Waec Model Questions Vol1 2021 Biology Question 20
Practice objective / multiple choice question 20 from the 2021 Waec Model Questions Vol1 Biology examination.
According to Fick's law, the rate of diffusion (J) of a gas across a membrane is given by J = (D × A × ΔP) / T, where D is the diffusion coefficient, A the surface area, ΔP the partial‑pressure difference and T the membrane thickness. Initially, the alveolar membrane has A = 70 cm², T = 0.20 cm, ΔP = 100 mmHg and D = 0.003 cm²·mmHg·s⁻¹. During vigorous exercise the alveolar surface area increases by 20 % and the membrane thickness decreases by 10 %. What is the percentage increase in the diffusion rate of oxygen under these new conditions? Give your answer to one decimal place.
Answer Options
About This Question
This is Waec Model Questions Vol1 2021 Biology Question 20. It is a objective / multiple choice question from the 2021 Waec Model Questions Vol1 Biology examination.
Difficulty level: Medium .
Master the Exam!
You've seen a preview, but there are thousands more questions plus AI tutor to break down complex solutions.