A reduced blood flow to the kidneys
increased demand for oxygen
Erythropoiesis may increase in response to low oxygen levels in the blood, a condition known as hypoxia, which can occur due to high altitude, chronic lung disease, or anemia. The kidneys detect decreased oxygen and release more erythropoietin, a hormone that stimulates the production of red blood cells in the bone marrow. Additionally, increased physical activity or conditions that elevate the demand for oxygen can also trigger enhanced erythropoiesis.
The factor that would lead to an increase in the momentum of a photon is an increase in its frequency.
Kidneys
The exact word for this would be ''erythropoiesis''.
Erythropoietin (EPO) primarily targets the bone marrow to increase erythropoiesis, which is the production of red blood cells. It stimulates the differentiation of progenitor cells into erythrocytes and promotes their maturation. EPO is produced mainly by the kidneys in response to low oxygen levels in the blood.
Erythropoiesis, or the production of red blood cells, is triggered by hypoxia or low oxygen levels in the body. This stimulates the release of erythropoietin, a hormone produced by the kidneys, which acts on the bone marrow to increase the production of red blood cells in order to help transport more oxygen to body tissues.
Erythropoiesis requires B12, Folic acid and iron.
During anemia decrease in oxygen tension causes the release of erythropoeitin which in turn causes hyperplasia of erythroid precursor cells thus causing an increase in the production of RBC's. This marrow response is called is effective erythropoiesis.
Hemorrhage or living at high altitude
Yes - an increase in contractility would lead to an increase in stroke volume. An increased stroke volume would cause an increased cardiac output.
No