Glycogen is stored in

Options

A. (a) Liver and muscles
B. (b) Liver only
C. (c) Muscles only
D. (d) Pancreas

Answer

**Step-by-Step Solution:**

1. **Understanding Glycogen**: Glycogen is a polysaccharide that serves as a form of energy storage in animals. It is made up of glucose units and acts as a reservoir of energy.

2. **Storage Locations**: The primary organs that synthesize and store glycogen are the liver and skeletal muscles.

3. **Liver Function**: The liver cells store a significant amount of glycogen and have the ability to release it directly into the bloodstream when the body requires energy.

4. **Muscle Function**: Skeletal muscle cells also store glycogen, but they do not release it into the bloodstream. Instead, they use it for their own energy needs, especially during periods of exertion. If the muscles are fatigued, they can convert glycogen into lactic acid.

5. **Evaluating Options**:
- Option A states "liver and muscles" which is correct as both organs store glycogen.
- Option B states "liver only" which is incorrect.
- Option C states "muscles only" which is also incorrect.
- Option D states "pancreas" which is incorrect because the pancreas is involved in insulin secretion and glucose regulation, not glycogen storage.

6. **Conclusion**: The correct answer is Option A, which indicates that glycogen is stored in both the liver and skeletal muscles.

**Final Answer**: Glycogen is stored in the liver and skeletal muscles (Option A).

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