Sarcoplasmic reticulum is endoplasmic reticulum found in

Options

A. Adipose cell
B. Muscle cell
C. Nerve cell
D. Leucocyte

Explanation

**Step-by-Step Solution:**

1. **Understanding Sarcoplasmic Reticulum**: The sarcoplasmic reticulum is a specialized form of endoplasmic reticulum. It is specifically adapted for certain functions in muscle cells.

2. **Identifying the Cell Type**: The question asks where the sarcoplasmic reticulum is found. Among the options provided (adipose cell, muscle cell, nerve cell, or leucocyte), the sarcoplasmic reticulum is primarily found in muscle cells.

3. **Function of Sarcoplasmic Reticulum**: The main function of the sarcoplasmic reticulum is the storage of calcium ions. These calcium ions are crucial for muscle contraction, as they are released when a muscle cell is stimulated to contract.

4. **Conclusion**: Therefore, the sarcoplasmic reticulum is an endoplasmic reticulum that is specifically found in muscle cells.

**Final Answer**: Sarcoplasmic reticulum is endoplasmic reticulum found in muscle cells.

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