During muscle contraction, energy is provided by :-

Options

A. Acetyl-Co.A
B. Phosphogen
C. AMP
D. Glucose

Answer

### Step-by-Step Solution:

1. **Understanding Muscle Contraction**: Muscle contraction requires energy to facilitate the movement of muscle fibers. This energy is crucial for the process to occur effectively.

2. **Identifying the Primary Energy Source**: The primary source of energy during muscle contraction is Adenosine Triphosphate (ATP). ATP is a high-energy molecule that stores and provides energy for various cellular processes, including muscle contraction.

3. **Recognizing the Limitation of ATP**: While ATP is essential, it is stored in limited quantities within muscle cells. Therefore, during prolonged or intense muscle activity, the supply of ATP can become depleted.

4. **Exploring Alternative Energy Sources**: To sustain muscle contraction when ATP levels are low, the body utilizes other high-energy molecules known as phosphogens. These phosphogens help in the resynthesis of ATP, ensuring that energy is continuously available for muscle contraction.

5. **Conclusion**: The correct answer to the question is that energy during muscle contraction is primarily provided by ATP, with phosphogens playing a crucial role in replenishing ATP levels during sustained activity.

### Final Answer:
During muscle contraction, energy is provided by Adenosine Triphosphate (ATP), and phosphogens are used to resynthesize ATP when needed.

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