Which set of hormones is steroidal in nature?

Options

A. Cortisol and estradiol
B. Insulin and glucagon
C. Adrenaline and non-adrenaline
D. Thyroxine and calcitonin

Answer

To determine which set of hormones is steroidal in nature, we need to analyze the hormones listed in the question: cortisol, estradiol, insulin, glucagon, adrenaline, non-adrenaline, thyroxine, and calcitonin.

### Step-by-Step Solution:

1. **Identify the Hormones:**
- The hormones mentioned are:
- Cortisol
- Estradiol
- Insulin
- Glucagon
- Adrenaline
- Non-adrenaline
- Thyroxine
- Calcitonin

2. **Classify the Hormones:**
- **Steroidal Hormones:** These hormones are derived from cholesterol and include:
- Cortisol (produced by the adrenal cortex)
- Estradiol (a form of estrogen produced by the ovaries)
- Progesterone (not mentioned in the question but also a steroid hormone)
- Testosterone (also a steroid hormone, not listed in the question)
- **Non-Steroidal Hormones:**
- Insulin (a peptide hormone produced by the pancreas)
- Glucagon (also a peptide hormone produced by the pancreas)
- Adrenaline (an amino acid derivative produced by the adrenal medulla)
- Non-adrenaline (also an amino acid derivative)
- Thyroxine (produced by the thyroid gland, an iodinated amino acid derivative)
- Calcitonin (produced by the thyroid gland, a peptide hormone)

3. **Conclusion:**
- From the classification, the hormones that are steroidal in nature are:
- Cortisol
- Estradiol
- Therefore, the correct set of hormones that are steroidal in nature is **Cortisol and Estradiol**.

### Final Answer:
The set of hormones that is steroidal in nature includes **Cortisol and Estradiol**.