Igcse Model Questions Vol1 2021 Biology Question 27

Practice objective / multiple choice question 27 from the 2021 Igcse Model Questions Vol1 Biology examination.

Igcse Model Questions Vol1 2021 Biology Objective / Multiple Choice Medium Difficulty
Question 27 IGCSE_MODEL_QUESTIONS_VOL1 • 2021 • BIOLOGY • objective

The renal plasma flow is \(600\ \text{mL min}^{-1}\) and the filtration fraction is \(20\%\). Plasma sodium concentration is \(145\ \text{mmol L}^{-1}\). If \(99\%\) of the filtered sodium is re‑absorbed, calculate the amount of sodium excreted per minute.

Answer Options

A. 0.150 mmol min⁻¹ (≈0.15 mmol min⁻¹)
Correct Answer B. 0.174 mmol min⁻¹ (≈0.17 mmol min⁻¹)
C. 0.200 mmol min⁻¹ (≈0.20 mmol min⁻¹)
D. 0.100 mmol min⁻¹ (≈0.10 mmol min⁻¹)
Correct Answer
B
Correct Option:
0.174 mmol min⁻¹ (≈0.17 mmol min⁻¹)

About This Question

This is Igcse Model Questions Vol1 2021 Biology Question 27. It is one of the objective questions from the 2021 Igcse Model Questions Vol1 Biology examination.

Difficulty level: Medium .

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