Answer to Question 1
B
The antidiuretic hormone controls how much water leaves the body by reabsorbing water in the renal tubules.
Answer to Question 2
C
The kidney makes most of the body's erythropoietin stimulating factor, which then prompts the liver to release erythropoietin for erythrocyte production. Damaged kidneys produce decreased amounts of erythropoietin, which ultimately leads to decreased red blood cell production and anemia. Diabetes, hypertension, and acid reflux do not cause anemia.