A 25-year-old woman

complains of headaches, swelling, fatigue, and muscle weakness, sometimes

accompanied by a strange irregular heartbeat. An initial examination will

reveal high blood pressure, elevated sodium levels, and decreased potassium

levels in the blood. These symptoms are typical for a high level of aldosterone

in the body, which in this patient is caused by hyperplasia (increased cell numbers)

of the adrenal cortex. Aldosterone leads to the reabsorption of sodium and

water in the tubules, and conversely increases the excretion of potassium. In

which part of the nephron is found receptors for aldosterone?