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How does myosin and actin depend upon Calcium ion (Ca+2) and ATP? Describe using at least...

How does myosin and actin depend upon Calcium ion (Ca+2) and ATP? Describe using at least 3 detailed, concrete sentences.

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Answer #1

1. Myosin head functions as an ATPase enzyme and it cleaves the ATP and use that energy for contraction process.

2. In the presence of large amount of calcoum ions , the inhibitory effect of troponin-tropomyosinon actin filaments is inhibited.

3. When calcium ions combine with troponin C, the troponin complex supposedly undergoes a conformational change, and this covers active sites of actinalong them to attract myosin crossbridge heads and cause contraction to proceed.

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