STANDARD Zoology Role of Calcium MCQ Question
Calcium is important in skeletal muscle contraction because
Prevents the formation of bonds between the myosin cross bridges and the actin filament
Detaches the myosin head from the actin filament
Activates the myosin ATPase by binding to it
Binds to troponin to remove the masking of active sites on actin for myosin
Correct Answer
Detailed Explanation
During muscle contraction, sarcoplasmic reticulum releases calcium ions which bind to troponin thus causing tropomyosin to shift from the phase of actin filament to which myosin head need to bind to produce contraction.
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