Intakes of ORS inhibits the secretion of

Options

A. Vasopressin
B. Oxytocin
C. Melatonin
D. Thyroxine

Answer

### Step-by-Step Solution:

1. **Understanding the Question:**
The question asks which hormone's secretion is inhibited by the intake of Oral Rehydration Solution (ORS). The options provided are vasopressin, oxytocin, melatonin, and thyroxine.

2. **Identifying the Role of Vasopressin:**
Vasopressin, also known as antidiuretic hormone (ADH), is secreted by the posterior pituitary gland in response to increased osmolarity due to water loss from the body. Its primary function is to promote water reabsorption in the kidneys, thereby conserving water and concentrating urine.

3. **Understanding the Function of ORS:**
Oral Rehydration Solution (ORS) is designed to replenish lost fluids and essential salts in the body, especially after conditions like diarrhea or dehydration. When ORS is consumed, it effectively replaces the lost fluids and electrolytes.

4. **Connecting ORS Intake to Vasopressin Secretion:**
When ORS is taken, it mitigates the effects of dehydration by replacing lost fluids and salts. As a result, the body does not need to conserve water as urgently, leading to a decrease in the stimulus for vasopressin secretion.

5. **Conclusion:**
Since the intake of ORS fulfills the body's need for hydration and electrolyte balance, it inhibits the secretion of vasopressin. Therefore, the correct answer is **vasopressin**.

### Final Answer:
The intake of ORS inhibits the secretion of **vasopressin**.

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