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Osmosis
2/19/2023
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opa High water Potential Pure Water Example: 0 0 O State 0 4 of externation solution compared to cell -100 kPa Low water potential штокра 0 →Osmosis is the movement of water potential to area of membrane. across a •Only pure deionised water has a water potential of 0 kPa. water with has · Any water 0 0 Iso tonic solution Hypertonic solution Hypo tonic Solution • Lumen of digestive system J water diffuses from OkPa to -200 kPa ) Root hair cell Difference in Water Potential dissolved solution potential < o kPa. The more solute that is added (i.e the more lower (more negative) water potential. Hypertonic Shrinks Д Crenation (Shrinks) More negative M₂0 a Osmosis semi-permeable HÅ Dilute Solution 4 = -200 kPa 1 98 a an O 80 CI water from low 8 Isotonic Equal O ·Epithelial cell No change HO H 50 · Mid-root hair cell solution of equal water a solution of lower water solution of higher water Na H₂O O water T an area I 1 a water diffuses from -200 Pa to -500 kPa 0 concentrated a solution), the Concentrated solution 4 =-500 kPa potential Hypotonic Osmolysis (Bursts) of high move Tons You cannot without moving water. 8 Less negative 800 to a potential cell I"same strength") potential than a cell ("high strength") than a cell ("low strength") potential Swells & Bursts Bloodstream 0 50 • Top-root hair cell this process is Specifically called haemolysis in red blood cells Osmosis in Plant Cells Dividing a plant by 3 parts: ↳ Protoplast: Refers to plant cells without cell wall ↳ Cellulose cell wall Central va cuole 4 of externation solution compared to cell Net movement of water Protoplast Condition of cell Hypertonic More negative Leaves cell Shrinks Plasmolysed H₂O protoplast Completely pulled away from the cell wall Isotonic Equal No movement No change Incipient plasmolysis protoplast beginning to pull away from the cell wall Hypotonic Less negative Enters cell Swells Turgid •H₂O Protoplast pushed agains cell wall
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