CAIE IGCSE Biology 3.1.4 Importance of Diffusion

Practise explaining how diffusion supplies cells with gases or dissolved substances and removes products such as carbon dioxide across exchange surfaces and cell membranes.

[Maximum number: 1]

The diagram shows a section through an alveolus and through a capillary.

Figure for Question 3.1.4—Importance of diffusion question 1 — CAIE IGCSE Biology

How does carbon dioxide move from Y to X ?

A

by diffusion

B

by osmosis

C

by translocation

D

by transpiration

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3.1.4—Importance of diffusion question 1