Which of the following is an amino acid derived hormone ?

Options

A. insulin
B. epinephrine
C. estradiol
D. testosterone

Answer

To determine which of the following is an amino acid derived hormone, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Types of Hormones**: Hormones can be classified based on their chemical structure into several categories:
- Amino acid derivatives (e.g., catecholamines)
- Peptide or polypeptide hormones (e.g., insulin)
- Steroidal hormones (e.g., testosterone, estradiol)

2. **Examine Each Option**: We need to analyze the given options to identify which one is an amino acid derivative hormone.
- **Insulin**: This is a peptide hormone secreted by the pancreas. It is not an amino acid derivative.
- **Epinephrine**: This hormone is secreted by the adrenal medulla and is derived from the amino acid tyrosine. It is classified as a catecholamine, making it an amino acid derivative.
- **Estradiol**: This is a steroid hormone produced by the ovaries. It is not an amino acid derivative.
- **Testosterone**: This is also a steroid hormone, produced by the testes, and is not an amino acid derivative.

3. **Identify the Correct Answer**: Based on the analysis, the only hormone that fits the criteria of being an amino acid derivative is epinephrine.

4. **Conclusion**: Therefore, the correct answer to the question is **epinephrine**.

### Final Answer:
Epinephrine is the amino acid derived hormone.

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