MCAT Question of the Day
    •

    Q:

    		 ATP hydrolysis in skeletal muscle fibers occurs:
    		 

    A

    		 as the myosin head dissociates from the actin filament.

    B

    		 as the myosin head changes conformation.

    C

    		 as troponin blocks myosin from binding on actin.

    D

    		 as calcium unbinds from troponin.



    Musculoskeletal System |
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