Nissl's granules are found in the cytoplasm of (A) eosinophils (B) striated muscles (C) neuron (D) osteocyte

Options

A. eosinophils
B. striated muscles
C. neuron
D. osteocyte

Answer

To solve the question regarding the location of Nissl's granules, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Nissl's Granules**:
- Nissl's granules are larger granular bodies found in the cytoplasm of certain cells. They are primarily associated with a specific type of cell in the body.

2. **Identifying the Function**:
- The main function of Nissl's granules is to facilitate protein synthesis within the cells. This is crucial for the functioning of the cells that contain them.

3. **Composition of Nissl's Granules**:
- Nissl's granules are composed of rough endoplasmic reticulum and clusters of free ribosomes. This composition is indicative of their role in synthesizing proteins.

4. **Historical Context**:
- The name "Nissl's granules" comes from the scientist Franz Nissl, who developed a staining technique (Nissl staining) that allows these granules to be visualized under a microscope.

5. **Analyzing the Options**:
- Now, let's evaluate the options given in the question:
- (A) Eosinophils: These are a type of white blood cell and do not contain Nissl's granules.
- (B) Striated muscles: These are muscle cells and also do not contain Nissl's granules.
- (C) Neuron: This is the correct answer, as Nissl's granules are specifically found in the cytoplasm of neurons.
- (D) Osteocyte: These are bone cells and do not have Nissl's granules.

6. **Conclusion**:
- Based on the analysis, the correct answer is (C) neuron.

### Final Answer:
(C) neuron