Three factors affect the rate at which a substance diffuses into a cell.
Name the three factors that affect the rate of diffusion.
The cell membrane of one type of cell is folded into many small projections. Explain how these folds increase the rate of diffusion into the cell.
Oxygen diffuses into a muscle cell faster when the muscle cell is respiring quickly. Explain why.
58 exam-style questions on AQA GCSE Biology 1.3 Transport in cells, covering 1.3.1 Diffusion, 1.3.2 Osmosis, and 1.3.3 Active transport. Each one has a worked solution and a mark scheme showing where the marks go.