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Which of the Following Most Accurately Describes the Effect of Decreasing

Question 66

Multiple Choice

Which of the following most accurately describes the effect of decreasing Ca2+ concentration on sarcomere activity?


A) troponin is deactivated and tropomyosin covers the actin binding site
B) tropomyosin is deactivated and troponin covers the actin binding site
C) myosin no longer hydrolyzes ATP and detaches from actin
D) myosin no longer binds ATP and recocks into an upright position

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