Which of the following actions does the body take when it detects a drop in oxygen levels in the blood?
*The liver and kidneys release the hormone erythropoietin, which triggers the mechanism of erythropoiesis, or the production of more
red blood cells.
*The liver and kidneys release the hormone erythropoietin, which triggers the mechanism of erythropoiesis, or the production of more
white blood cells.
*T-cells send chemical messages to the body to produce substances that will kill pathogens or they kill pathogens directly.
Red and white blood cells move around in plasma, targeting or destroying enemies and releasing chemicals