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Osmotic Pressure is that the minimum pressure which must be applied to an answer to stop the inward flow of its pure solvent across a membrane. It's also defined because the measure of the tendency of an answer to require in pure solvent by osmosis. Potential pressure is that the maximum pressure that would develop during a solution if it were separated from its pure solvent by a membrane. Osmosis occurs when two solutions containing different concentrations of solute are separated by a selectively permeable membrane. Solvent molecules pass preferentially through the membrane from the low-concentration solution to the answer with higher solute concentration. The transfer of solvent molecules will continue until equilibrium is attained. Pressure measurement could also be used for the determination of molecular weights. Osmotic pressure is a crucial factor affecting cells. Osmoregulation is that the homeostasis mechanism of an organism to succeed in balance in pressure. When a biological cell is during a hypotonic environment, the cell interior accumulates water, water flows across the cell wall into the cell, causing it to expand. In plant cells, the cell membrane restricts the expansion, leading to pressure on the cell membrane from within called turgor pressure. Turgor pressure allows herbaceous plants to face upright. It's also the determining factor for a way plants regulate the aperture of their stomata. In animal cells excessive pressure may result in cytolysis.      

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