| A | B |
|---|
| Cell membrane | Controls the movement of substances into and out of the cell |
| Membranes | Small molecules can diffuse through them, big ones cannot |
| Partially permeable | Describes a membrane which lets small molecules diffuse through it but not large ones |
| Osmosis | involves the diffusion of water |
| Turgid | A cell with a high pressure of water in it |
| Wilt | Happens to plants when their cells lose too much water |
| Flaccid | Word describing a cell which has lost so much water it has gone floppy |
| Support | Important job in a plant carried out by turgid cells |
| Cellophane | An artificial membrane can be made of this |
