Which of the following characteristcs cannot be attributed to Collip's hormone?

Options

A. Causes bone demineralisation
B. Antagonistic to calcitonin
C. Hypocalcemic hormone
D. It is a peptide hormone

Answer

To solve the question regarding Collip's hormone (also known as parathormone), we need to analyze the characteristics provided in the options and determine which one cannot be attributed to this hormone.

### Step-by-Step Solution:

1. **Identify Collip's Hormone**:
- Collip's hormone is another name for parathormone, which is secreted by the parathyroid glands.

2. **Understand the Functions of Parathormone**:
- Parathormone is primarily known as a hypercalcemic hormone, meaning it increases the concentration of calcium in the blood.

3. **Evaluate Each Option**:
- **Option 1: Causes bone demineralization**:
- This is true. Parathormone activates osteoclasts, which leads to bone demineralization and the release of calcium into the bloodstream.
- **Option 2: Antagonistic to calcitonin**:
- This is also true. Calcitonin, secreted by the thyroid gland, lowers blood calcium levels, while parathormone raises them, making them antagonistic to each other.
- **Option 3: Hypocalcific hormone**:
- This is false. Parathormone is not a hypocalcific hormone; it is a hypercalcemic hormone, as it increases blood calcium levels.
- **Option 4: It is a peptide hormone**:
- This is true. Parathormone is classified as a peptide hormone.

4. **Conclusion**:
- The characteristic that cannot be attributed to Collip's hormone is that it is a "hypocalcific hormone." Therefore, the correct answer is this option.

### Final Answer:
The characteristic that cannot be attributed to Collip's hormone is: **It is a hypocalcific hormone.**

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