Neco Model Questions Vol1 2017 Biology Question 15
Practice objective / multiple choice question 15 from the 2017 Neco Model Questions Vol1 Biology examination.
In an experiment the diffusion rate of oxygen across an alveolar membrane is measured as \(0.12\) cm³·s(^{-1}\) when the concentration difference across the membrane is \(0.04\) mol·cm(^{-3}\) and the membrane thickness is \(0.02\) cm. Assuming the rate follows Fick's law in the form \(R = D\,\frac{\Delta C}{d}\), where \(D\) is a constant for the given conditions, \(\Delta C\) is the concentration difference and \(d\) is the thickness,\n\n(a) Determine the value of \(D\).\n(b) If the membrane thickness is reduced to \(0.015\) cm and the concentration difference increases to \(0.05\) mol·cm(^{-3}\), what is the new diffusion rate? Give your answer to two decimal places in cm³·s(^{-1}\).
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This is Neco Model Questions Vol1 2017 Biology Question 15. It is one of the objective questions from the 2017 Neco Model Questions Vol1 Biology examination.
Difficulty level: Medium .
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