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Move thro Membranes
Movement through Membranes CC
| Term | Definition |
|---|---|
| Diffusion | the movement of molecules from a region of high solute concentration to a region of lower solute concentration e.g. gaseous exchange in alveoli. |
| Osmosis | the movement of water from a region of high solvent concentration to a region of lower solvent concentration through a semi-permeable membrane, until both concentrations are equal. |
| Selectively permeable membrane | also semi-permeable or partially permeable. This refers to the cell membrane. Allows certain molecules or ions to pass through but prevents others. |
| Turgor | state of a plant cell due to pressure built up in the cell; exerted outwards and caused by the cell taking in water by osmosis. |