9.26_Osmosis

9.26_Osmosis - Osmosis-Diffusion of water through a...

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Osmosis - Diffusion of water through a barrier -from high to low [water] -from low to high [solute] -Osmolarity -total [solutes] in a solution (mol/L) e.g. 3 mol Na + 2 mol Gluc. in 1L= 5 osmolarity 3 mol NaCl+2 mol Gluc. in 1L= 8 Osmolarity -increase in osmolarity= decrease in [water] -Comparison terms -Hypertonic= increase [solute] – outside cell -Isotonic= same [solute] outside cell -Hypotonic= decrease [solute] outside cell -Osmotic Pressure (OP) 1) Permeable to both 2) Permeable to only H2O -If membrane cannot slide, the diffusion of water will generate a pressure (osmotic pressure) -Force applied to prevent diffusion= OP -OP occurs when 1) Membrane is semi permeable 2) Immobile membrane -increase osmolarity= increase osmotic pressure -Size of cells impacted by water movement -hypertonic solution= cell shrinks -isotonic solution= no change cell volume -hypotonic= cell swells - Vesicular Transport (when you can’t get furniture in the door/window) -AKA endocytosis (bring into cell) / exocytosis (get out of cell)
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This note was uploaded on 04/22/2008 for the course EEOB 232 taught by Professor Bronson during the Spring '07 term at Ohio State.

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9.26_Osmosis - Osmosis-Diffusion of water through a...

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