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Increase in the body fluid volume can...

Increase in the body fluid volume can

A

Switch on the osmoreceptiors

B

Switch off the osmoreceptors

C

Supress the ADH secretion `

D

Both (2) and (3)

Text Solution

AI Generated Solution

The correct Answer is:
**Step-by-Step Solution:** 1. **Understanding the Question**: The question asks what happens when there is an increase in the body fluid volume. This involves understanding the physiological responses to changes in body fluid levels. 2. **Identifying the Role of Osmoreceptors**: Osmoreceptors are specialized cells that detect changes in the osmotic pressure of body fluids. When body fluid volume increases, the osmotic pressure decreases. 3. **Evaluating the Options**: - **Option 1**: "Switch on the osmoreceptors" - This option is incorrect because an increase in body fluid volume would lead to a decrease in osmotic pressure, causing osmoreceptors to be less active or "switch off." - **Option 2**: "Switch off the osmoreceptors" - This option is correct. Increased body fluid volume leads to the inhibition of osmoreceptor activity. - **Option 3**: Discusses the release of ADH (Antidiuretic Hormone) from the neurohypophysis. When osmoreceptors are switched off, the release of ADH decreases, which affects water reabsorption in the kidneys. - **Option 4**: "2nd and 3rd" - This option includes both the correct statements regarding the switching off of osmoreceptors and the effects on ADH. 4. **Conclusion**: The correct answer is option 4, as it encompasses the correct responses to an increase in body fluid volume, including the switching off of osmoreceptors and the implications for ADH release. **Final Answer**: The correct option is 4 (2nd and 3rd). ---
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