What is the main effect of antidiuretic hormone on the kidney?
Correct answer: B. It increases water permeability in collecting ducts
- A. It decreases water permeability in collecting ducts
- B. It increases water permeability in collecting ducts
- C. It prevents sodium filtration at the glomerulus
- D. It increases glucose secretion into tubular fluid
Explanation
Antidiuretic hormone increases water permeability in the late distal tubule and collecting ducts by promoting aquaporin insertion. This allows more water to return to the blood and produces concentrated urine.
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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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