Waec Model Questions Vol1 2023 Biology Question 47

Practice objective / multiple choice question 47 from the 2023 Waec Model Questions Vol1 Biology examination.

Waec Model Questions Vol1 2023 Biology Objective / Multiple Choice Medium Difficulty
Question 47 WAEC_MODEL_QUESTIONS_VOL1 • 2023 • BIOLOGY • objective
Waec Model Questions Vol1 2023 Biology Question 47 diagram

The diagram of a human alveolus shows the labelled parameters: alveolar surface area A = 150 cm², membrane thickness d = 0.5 µm, diffusion coefficient for O₂ D = 2.1×10⁻⁵ cm²·s⁻¹, alveolar O₂ partial pressure P_A = 100 mmHg and capillary O₂ partial pressure P_c = 40 mmHg. Using Fick's law (Rate = D·A/d·ΔP), calculate the diffusion rate of O₂ (in mL·min⁻¹) and state whether this rate is sufficient to meet a resting O₂ consumption of 250 mL·min⁻¹.

Answer Options

A. Diffusion rate ≈ 3.0×10⁵ mL·min⁻¹; therefore it easily meets the 250 mL·min⁻¹ requirement
B. Diffusion rate ≈ 2.27×10⁴ mL·min⁻¹; therefore it does not meet the 250 mL·min⁻¹ requirement
Correct Answer C. Diffusion rate ≈ 2.27×10⁵ mL·min⁻¹; therefore it easily meets the 250 mL·min⁻¹ requirement
D. Diffusion rate ≈ 1.5×10⁵ mL·min⁻¹; therefore it meets the 250 mL·min⁻¹ requirement
Correct Answer
C
Correct Option:
Diffusion rate ≈ 2.27×10⁵ mL·min⁻¹; therefore it easily meets the 250 mL·min⁻¹ requirement

About This Question

This is Waec Model Questions Vol1 2023 Biology Question 47. It is one of the objective questions from the 2023 Waec Model Questions Vol1 Biology examination.

Difficulty level: Medium .

View More Waec Model Questions Vol1 2023 Biology Questions More Waec Model Questions Vol1 Practice Questions Back to Questions

Master the Exam!

You've seen a preview, but there are thousands more questions plus AI tutor to break down complex solutions.

Unlock Full Access Available for Android & Windows
Chat with Support