Read the following hormone
A)Epinephrine B)Thyroid hormone
C)Nor-epinephrine D)Melatonin
Identify the hormones that considered as catecholamines

Options

A. A and B
B. A and C
C. B and C
D. C and D

Answer

To identify the hormones that are considered catecholamines from the given options, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Definition of Catecholamines**:
- Catecholamines are a class of organic compounds that include neurotransmitters. They are derived from the amino acid tyrosine and have a catechol group and an amine side chain.

2. **List the Given Hormones**:
- A) Epinephrine
- B) Thyroid hormone
- C) Nor-epinephrine
- D) Melatonin

3. **Identify Catecholamines**:
- The primary catecholamines are:
- **Epinephrine (Adrenaline)**: This hormone is produced in the adrenal medulla and is involved in the fight or flight response.
- **Nor-epinephrine (Norepinephrine)**: Also produced in the adrenal medulla, it plays a role in the fight or flight response as well.
- **Dopamine**: While not listed in the options, it is also a catecholamine.

4. **Evaluate Each Option**:
- A) **Epinephrine**: Yes, it is a catecholamine.
- B) **Thyroid hormone**: No, it is not a catecholamine; it is produced by the thyroid gland and regulates metabolism.
- C) **Nor-epinephrine**: Yes, it is a catecholamine.
- D) **Melatonin**: No, it is not a catecholamine; it is involved in regulating sleep-wake cycles.

5. **Conclusion**:
- The hormones that are considered catecholamines from the options provided are **A) Epinephrine** and **C) Nor-epinephrine**.

### Final Answer:
The hormones that are considered catecholamines are **A) Epinephrine** and **C) Nor-epinephrine**.

---