The consumption of oxygen by the kidney

a. Decreases as blood flow increases
b. Is regulated by erythropoietin
c. Remains constant as blood flow increases
d. Directly reflects the level of sodium transport
e. Is greatest in the medulla

Option B.

Is regulated by erythropoiten.

Explanation:

Erythropoietin is an hormone produced by the kidney in order to promote the formation of red blood cells by the bone marrow. Since the red blood cells carries oxygen to parts of the body, this help in oxygen consumption of the kidney. Oxygen consumption by the kidney is regulated by erythropoietin

answer; polycythemia is the correct answer;

colors do exist. the color of the sky is actually violet; humans percieve the color of the sky as blue.