Waec Model Questions Vol1 2025 Biology Question 23

Practice objective / multiple choice question 23 from the 2025 Waec Model Questions Vol1 Biology examination.

Waec Model Questions Vol1 2025 Biology Objective / Multiple Choice Medium Difficulty
Question 23 WAEC_MODEL_QUESTIONS_VOL1 • 2025 • BIOLOGY • objective

In a mammal the glomerular filtration rate (GFR) is 120 mL·min⁻¹. Plasma Na⁺ concentration is 145 mEq·L⁻¹ and plasma glucose concentration is 5 mmol·L⁻¹. Ninety‑nine percent of the filtered Na⁺ and eighty‑five percent of the filtered glucose are reabsorbed. Calculate the amount of Na⁺ (in mEq·min⁻¹) and glucose (in mmol·min⁻¹) that appear in the urine each minute, and indicate which solute contributes more to the osmolar load of the urine per minute.

Answer Options

A. Na⁺ 0.176 mEq·min⁻¹, glucose 0.09 mmol·min⁻¹; Na⁺ contributes more
B. Na⁺ 0.174 mEq·min⁻¹, glucose 0.09 mmol·min⁻¹; glucose contributes more
C. Na⁺ 0.174 mEq·min⁻¹, glucose 0.10 mmol·min⁻¹; Na⁺ contributes more
Correct Answer D. Na⁺ 0.174 mEq·min⁻¹, glucose 0.09 mmol·min⁻¹; Na⁺ contributes more
Correct Answer
D
Correct Option:
Na⁺ 0.174 mEq·min⁻¹, glucose 0.09 mmol·min⁻¹; Na⁺ contributes more

About This Question

This is Waec Model Questions Vol1 2025 Biology Question 23. It is one of the objective questions from the 2025 Waec Model Questions Vol1 Biology examination.

Difficulty level: Medium .

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