NEETZoologyExcretory Products and their Elimination
Which of the following physiological conditions switches off the osmoreceptors and suppresses the release of Antidiuretic Hormone (ADH)?
Options
- AIncrease in body fluid volume
- BExcessive loss of fluid from the body
- CA fall in glomerular filtration rate (GFR)
- DA decrease in blood volume
Correct answer
A. Increase in body fluid volume
Step-by-step solution
According to NCERT, an increase in body fluid volume switches off the osmoreceptors and suppresses the release of ADH to complete the feedback loop, thereby promoting diuresis. Excessive loss of fluid from the body activates osmoreceptors, stimulating the hypothalamus to release ADH. A fall in GFR or a decrease in blood volume activates the JG cells to release renin (initiating the RAAS pathway) and also stimulates ADH release to conserve water and restore blood pressure. Answer: Increase in body fluid volume