NEET2026BiologyChapterActual
The juxtaglomerular (JG) cells of the kidney are activated to release renin in response to:
Options
- Aan increase in the glomerular filtration rate
- Ba fall in the glomerular blood pressure
- Can increase in the overall body fluid volume
- Dthe secretion of atrial natriuretic factor (ANF)
Correct answer
B. a fall in the glomerular blood pressure
Step-by-step solution
The juxtaglomerular (JG) cells are specialized cells located in the afferent arteriole of the kidney. A fall in glomerular blood flow, glomerular blood pressure, or glomerular filtration rate (GFR) activates the JG cells to release the enzyme renin into the blood. Renin initiates the Renin-Angiotensin-Aldosterone System (RAAS) by converting angiotensinogen to angiotensin I, which ultimately helps in increasing the blood pressure and GFR back to normal. An increase in GFR, body fluid volume, or the secretion of ANF