Which adrenal gland hormone plays a role in urine concentration in the kidneys?

A) cortisol
B) antidiuretic hormone (ADH)
C) aldosterone
D) sex hormone
E) epinephrine

Aldosterone is a steroid hormone produced by the adrenal gland that regulates the balance of electrolytes in the body by promoting reabsorption of sodium ions and excretion of potassium ions in the kidneys. This results in increased water reabsorption and urine concentration, thus playing a role in controlling fluid balance in the body.