Cells responsible for cell-mediated response are:

Options

A. T-cytotoxic cells
B. T-Helper cells
C. B-Cell
D. Both (1) & (2)

Answer

**Step-by-Step Solution:**

1. **Understanding Immune Responses**: The immune response can be categorized into two main types: humoral (antibody-mediated) and cell-mediated responses.

2. **Humoral Response**: In the humoral response, B cells are responsible for producing antibodies. When B cells encounter an antigen (a foreign substance), they differentiate into plasma cells, which then secrete antibodies to neutralize the pathogen.

3. **Cell-Mediated Response**: In contrast, the cell-mediated immune response involves T lymphocytes (T cells). These cells directly act on infected cells or pathogens without the involvement of antibodies.

4. **Types of T Cells**:
- **T-Helper Cells**: These cells assist other immune cells by signaling B cells to produce antibodies.
- **T-Cytotoxic Cells**: These cells directly kill infected or cancerous cells.
- **T-Suppressor Cells**: These cells help regulate the immune response and prevent overactivity.

5. **Identifying the Correct Cells**: The question asks for the cells responsible for the cell-mediated immune response. The key players in this response are the T cells, specifically T-cytotoxic cells and T-helper cells.

6. **Conclusion**: Therefore, the answer to the question is that the cells responsible for cell-mediated response are T-cytotoxic cells and T-helper cells.

**Final Answer**: T-cytotoxic cells and T-helper cells are responsible for the cell-mediated immune response.

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