Waec Model Questions Vol1 2020 Biology Question 43

Practice objective / multiple choice question 43 from the 2020 Waec Model Questions Vol1 Biology examination.

Waec Model Questions Vol1 2020 Biology Objective / Multiple Choice Medium Difficulty
Question 43 WAEC_MODEL_QUESTIONS_VOL1 • 2020 • BIOLOGY • objective
Waec Model Questions Vol1 2020 Biology Question 43 diagram

The diagram shows the partial pressures of oxygen (PO₂) and carbon dioxide (PCO₂) in the alveolar air, pulmonary artery blood and pulmonary vein blood. Using the values indicated, calculate (a) the diffusion gradient for O₂ from alveolus to blood, (b) the diffusion gradient for CO₂ from blood to alveolus, and (c) state which gas diffuses more rapidly assuming diffusion rate is directly proportional to the gradient.

Answer Options

A. O₂ gradient = 60 mmHg; CO₂ gradient = 12 mmHg; CO₂ diffuses more rapidly.
B. O₂ gradient = 48 mmHg; CO₂ gradient = 6 mmHg; CO₂ diffuses more rapidly.
Correct Answer C. O₂ gradient = 60 mmHg; CO₂ gradient = 6 mmHg; O₂ diffuses more rapidly.
D. O₂ gradient = 54 mmHg; CO₂ gradient = 6 mmHg; O₂ diffuses more rapidly.
Correct Answer
C
Correct Option:
O₂ gradient = 60 mmHg; CO₂ gradient = 6 mmHg; O₂ diffuses more rapidly.

About This Question

This is Waec Model Questions Vol1 2020 Biology Question 43. It is one of the objective questions from the 2020 Waec Model Questions Vol1 Biology examination.

Difficulty level: Medium .

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