which of the following statement is correct with respect to kidney function regulation?

Options

A. a) When someone drinks lot of water, ADH release is suppressed.
B. b) Exposure to cold temperature stimulates ADH Release
C. c) An increase in glomerular blood flow stimulates formation of angiotensin II.
D. d) During summer, when body loses lot of water by evaporation, the release of ADH is suppressed.

Explanation

To determine which statement is correct regarding kidney function regulation, we can analyze each option provided in the question step by step.

### Step-by-Step Solution:

1. **Understanding ADH (Antidiuretic Hormone)**:
- ADH is a hormone that helps regulate water balance in the body by preventing excessive loss of water through urine (diuresis).
- It is secreted by the posterior pituitary gland in response to the body's hydration status.

2. **Analyzing Option A**:
- **Statement**: When someone drinks a lot of water, ADH release is suppressed.
- **Explanation**: When a person consumes a large amount of water, the volume of body fluids increases. This increase leads to a dilution of solutes in the blood, which is detected by osmoreceptors.
- **Conclusion**: The osmoreceptors signal the body that there is no need for ADH, leading to its suppression. Thus, this statement is **correct**.

3. **Analyzing Option B**:
- **Statement**: Exposure to cold temperature stimulates ADH release.
- **Explanation**: Cold temperatures do not directly stimulate ADH release; rather, ADH is released primarily in response to dehydration or high plasma osmolality.
- **Conclusion**: This statement is **incorrect**.

4. **Analyzing Option C**:
- **Statement**: Increase in glomerular blood flow stimulates the formation of angiotensin.
- **Explanation**: Angiotensin is primarily formed when there is low blood flow or low blood pressure in the kidneys, not when blood flow increases.
- **Conclusion**: This statement is **incorrect**.

5. **Analyzing Option D**:
- **Statement**: During summer, when the body loses a lot of water by evaporation, the release of ADH is suppressed.
- **Explanation**: In fact, during times of water loss (such as sweating in summer), the body increases ADH release to conserve water.
- **Conclusion**: This statement is **incorrect**.

### Final Conclusion:
The correct statement regarding kidney function regulation is **Option A**: When someone drinks a lot of water, ADH release is suppressed.

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