Neco 2021 Biology Question 18
Practice objective / multiple choice question 18 from the 2021 Neco Biology examination.
The glomerular filtration rate (GFR) is 120 mL·min\(^{-1}\). Plasma sodium concentration is 145 mmol·L\(^{-1}\). Ninety‑nine percent of the filtered Na\(^+\) is reabsorbed before the distal tubule, and the remaining 1% is excreted. (a) Calculate the amount of Na\(^+\) (in mmol) excreted per minute under normal conditions. (b) A diuretic increases Na\(^+\) excretion by 20% without changing GFR. Assuming that each mmol of Na\(^+\) excreted draws 1 mL of water, determine the change in blood volume (in mL) per minute caused by the diuretic.
Answer Options
About This Question
This is Neco 2021 Biology Question 18. It is one of the objective questions from the 2021 Neco Biology examination.
Difficulty level: Medium .
Master the Exam!
You've seen a preview, but there are thousands more questions plus AI tutor to break down complex solutions.