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Human urine is usually acidic because:

  1. A
    Hydrogen ions are actively secreted into the filtrate.
  2. B
    The sodium transporter exchanges one hydrogen ion for each sodium ion, in peritubular capillaries.
  3. C
    Excreted plasma proteins are acidic
  4. D
    Potassium and sodium exchange generates acidity

Solution & Step-by-step Explanation

Urine is acidic (avg pH 6.0) because ions are actively secreted into the renal filtrate by the tubular cells to maintain the ionic and acid-base balance of body fluids.

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Human urine is usually acidic because:
A
Hydrogen ions are actively secreted into the filtrate.
B
The sodium transporter exchanges one hydrogen ion for each sodium ion, in peritubular capillaries.
C
Excreted plasma proteins are acidic
D
Potassium and sodium exchange generates acidity

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