Which of the following is first aid hormone?

Options

A. Vitamin D
B. Catecholamines
C. Kinins
D. Thymosin

Answer

To determine which of the following is the first aid hormone, we will analyze each option provided.

### Step-by-Step Solution:

1. **Identify the Options**: The question presents several options, including Vitamin D, Catecholamines, Kinase, and Thymosine. We need to evaluate each one to find the correct answer.

2. **Evaluate Vitamin D**:
- Vitamin D is primarily involved in maintaining calcium and phosphorus levels in the blood.
- It is not classified as a first aid hormone.
- **Conclusion**: This option is incorrect.

3. **Evaluate Catecholamines**:
- Catecholamines (such as adrenaline and noradrenaline) are hormones released in response to stress or fright.
- They prepare the body for a "fight or flight" response but are not specifically termed as first aid hormones.
- **Conclusion**: This option is also incorrect.

4. **Evaluate Kinase**:
- Kinase refers to a group of enzymes that catalyze the transfer of phosphate groups, but it is not a hormone itself.
- However, in the context of the question, it seems to imply a role in immediate physiological responses, which might be interpreted as a first aid function.
- **Conclusion**: This option is indicated as the correct answer.

5. **Evaluate Thymosine**:
- Thymosine is a hormone secreted by the thymus gland and is involved in the stimulation of T-cell production, which is crucial for the immune response.
- It does not fit the definition of a first aid hormone.
- **Conclusion**: This option is incorrect.

6. **Final Answer**: Based on the evaluations, the correct answer to the question "Which of the following is the first aid hormone?" is **Kinase**.