Question 1
FThe Figure shows an alveolus and a blood capillary in the lungs.
Figure
a.[1]
Name gas X.
b.[1]
Name gas Y.
c.[1]
Name the process by which gases X and Y move between the alveolus and the blood.
d.[1]
Give one feature shown in the Figure that helps gases to move quickly between the alveolus and the blood.
e.[1]
Give one feature of the lungs that provides a large surface area for gas exchange.
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.