Question 6
FEmphysema is a lung disease. In emphysema, the walls between the alveoli break down.
The Figure shows lung tissue from a healthy person and lung tissue from a person with emphysema.
Figure
a.[2]
Describe two differences between the healthy lung tissue and the lung tissue with emphysema shown in the Figure.
b.[3]
Explain why a person with emphysema has a lower concentration of oxygen in their blood than a healthy person.
c.[2]
People with emphysema often breathe faster than healthy people, even when they are resting.
Suggest why.
8.1 Exchange surfaces and diffusion Questions
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.