<prompt> Erythropoietin is secreted from:Juxtaglomerular cellsMacula densaInterstitial cellsGlomerulus  <response>: In adults, about 85 of the erythropoietin comes from the kidneys and 15 from the liver. Erythropoietin is produced by interstitial cells in the peritubular capillary bed of the kidneys and by perivenous hepatocytes in the liver. 