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The Excretory system — Biology STD 10 — Question

ICSE BoardEnglish MediumSTD 10BiologyThe Excretory system1 Mark
MCQ
In kidneys, urine is produced by:
  • A
    Dialysis, ultra filtration and tubular secretion.
  • B
    Ultra filtration, dialysis and tubular secretion.
  • ✓
    Ultra filtration, tubular reabsorption and tubular secretion.
  • D
    Tubular reabsorption and tubular secretion.
✓

Answer

Correct option: C.
Ultra filtration, tubular reabsorption and tubular secretion.
(c) Ultra filtration, tubular reabsorption and tubular secretion.
Explanation:
In kidneys, urine formation involves three processes: ultrafiltration (filtering blood to form urine), tubular reabsorption (reabsorbing essential substances), and tubular secretion (adding certain substances to urine).

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