Kidneys do not help in

Options

A. (1) osmoregulation
B. (2) maintaninig body temperature
C. (3) maintaining composition of body plasma
D. (4) regulation of body pH

Answer

**Step-by-Step Solution:**

1. **Understanding Kidney Functions**: The kidneys are vital organs that perform several essential functions in the body. They are primarily involved in filtering blood, removing waste products, and regulating various bodily functions.

2. **Identifying the Functions of Kidneys**:
- **Osmoregulation**: The kidneys help maintain the balance of water and salts in the body, which is known as osmoregulation.
- **Maintaining Body Temperature**: This is not a function of the kidneys. Body temperature is primarily regulated by the hypothalamus in the brain.
- **Maintaining Composition of Body Plasma**: The kidneys regulate the composition of blood plasma by filtering out waste and reabsorbing necessary substances.
- **Regulation of Body pH**: The kidneys also play a role in maintaining the acid-base balance of the body by excreting hydrogen ions and reabsorbing bicarbonate from urine.

3. **Analyzing the Options**:
- Option 1: Osmoregulation - This is a function of the kidneys.
- Option 2: Maintaining body temperature - This is NOT a function of the kidneys.
- Option 3: Maintaining composition of body plasma - This is a function of the kidneys.
- Option 4: Regulation of body pH - This is a function of the kidneys.

4. **Conclusion**: Based on the analysis, the kidneys do not help in maintaining body temperature. Therefore, the correct answer is option 2.

**Final Answer**: The kidneys do not help in maintaining body temperature.

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