MUSCLE
SKELETAL MUSCLE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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What is required in order to allow the myosin head to bind to the actin binding site?
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glucose
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glycogen
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an exposed binding site on the actin
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the Na+/K+ pump
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Explanation:
Detailed explanation-1: -For myosin to bind actin, tropomyosin must rotate around the actin filaments to expose the myosin-binding sites.
Detailed explanation-2: -The first step in the process of contraction is for Ca++ to bind to troponin so that tropomyosin can slide away from the binding sites on the actin strands. This allows the myosin heads to bind to these exposed binding sites and form cross-bridges.
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