Parathormone induces

Options

A. Increase in blood sugar
B. Increase in serum calcium
C. Decrease in serum calcium
D. Decrease in blood sugar level.

Answer

**Step-by-Step Solution:**

1. **Understanding Parathormone (PTH):**
Parathormone, also known as parathyroid hormone, is a hormone secreted by the parathyroid glands. Its primary role is to regulate calcium levels in the blood.

2. **Function of Parathormone:**
The main function of parathormone is to increase the concentration of calcium in the blood. It does this by acting on various organs, including bones, kidneys, and the intestines.

3. **Effect on Bones:**
When parathormone is released, it stimulates the bones to release calcium into the bloodstream. This process involves the activation of osteoclasts, which are cells that break down bone tissue and release calcium.

4. **Effect on Kidneys:**
Parathormone also acts on the kidneys to reduce the amount of calcium excreted in urine, thus conserving calcium in the body.

5. **Effect on Intestines:**
Additionally, it enhances the absorption of calcium from the diet in the intestines, although this effect is more indirect and relies on the presence of vitamin D.

6. **Conclusion:**
Given these actions, the overall effect of parathormone is to **increase serum calcium levels** in the blood. Therefore, the correct answer to the question is **increase in serum calcium**.

**Final Answer:** Increase in serum calcium.

---