Which of the following is steroid harmones

Options

A. Progesterone
B. Cholesterole
C. ACTH
D. Adrenaline

Answer

To determine which of the following substances are steroid hormones, we will analyze each option provided in the question.

### Step-by-Step Solution:

1. **Identify the Options**: The options given are progesterone, cholesterol, ACTH (adrenocorticotropic hormone), and adrenaline.

2. **Define Steroid Hormones**: Steroid hormones are a class of hormones that are derived from cholesterol. They are lipid-soluble and can easily pass through cell membranes to bind to receptors inside the cell.

3. **Analyze Each Option**:
- **Progesterone**: This is a steroid hormone that plays a crucial role in the menstrual cycle and in maintaining the early stages of pregnancy. **(Conclusion: Yes, it is a steroid hormone.)**

- **Cholesterol**: While cholesterol itself is not a hormone, it is a precursor to steroid hormones. It is the building block from which steroid hormones are synthesized. **(Conclusion: No, it is not a steroid hormone, but it is essential for the production of steroid hormones.)**

- **ACTH (Adrenocorticotropic Hormone)**: This hormone is produced by the pituitary gland and stimulates the adrenal glands to produce cortisol and other steroid hormones. However, ACTH itself is not a steroid hormone; it is a peptide hormone. **(Conclusion: No, it is not a steroid hormone.)**

- **Adrenaline (Epinephrine)**: This hormone is produced by the adrenal glands and is involved in the body's fight-or-flight response. It is classified as a catecholamine, which is a type of non-steroidal hormone. **(Conclusion: No, it is not a steroid hormone.)**

4. **Final Conclusion**: The only steroid hormone among the options provided is **progesterone**. Cholesterol is a precursor, while ACTH and adrenaline are not steroid hormones.

### Final Answer:
The steroid hormone from the options given is **progesterone**.