Which of the following ion is least absorbed in tubules?: (A) Sodium, (B) Urea, (C) Creatinine, (D) Glucose
Answer is C. The urinary plasma ratio of Creatinine is 1:150 which shows the least reabsorption Glucose - 0, Sodium- 0.6, Urea- 60 Ref: Ganong 25th ed/page 679