What is the main action of aldosterone in the distal nephron?
Correct answer: A. Increasing sodium reabsorption and potassium secretion
- A. Increasing sodium reabsorption and potassium secretion
- B. Increasing glucose filtration and calcium secretion
- C. Decreasing sodium reabsorption and potassium retention
- D. Blocking water reabsorption in collecting ducts
Explanation
Aldosterone promotes sodium reabsorption and potassium secretion mainly in the distal tubule and collecting duct. ADH, rather than aldosterone, is the main hormone that directly increases collecting duct water permeability.
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About Urinary System
The urinary system includes the kidneys, ureters, urinary bladder and urethra, with emphasis on nephron structure and urine formation. It explains glomerular filtration, tubular reabsorption, tubular secretion, water and electrolyte regulation, acid base balance, and the roles of ADH and aldosterone in maintaining homeostasis.
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