Complete O/L notes biology: TURGIDITY AND FLACIDITY


When water enters the vacuum of a plant cell the volume of the cell sap increase and pressure is exerted against the wall this pressure is called turgor pressure.

When a cell is in this state(full) it is said to be turgid and the cell is fully stretch at this state the turgor pressure is equal to the pressure. If we put a plant cell into distilled water, it will swell and become turgid but not burse.

                When a cell suffers loss of water, it become soft and said to be acid. E.g. when we put a cell into salt solution it will drink and become softer. FLACIDITY which is also called WILTING. Usually occurs in the plant because the cell loss water to the atmosphere faster than when they can gain from the atmosphere.



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