How many statements are correct regarding paraythyroid gland

Options

A. Four parathyroid gland present on front side of thyroid gland
B. It secretes parathromone which is steroidal in nature
C. It decrease blood of `Ca^(++)` level
D. It act on bone and stimulate bone resorbtion

Answer

To determine how many statements are correct regarding the parathyroid gland, let's analyze each statement one by one based on the information provided in the video transcript.

### Step-by-Step Solution:

1. **Statement 1**: "4 parathyroid glands are present on the front side of the thyroid gland."
- **Analysis**: This statement is incorrect. The parathyroid glands are actually located on the back side of the thyroid gland, not the front.

2. **Statement 2**: "They secrete parathyroid hormone which is steroidal in nature."
- **Analysis**: This statement is also incorrect. The parathyroid hormone (PTH) is a peptide hormone, not a steroid hormone.

3. **Statement 3**: "Parathyroid hormone decreases blood calcium levels."
- **Analysis**: This statement is incorrect. Parathyroid hormone actually increases blood calcium levels by promoting calcium reabsorption in the kidneys, increasing calcium absorption from food, and stimulating bone resorption.

4. **Statement 4**: "Parathyroid hormone increases blood calcium levels."
- **Analysis**: This statement is correct. PTH functions to increase calcium levels in the blood through various mechanisms, including renal reabsorption, dietary absorption, and bone demineralization.

### Conclusion:
Out of the four statements provided, only **one statement** (the fourth statement) is correct regarding the parathyroid gland.

### Final Answer:
**1 statement is correct regarding the parathyroid gland.**

---