Anti diuretic hormone secretion increase when the hypothalamus is stimulated by:

Options

A. (1) Angiotensin receptors
B. (2) Glucose receptors
C. (3) Osmoreceptors
D. (4) Renin receptors

Answer

To determine which receptor stimulates the secretion of antidiuretic hormone (ADH) from the hypothalamus, we can analyze the options provided in the question.

### Step-by-Step Solution:

1. **Understanding Antidiuretic Hormone (ADH)**:
- ADH, also known as vasopressin, is a hormone that helps regulate water balance in the body. It is synthesized in the hypothalamus and secreted by the posterior pituitary gland.

2. **Function of ADH**:
- The primary role of ADH is to conserve body water by reducing urine output. It does this by making the kidneys reabsorb more water, leading to concentrated urine.

3. **Stimuli for ADH Secretion**:
- The secretion of ADH is triggered by various stimuli, particularly when there is a deficiency of body fluids or an increase in blood osmolarity.

4. **Identifying the Receptors**:
- The question lists four types of receptors:
- **Angiotensin receptor**: Involved in regulating blood pressure and aldosterone secretion.
- **Glucose receptor**: Primarily involved in insulin secretion.
- **Osmoreceptor**: Detects changes in osmolarity and is crucial for regulating water balance.
- **Renin receptor**: Also involved in the regulation of aldosterone secretion.

5. **Correct Answer**:
- The correct receptor that stimulates the hypothalamus to increase ADH secretion is the **osmoreceptor**. These receptors detect changes in the osmolarity of the blood and signal the hypothalamus to release ADH when dehydration occurs.

### Conclusion:
- Therefore, the answer to the question is **osmoreceptor**.