Nissl's granules are irregular masses of ribosomes and RER and are characteristically found in

Options

A. nerve cells
B. mast cells
C. bone cells (osteocytes)
D. catilage cells (chondrocytes)

Answer

**Step-by-Step Solution:**

1. **Understanding Nissl's Granules**: Nissl's granules are irregular masses composed of ribosomes and rough endoplasmic reticulum (RER). They play a crucial role in protein synthesis within cells.

2. **Identifying the Cell Types**: The question provides four options: nerve cells, mast cells, bone cells, and cartilage cells. We need to determine which of these cell types characteristically contain Nissl's granules.

3. **Analyzing Each Cell Type**:
- **Nerve Cells**: These cells, also known as neurons, are known to have Nissl's granules. The granules are found in the cell body (soma) and are involved in synthesizing proteins necessary for the functioning of the neuron.
- **Mast Cells**: These cells contain granules filled with substances like histamine and heparin, but they do not contain Nissl's granules.
- **Bone Cells (Osteocytes)**: Bone cells are primarily involved in the storage of calcium and phosphate, and they do not have Nissl's granules.
- **Cartilage Cells (Chondrocytes)**: These cells help connect bones and do not contain Nissl's granules either.

4. **Conclusion**: After analyzing the options, it is clear that Nissl's granules are characteristically found in nerve cells.

5. **Final Answer**: Nissl's granules are characteristically found in **nerve cells**.

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