'Histamines'' the inflammation producing substances are produced by which cells of the body?

Options

A. Mast cells
B. Collagen fibres
C. Macrophages
D. Sustentacular cells

Answer

**Step-by-Step Solution:**

1. **Understanding Histamines**: Histamines are chemical substances in the body that play a crucial role in the inflammatory response. They are involved in various physiological functions, including the immune response.

2. **Identifying the Options**: The options provided are:
- Mast cells
- Collagen fibers
- Macrophages
- Sustentacular cells

3. **Analyzing Each Option**:
- **Collagen Fibers**: These are structural proteins that provide support and strength to tissues. They are not involved in the production of histamines.
- **Macrophages**: These are immune cells that perform phagocytosis, meaning they engulf and digest cellular debris and pathogens. They do not produce histamines.
- **Sustentacular Cells**: These cells provide structural support in various tissues but do not produce histamines.
- **Mast Cells**: These are a type of immune cell that is known for their role in allergic reactions and inflammation. They release histamines in response to allergens or injury.

4. **Conclusion**: Based on the analysis, the cells responsible for producing histamines are **mast cells**.

**Final Answer**: Mast cells

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