Feedback regulation by red cell mass of the sensitivity of the erythropoietin-producing organ to hypoxia.
D000740:Anemia / Q000097:blood*; D000818:Animals; D004912:Erythrocytes; D004920:Erythropoiesis; D004921:Erythropoietin / Q000096:biosynthesis*; D005246:Feedback; D005260:Female; D006400:Hematocrit; D000860:Hypoxia / Q000097:blood*; D007503:Iron Isotopes; D008297:Male; D051379:Mice; D011086:Polycythemia / Q000097:blood*; D051381:Rats; D012156:Reticulocytes
D007503:Iron Isotopes; D004921:Erythropoietin