Primary exposure to antigenic proteins of pathogen results in the production of all except

Options

A. B - cell - antibodies
B. T cell - antibodies
C. B memory cells
D. T memory cells

Answer

To solve the question "Primary exposure to antigenic proteins of pathogen results in the production of all except," we need to analyze the options provided and understand the immune response to primary exposure to antigens.

### Step-by-Step Solution:

1. **Understanding Primary Exposure**:
- When the immune system encounters a pathogen for the first time, it recognizes the antigenic proteins on the pathogen. This is known as primary exposure.

2. **Role of B Cells**:
- Upon primary exposure, B cells are activated. They differentiate into plasma cells that produce antibodies specific to the antigens encountered. This means that antibodies are produced in response to the antigen.

3. **Role of T Cells**:
- T cells, particularly helper T cells, play a crucial role in the immune response. However, they do not produce antibodies themselves. Instead, they help activate B cells and cytotoxic T cells.

4. **Memory Cells Formation**:
- During the primary immune response, memory B cells and memory T cells (both helper and cytotoxic) are formed. These cells remain in the body and provide a faster response upon subsequent exposures to the same antigen.

5. **Identifying the Correct Answer**:
- The question asks for the option that does not result from primary exposure to antigenic proteins. Since T cells do not produce antibodies, the correct answer is the option that mentions "T cell antibodies."

### Conclusion:
The correct answer is the option that states "T cell antibodies," as T cells do not produce antibodies during the primary immune response.