Most active phagocytic white blood cells are

Options

A. Neutrophils and monocytes
B. Neutrophils and eosinophils
C. Lymphocytes and macrophages
D. Eosinophils and lymphocytes

Answer

**Step-by-Step Solution:**

1. **Understanding Phagocytosis**:
- Phagocytosis is a biological process where certain cells, known as phagocytes, engulf and digest foreign particles, such as bacteria and dead or dying cells. This is a crucial part of the immune response.

2. **Identifying Phagocytic Cells**:
- The primary types of phagocytic white blood cells include neutrophils, monocytes, macrophages, and to a lesser extent, eosinophils.

3. **Evaluating the Options**:
- Option A: Neutrophils and Monocytes
- Option B: Neutrophils and Eosinophils
- Option C: Lymphocytes and Macrophages
- Option D: Eosinophils and Lymphocytes

4. **Analyzing Neutrophils and Monocytes**:
- Neutrophils are the first responders to sites of infection and are highly effective at phagocytizing bacteria.
- Monocytes, which can differentiate into macrophages, also play a significant role in phagocytosis and can respond to infection sites.

5. **Comparing with Other Options**:
- Eosinophils are primarily involved in combating multicellular parasites and do have some phagocytic activity, but they are not as active as neutrophils and monocytes.
- Lymphocytes are primarily involved in the adaptive immune response and are not considered phagocytic cells.

6. **Conclusion**:
- Based on the analysis, the most active phagocytic white blood cells are indeed neutrophils and monocytes. Therefore, the correct answer is **Option A**.

**Final Answer**: The most active phagocytic white blood cells are Neutrophils and Monocytes (Option A).

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