Question Detail
Question
Which one of the following increases the uptake of sodium ions and water in the kidney with simultaneous elimination of potassium ions?
Correct Answer
Option D is the correct answer.
Detailed Explanation
Aldosterone is a mineralocorticoid hormone that acts on the distal tubules and collecting ducts of the nephron. It increases the reabsorption of sodium ions (and thus water follows osmotically) and increases the secretion of potassium ions, helping to regulate blood pressure and electrolyte balance. Vasopressin (ADH) increases water reabsorption only; renin is an enzyme; parathormone regulates calcium.
Hint
This hormone is part of the renin-angiotensin-aldosterone system (RAAS) and is key for sodium retention and potassium excretion.