Igcse Model Questions Vol1 2023 Biology Question 30

Practice objective / multiple choice question 30 from the 2023 Igcse Model Questions Vol1 Biology examination.

Igcse Model Questions Vol1 2023 Biology Objective / Multiple Choice Medium Difficulty
Question 30 IGCSE_MODEL_QUESTIONS_VOL1 • 2023 • BIOLOGY • objective

Renal plasma flow (RPF) is 600 mL·min⁻¹ and the filtration fraction (FF) is 20%.\n\n(a) Calculate the glomerular filtration rate (GFR) in mL·min⁻¹.\n\n(b) Plasma sodium concentration is 145 mmol·L⁻¹. If 99% of the filtered sodium is re‑absorbed, how many millimoles of sodium are excreted per minute?

Answer Options

Correct Answer A. GFR = 120 mL·min⁻¹; Na⁺ excreted = 0.174 mmol·min⁻¹
B. GFR = 150 mL·min⁻¹; Na⁺ excreted = 0.217 mmol·min⁻¹
C. GFR = 120 mL·min⁻¹; Na⁺ excreted = 0.348 mmol·min⁻¹
D. GFR = 100 mL·min⁻¹; Na⁺ excreted = 0.145 mmol·min⁻¹
Correct Answer
A
Correct Option:
GFR = 120 mL·min⁻¹; Na⁺ excreted = 0.174 mmol·min⁻¹

About This Question

This is Igcse Model Questions Vol1 2023 Biology Question 30. It is one of the objective questions from the 2023 Igcse Model Questions Vol1 Biology examination.

Difficulty level: Medium .

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