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ICSE Class 10 Biology Question 17 of 21

Multiple-Choice Questions — Question 17

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Question 17

Thomas played cricket on a hot summer afternoon. His urine output was much less, though he drank plenty of water. What could be the possible cause?

Thomas played cricket on a hot summer afternoon. His urine output was much less, though he drank plenty of water. What could be the possible cause? Biology Competency Focused Practice Questions Class 10 Solutions.

P - Kidneys reabsorb a lot of water
Q - Sweat glands are active
R - Kidneys absorb less water
S - Sweat glands are inactive

  1. R and Q
  2. P and Q
  3. P and S
  4. R and S
Answer

P and Q

Reason — While playing, the player loses most of water through the sweat glands. Therefore, the kidneys reabsorb most of the water back in the blood to maintain the composition and osmotic pressure of blood. This results in less volume of urine.