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NEETZoologyExcretory Products and their Elimination

Which of the following physiological conditions acts as a direct stimulus for the activation of Juxtaglomerular (JG) cells to release renin?

Options

  1. AAn increase in body fluid volume
  2. BAn increase in blood pressure
  3. CA fall in glomerular filtration rate (GFR)
  4. DRelease of Atrial Natriuretic Factor (ANF)

Correct answer

C. A fall in glomerular filtration rate (GFR)

Step-by-step solution

According to NCERT, a fall in glomerular blood flow, glomerular blood pressure, or glomerular filtration rate (GFR) can activate the JG cells to release renin. An increase in body fluid volume switches off the osmoreceptors and suppresses ADH release. An increase in blood pressure stimulates the release of Atrial Natriuretic Factor (ANF), which acts as a check on the renin-angiotensin mechanism by causing vasodilation. Therefore, a fall in GFR is the correct stimulus for renin release. Answer: A fall in glomerular

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