Sample Questions — Function of the tubules
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MCQ
Which hormone controls water reabsorption in the collecting duct?
✅ Correct Answer: C
ADH makes the collecting duct more permeable to water.
MCQ
Which segment of the nephron helps maintain blood pH by secreting H⁺ ions and ammonia?
✅ Correct Answer: D
DCT helps in maintaining the pH and sodium-potassium balance in blood.
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MCQ
Which part of the nephron allows conditional reabsorption under hormonal control?
✅ Correct Answer: B
It responds to aldosterone and other signals.
MCQ
9. Which nephron part does NOT contribute to water reabsorption?
✅ Correct Answer: A
It is impermeable to water.
MCQ
10. Why is ascending limb’s impermeability to water vital for urine concentration?
✅ Correct Answer: C
Solutes like Na+ are actively reabsorbed here to create a gradient.
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