NECO Biology 2025 Objective — Question 14
Question 14 of 50 from the National Examinations Council (NECO) Biology 2025 Objective paper, with the correct answer and a full explanation.
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Urine, when compared with blood in mammals is hypertonic because
- A. urine contains high percentage of all cells
- B. all traces of sugar have been removed from urine
- C. urea is actively secreted into the renal tubules
- D. much water has been removed from urineCorrect
Explanation
Urine is hypertonic compared to blood because the kidneys have concentrated the waste products, including salts and urea, by reabsorbing water back into the bloodstream, making the urine more concentrated (much water has been removed).
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