A. ATP is hydrolyzed into ADP and Pi B. ATP is formed C. ATP is released D. a new ATP binds to the myosin, causing a conformational change in the myosin that allows it to detach E. the myosin head releases ADP and Pi, causing a conformational change in the myosin
Saleem J.
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