Question

multiple choice question
how does erythropoietin (epo) regulate red blood cell production?
by removing excess red blood cells that enter the kidney
through positive feedback
through negative feedback
by regulating the amount of hemoglobin produced

Explanation:

Erythropoietin (EPO) is a hormone produced mainly by the kidneys. When oxygen - carrying capacity is low (such as low red blood cell count), EPO is released. It stimulates the bone marrow to produce more red blood cells. As the red blood cell count increases and oxygen - carrying capacity improves, the production of EPO decreases. This is a negative feedback mechanism to maintain homeostasis.

Answer:

O through negative feedback