Erythropoietin is secreted by:: (A) Coical interstitial cells, (B) Cells in macula densa, (C) Granular cells, (D) Mesangial cells
Answer is A. JG apparatus Cells in macula densa Granular cells/ JG cells Mesangial cells Senses Na+ & Cl- in tubular fluids & initiate tubuloglomerular feedback. Synthesis & secrete renin Cells that can alternate the vessel diameter. Type I Coical interstitial cells : synthesize erythropoietin