My best friend hasn't cam to school since last week and I try to call her but she nvermind picks up I come to her house she's not home where is she Im really worried and my teachers bday is soon and I don't know what to give her oh dear here comes my mum to take me shopping for my teachers present.
Erythropoiesis (from Greek 'erythro' meaning red and 'poiesis' meaning to make) is the process which produces red blood cells (erythrocytes). It is stimulated by decreased O 2 in circulation, which is detected by the kidneys, which then secrete the hormone erythropoietin.
This test measures the amount of erythropoietin in the blood. Erythropoietin is a hormone produced primarily by the kidneys. It is produced and released into the bloodstream in response to low blood oxygen levels (hypoxemia). Erythropoietin is carried to the bone marrow, where it works to stimulate precursor cells to become red blood cells (RBCs). RBCs contain hemoglobin, a protein that carries oxygen throughout the body.