Which of the following hormones is a derivative of fatty acids

Options

A. Gastrin
B. Thymosin
C. Estrogen
D. Prostaglandins.

Answer

To determine which hormone is a derivative of fatty acids, let's analyze the options provided:

1. **Gastrin**:
- Gastrin is a hormone that stimulates the secretion of gastric acid in the stomach. It is classified as a peptide hormone, which means it is derived from proteins. Therefore, gastrin is not a derivative of fatty acids.

2. **Thymosin**:
- Thymosin is a hormone produced by the thymus gland and plays a role in the immune system. Similar to gastrin, thymosin is also a peptide hormone, which means it is derived from amino acids (proteins). Thus, thymosin is not a derivative of fatty acids.

3. **Estrogen**:
- Estrogen is a group of hormones that play essential roles in the regulation of the reproductive system and secondary sexual characteristics. Estrogens are classified as steroid hormones, which are derived from cholesterol. Therefore, estrogen is not a derivative of fatty acids.

4. **Prostaglandins**:
- Prostaglandins are a group of bioactive lipids that are derived from fatty acids, specifically arachidonic acid. They have various functions in the body, including involvement in inflammation, pain, and the regulation of various physiological processes. Thus, prostaglandins are indeed derivatives of fatty acids.

After analyzing all the options, the correct answer is **prostaglandins**.

### Summary of Steps:
1. Analyze each hormone option provided.
2. Identify the type of each hormone (peptide, steroid, fatty acid derivative).
3. Conclude that prostaglandins are the only hormones derived from fatty acids.