Which of the following does not play any role in calcium balnce in the human body?

Options

A. Vitamin-D
B. Parathyroid hormone
C. Thyrocalcitonin
D. Thymosin

Explanation

To determine which of the following options does not play a role in calcium balance in the human body, we need to analyze each option provided:

1. **Vitamin D**: This vitamin is crucial for calcium absorption in the intestines and helps maintain adequate serum calcium levels. It plays a significant role in calcium balance.

2. **Parathyroid hormone (PTH)**: This hormone is secreted by the parathyroid glands and is essential for regulating calcium levels in the blood. It increases blood calcium levels by stimulating the release of calcium from bones, increasing calcium reabsorption in the kidneys, and promoting the activation of vitamin D.

3. **Thyrocalcitonin (Calcitonin)**: This hormone is produced by the thyroid gland and helps lower blood calcium levels by inhibiting bone resorption and promoting calcium excretion in the kidneys. It plays a role in calcium homeostasis.

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