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→ Define Osmosis?
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Movement of a solvent (such as water) through a semipermeable membrane (as of a living cell) into a solution of higher solute concentration that tends to equalize the concentrations of solute on the two sides of the membrane.
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Osmosis, the spontaneous passage or diffusion of water or other solvents through a semipermeable membrane (one that blocks the passage of dissolved substances—i.e., solutes).
- Osmosis is the movement of water through a cell membrane.
- The pressure that moves water in and out of cells is called water potential.
- Water moves from a region with a high water potential to a region with a lower water potential.
- Pure water has a high water potential and so water is very likely to move into cells if they have water around them.
- Solutes lower water potential and so cells have a lower water potential than pure water.
- Plant cells take in water by osmosis until the cell wall pushes back on the cell's contents with the same pressure
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