Why are TCT and PTH called antagonist hormones?

Explanation

**Step-by-Step Solution:**

1. **Definition of Antagonist Hormones**: Antagonist hormones are hormones that have opposite effects on the same physiological function. In this case, TCT (Thyrocalcitonin) and PTH (Parathormone) are the two hormones in question.

2. **Understanding TCT (Thyrocalcitonin)**:
- **Full Form**: TCT stands for Thyrocalcitonin.
- **Nature**: It is a protein hormone.
- **Source**: TCT is secreted by the thyroid gland.
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