Tears from eyes and interferons are included under which of the following barriers ?

Options

A. Physiological and physical
B. Physical and cytokine
C. Physiological and cytokine
D. Cellular and cytokine

Answer

To determine the classification of tears from the eyes and interferons in the context of the body's barriers against pathogens, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Types of Barriers**:
- The human body has various barriers that protect against pathogens. These barriers can be categorized into:
- **Physical Barriers**: Such as skin.
- **Physiological Barriers**: Such as tears and saliva.
- **Cellular Barriers**: Such as T cells and B cells.
- **Cytokine Barriers**: Such as interferons.

2. **Identifying Tears**:
- Tears are a part of the body's physiological barriers. They help to wash away pathogens and contain enzymes that can break down bacteria.

3. **Identifying Interferons**:
- Interferons are proteins that play a crucial role in the immune response. They are classified as cytokines, which are signaling molecules that help to regulate the immune response and interfere with viral replication.

4. **Combining the Classifications**:
- Since tears are classified under physiological barriers and interferons under cytokine barriers, we can summarize that:
- **Tears**: Physiological Barrier
- **Interferons**: Cytokine Barrier

5. **Selecting the Correct Option**:
- Based on the classifications, the correct answer to the question is that tears and interferons are included under the categories of physiological and cytokine barriers, respectively.

### Final Answer:
- **Tears from the eyes and interferons are included under the physiological and cytokine barriers.**