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GCSE Biology Coursework "Osmosis": - The Potato Experiment Background Information Osmosis can be defined as the movement of water across a semi-permeable membrane from a region of high water concentration to a region of low water concentration. The semi-permeable membrane allows small particles through it but does not allow large particles such as sodium chloride. Osmosis will continue until a state of equilibrium is reached i.e. there is no area with a higher or lower concentration than another area. To land plants, water and osmosis are vital as they play leading roles in the structural support of a plant. Lack of water will lead to a plant wilting (becoming flaccid) and possibly dieing. Osmotic pressure. If a plant was placed in a waterlogged area, where the external solute to the cell (being less concentrated (or hypertonic) to the cell vacuole contents) the cell will not continue to take in water via osmosis for ever. The...

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