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WAEC Biology 2013 Question 17

Question 17

Excretion

In humans, excretion of hypertonic urine is associated with the

  1. A.distal convoluted tubule.
  2. B.loop of Henle.
  3. C.bowman's capsule.
  4. D.proximal convoluted tubule.
Show the answer and explanation

Answer: B (loop of Henle.)

Explanation

The loop of Henle pumps salt into the medulla, making the tissue around the collecting ducts very salty. Water is then drawn out of the urine, so the urine passed is hypertonic.