Substances move in and out of cells using different transport processes.
Complete the table by identifying the primary biochemical or cellular process used for each example of substance movement.
| Example of substance movement | Process |
|---|---|
| Carbon dioxide moving from the air spaces in a leaf into photosynthesising palisade cells | |
| Mineral ions (such as nitrates) being absorbed from a low concentration in the soil into root hair cells | |
| Water moving across a selectively permeable membrane from a region of high water potential to low water potential |
Explain how the structure of the villi in the human small intestine is adapted for the efficient absorption of soluble nutrients.
23 exam-style questions on Edexcel IGCSE Biology Movement of substances into and out of cells. Each one has a worked solution and a mark scheme showing where the marks go.