Memory cells are produced by

Options

A. T-lymphocytes
B. B-lymphocytes
C. Monocytes
D. Neutrophils

Answer

**Step-by-Step Solution:**

1. **Understanding Memory Cells**: Memory cells are a type of immune cell that "remembers" past infections. They play a crucial role in the adaptive immune response by providing long-term immunity.

2. **Identifying the Types of Lymphocytes**: The immune system consists of different types of lymphocytes, primarily T-lymphocytes and B-lymphocytes. Both types are involved in the immune response but have different functions.

3. **Role of T-Lymphocytes**: T-lymphocytes are responsible for cell-mediated immunity. They can differentiate into various types, including helper T-cells and cytotoxic T-cells. Importantly, some of these T-cells become memory T-cells after an initial infection.

4. **Role of B-Lymphocytes**: B-lymphocytes are responsible for humoral immunity. They produce antibodies against specific antigens. Some B-cells also become memory B-cells.

5. **Conclusion**: Since the question specifically asks about memory T-cells, the correct answer is that memory T-cells are produced by T-lymphocytes.

**Final Answer**: Memory cells are produced by T-lymphocytes.

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