Memory cells are formed from

Options

A. Erythropoietic stem cells
B. Monocytes
C. T-lymphocytes
D. B-lymphocytes

Answer

**Step-by-Step Solution:**

1. **Understanding Memory Cells**: Memory cells are specialized cells that are part of the immune system. They are responsible for remembering past infections and providing a quicker response upon re-exposure to the same pathogen.

2. **Analyzing the Options**:
- **Option A: Ritropoietic Stem Cells**: These cells are involved in the production of blood cells through a process called erythropoiesis. They do not form memory cells.
- **Option B: Monocytes**: These are the largest type of white blood cells and play a role in the immune response, but they do not form memory cells.
- **Option C: T Lymphocytes**: These cells are crucial for the adaptive immune response and have the ability to recognize antigens. They can differentiate into memory T cells after an infection, which allows for a faster response to subsequent infections by the same pathogen.
- **Option D: B Lymphocytes**: These are also a type of white blood cell that plays a role in humoral immunity. They can also form memory B cells after an infection.

3. **Identifying the Correct Answer**:
- While both T lymphocytes and B lymphocytes can form memory cells, the question specifically asks about the formation of memory cells. T lymphocytes are particularly noted for their role in recognizing and responding to antigens, making them a key component in the formation of memory cells.

4. **Conclusion**: The correct answer is **C: T Lymphocytes**.