Which Hormone Affects Blood Volume

Question

Which hormone affects blood volume?
A) PTH
B) Erythropoietin
C) Insulin
D) Aldosterone

Accepted Answer

Aldosterone is a hormone produced by adrenal glands that affects blood volume by regulating the amount of sodium and water reabsorbed by the kidneys. Increased levels of aldosterone result in increased reabsorption of sodium and water, leading to an increase in blood volume.