Which one engulfs pathogens rapidly ?

Options

A. Acidophills
B. Monocytes
C. Basophils
D. Neutrophils

Explanation

To determine which cells can engulf pathogens rapidly, we will analyze the options provided in the question step by step.

### Step-by-Step Solution:

1. **Identify the Cell Types**: The question asks which type of cell can engulf pathogens rapidly. The options provided include acidophils, monocytes, basophils, and neutrophils.

2. **Evaluate Acidophils**:
- Acidophils are cells associated with the pituitary gland and are responsible for synthesizing growth hormone.
- They are not involved in phagocytosis (the process of engulfing pathogens).
- **Conclusion**: Acidophils are not the correct answer.

3. **Evaluate Monocytes**:
- Monocytes are a type of white blood cell (WBC) and are the largest among leukocytes.
- They have an amoeboid shape and a bean-shaped nucleus.
- Monocytes are motile and are known for their phagocytic abilities, meaning they can engulf pathogens rapidly.
- Upon entering tissue spaces, monocytes differentiate into macrophages, which are highly effective in engulfing bacteria and cellular debris.
- **Conclusion**: Monocytes are a strong candidate for the correct answer.

4. **Evaluate Basophils**:
- Basophils are another type of WBC with a three-lobed nucleus and coarse granules.
- They play a role in allergic and inflammatory responses by releasing chemicals like heparin and histamine.
- They are not primarily involved in phagocytosis.
- **Conclusion**: Basophils are not the correct answer.

5. **Evaluate Neutrophils**:
- Neutrophils are the most numerous type of WBC and have a multi-lobed nucleus.
- They are phagocytic and can engulf pathogens, but they are not as rapid in this process as monocytes.
- **Conclusion**: While neutrophils are phagocytic, they do not engulf pathogens as rapidly as monocytes.

6. **Final Conclusion**: Based on the evaluations, the cells that can engulf pathogens rapidly are **monocytes**.

### Answer:
**Monocytes** are the cells that engulf pathogens rapidly.

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