Excretion of dilute urine is due to

Options

A. More secretion of aldosterone
B. Less secretion of vasopressin
C. Less secretion of glucagon
D. More secretion of insulin

Answer

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks about the physiological mechanism that leads to the excretion of dilute urine.

2. **Identifying Key Hormones**: The key hormone involved in urine concentration is vasopressin, also known as antidiuretic hormone (ADH). This hormone is produced by the posterior pituitary gland.

3. **Role of Vasopressin**: Vasopressin promotes the reabsorption of water in the kidneys, specifically in the distal convoluted tubules and collecting ducts. When vasopressin levels are high, more water is reabsorbed, leading to concentrated urine.

4. **Effect of Low Vasopressin Levels**: If there is less secretion of vasopressin, less water is reabsorbed in the kidneys. This results in the production of dilute urine because more water remains in the urine rather than being reabsorbed back into the bloodstream.

5. **Evaluating the Options**:
- **More secretion of aldosterone**: Incorrect. Aldosterone primarily regulates sodium reabsorption, not water directly.
- **Less secretion of vasopressin**: Correct. This leads to dilute urine.
- **Less secretion of glucagon**: Incorrect. Glucagon is involved in glucose metabolism, not urine concentration.
- **More secretion of insulin**: Incorrect. Insulin also plays a role in glucose metabolism and does not directly affect urine concentration.

6. **Conclusion**: The correct answer is that the excretion of dilute urine is due to less secretion of vasopressin.

### Final Answer:
The excretion of dilute urine is due to **less secretion of vasopressin**.

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