Hormone that decrease calcium lavel in blood :

Options

A. Thyroxine
B. Parathormone
C. Thyrocalcitonin
D. Cortisol

Answer

**Step-by-Step Solution:**

1. **Identify the Question:** The question asks for the hormone that decreases calcium levels in the blood.

2. **Review Hormones Related to Calcium Regulation:**
- **Thyroxine (T4):** Released from the thyroid gland, it primarily regulates the basal metabolic rate and red blood cell formation but does not decrease calcium levels.
- **Parathyroid Hormone (PTH):** Secreted by the parathyroid glands, it increases calcium levels in the blood, so it is not the correct answer.
- **Thyrocalcitonin (Calcitonin):** This hormone is released from the thyroid gland and is specifically responsible for decreasing calcium levels in the blood.
- **Cortisol:** Released from the adrenal glands, it primarily regulates glucose levels and does not affect calcium levels.

3. **Conclusion:** The hormone that decreases calcium levels in the blood is **Thyrocalcitonin (Calcitonin)**.

**Final Answer:** Thyrocalcitonin (Calcitonin)

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