GCE Biology 2025 Objective — Question 14
Question 14 of 50 from the General Certificate of Education (GCE) Biology 2025 Objective paper, with the correct answer and a full explanation.
Advertisement
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).
Advertisement
Sign up free to unlock
- Score tracking
- Practice history
- Saved questions
- Progress dashboard
- Personalized sessions
- Weak-topic breakdown
…and/or go further with premium services and No Ads.