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the binding of calcium to troponin a) causes cross-bridges to detach b) changes the shape of the thick filament c) moves tropomyosin away from binding sites d) initiates an action potential across the sarcolemma e) produces energy for the power strok

Sagot :

Answer:

The correct answer is c) moves tropomyosin away from binding sites.

Explanation:

What happens when calcium binds to troponin?

Tropomyosin is eliminated from the binding sites when calcium binds to troponin, changing the structure of the protein. When a muscle cell is triggered, the sarcoplasmic reticulum releases the calcium ions it has been holding in reserve, which allows the cross-bridge muscle contraction cycle to occur.

When troponin is activated, Ca2+ binds to it and causes azimuthal migration of tropomyosin around the actin filament, revealing the myosin binding sites and allowing the actin-myosin interaction that drives contraction.

Therefore, the binding of calcium to troponin moves tropomyosin away from the binding sites.

To learn more about troponin from the given link

https://brainly.com/question/25492024

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