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 and identify which characteristic cannot be attributed to it, we can follow these steps:

### Step-by-Step Solution:

1. **Identify Collip's Hormone**:
- Collip's hormone is also known as Parathyroid Hormone (PTH). It is secreted by the parathyroid glands and plays a crucial role in regulating calcium levels in the blood.

2. **Understand the Functions of Collip's Hormone**:
- The primary function of Collip's hormone is to increase blood calcium levels. It does this by promoting the release of calcium from bones, increasing intestinal absorption of calcium, and reducing calcium loss in urine.

3. **Evaluate the Given Characteristics**:
- **Cause bone demineralization**: This is true. Collip's hormone increases blood calcium levels by causing the release of calcium from bones, leading to bone demineralization.
- **Antagonistic to calcitonin**: This is also true. Calcitonin lowers blood calcium levels, while Collip's hormone raises them, making them antagonistic.
- **Hypocalcemic hormone**: This is false. Collip's hormone is a hypercalcemic hormone, meaning it increases blood calcium levels, not decreases them.
- **Peptide hormone**: This is true. Collip's hormone is indeed a peptide hormone, as it is composed of amino acids.

4. **Identify the Incorrect Characteristic**:
- Among the options provided, the characteristic that cannot be attributed to Collip's hormone is that it is a "hypocalcemic hormone." This is incorrect because Collip's hormone actually increases calcium levels in the blood.

### Conclusion:
The characteristic that cannot be attributed to Collip's hormone is that it is a hypocalcemic hormone.