The permeability of the distal tubule and collecting duct to water is under the control of a hormone called :

Options

A. rennin
B. glucose
C. vasopressin
D. aldosterone

Explanation

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks about the hormone that controls the permeability of the distal tubule and collecting duct to water.

2. **Identifying the Options**: The options provided are renin, glucose, vasopressin, and aldosterone.

3. **Analyzing Each Option**:
- **Renin**: This is an enzyme that helps regulate blood pressure but does not directly affect water permeability in the distal tubule or collecting duct.
- **Glucose**: This is a simple sugar that is utilized by the body for energy and does not function as a hormone that regulates water permeability.
- **Vasopressin**: Also known as Antidiuretic Hormone (ADH), this hormone is released when there is an increase in blood osmolarity. It acts on the kidneys to increase water reabsorption in the distal tubule and collecting duct.
- **Aldosterone**: This hormone primarily regulates sodium and potassium levels, and while it does influence water retention indirectly, it is not the primary hormone responsible for water permeability.

4. **Conclusion**: Based on the analysis, the hormone that controls the permeability of the distal tubule and collecting duct to water is **vasopressin** (ADH).

5. **Final Answer**: The correct answer is **vasopressin**.

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