A patient becomes dehydrated after several episodes of diarrhoea. Which renal response helps conserve water?
Correct answer: B. Increased ADH release and concentrated urine
- A. Reduced ADH release and dilute urine
- B. Increased ADH release and concentrated urine
- C. Reduced aldosterone release and concentrated urine
- D. Increased filtration and increased urine volume
Explanation
Dehydration stimulates ADH release, which increases water permeability in the late distal tubule and collecting ducts. More water returns to the blood, producing a smaller volume of 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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