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8.1 Exchange surfaces and diffusion

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Question 22
F

The rate of diffusion through a membrane is 12 arbitrary units. Its thickness increases from 0.2 mm to 0.6 mm. All other factors remain constant.

Using Fick's law, what is the new diffusion rate?

[1]
A

666 arbitrary units

B

444 arbitrary units

C

242424 arbitrary units

D

363636 arbitrary units

Markscheme

8.1 Exchange surfaces and diffusion Questions

  1. GCSE
  2. /Biology
  3. /8.1 Exchange surfaces and diffusion

42 exam-style questions on Edexcel GCSE Biology 8.1 Exchange surfaces and diffusion, covering 8.1.1 Introduction to exchange and transport, 8.1.2 Alveoli adapted for gas exchange, 8.1.3 Factors affecting rate of diffusion, and 8.1.4 Rate of diffusion using Fick's law. Each one has a worked solution and a mark scheme showing where the marks go.

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