Question

Biochemical changes during muscle contraction

Answer 1

Answer:

Muscle contraction Biochemistry

Muscle contraction occurs when the thin actin and thick myosin filaments slide past each other. It is generally assumed that this process is driven by cross-bridges which extend from the myosin filaments and cyclically interact with the actin filaments as ATP is hydrolysed

Explanation:

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Answer 2

Explanation:

The following are the biochemical events in the mechanism of muscle contraction :

1. The active site on actin is exposed as Ca++ binds troponin. 

2. The myosin head forms a cross bridge with actin. 

3. During the power stroke, the myosin head bends and ADP and phosphate are released. 

4. A new molecule of ATP attaches to the myosin head, causing the cross bridge to detach. 

5. ATP hydrolyzes to ADP and phosphate which returns the myosin to the cocked position.