Carbon dioxide is a waste product in respiring muscle cells and diffuses from the cells into nearby blood vessels.
A student writes:
“If the blood carries carbon dioxide away from the muscle more quickly, carbon dioxide will diffuse out of the muscle cells more slowly.”
Explain why the student's statement is incorrect.
102 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.