Hormones may be

Options

A. amino acid derivatives
B. Peptides
C. Steriods
D. All of the above

Answer

**Step-by-Step Solution:**

1. **Understanding Hormones:** Hormones are chemical messengers produced by glands in the endocrine system. They play a crucial role in regulating various physiological processes in the body.

2. **Types of Hormones:** Hormones can be classified into different categories based on their chemical structure. The main types include:
- Amino Acid Derivatives
- Peptides
- Steroids

3. **Amino Acid Derivatives:**
- These hormones are derived from amino acids.
- Example: Epinephrine (also known as adrenaline) is an amino acid derivative hormone that is involved in the body's stress response.

4. **Peptide Hormones:**
- Peptide hormones are composed of chains of amino acids.
- Example: Insulin is a peptide hormone that regulates glucose levels in the blood.

5. **Steroid Hormones:**
- Steroid hormones are derived from cholesterol and are lipid-soluble.
- Example: Sex hormones such as testosterone and estrogen are steroid hormones that play key roles in sexual development and reproduction.

6. **Conclusion:** Since hormones can be classified into all three categories mentioned above (Amino Acid Derivatives, Peptides, and Steroids), the correct answer to the question is "All of the above."

**Final Answer:** Option D: All of the above.

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