<prompt> Erythropoietin isare produced by -Juxtaglomerular cellsInterstitial cells of the peritubular capillary bed of the kidneysPars recta of PCTMacula densa  <response>: Ans. B. Interstitial cells of the peritubular capillary bed of the kidneysErythropoietin is a glycoprotein hormone which stimulate erythrocyte production.In adults, about 85 of erythropoietin comes from the kidney interstitial cells in peritubular capillary bed and 15 from liver Perivenous hepatocytes. Small amount is also produced in brain; and uterus and oviduct. 