osmosis is the diffusion fo molcules froma high water poteinal to a low water potential across a partial permeable memberanr
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facts about water potential
water pteinatil for pure water is 0 as the molecules are free to move about and it us usually the negative, the smaller the number the higher the water potential
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what does solute potentail mean
solute poetentail is concetnatraion of dissolved subsnatnces in vacuole
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what is pressure potential
the hydrostaic pressure of the water pushing outwards, and the opposing force of the cell wall pushing in
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what is plasmolysis
when the concentration of the solution outside the cell is lower than conc inside cell this is hypertionic, thewater moves out of the cell by osmosis and cell becomes flacid, vacuole shrinks and cell membrane moves away from cell wall
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what is incipient plasmolyis
where 50% of the memberane has moved away from the wall
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what is diffusion
movement of mollecules form a high concentration to a low concentration
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what is needed for diffusion to happen
large surface area, small diffusion pathways, thin
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what is active transport
the movemrnt of molecules against the concentration gradient firm a low to high concentration
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active transport facts
will take place but ATP is needed, will not take place with respiritory inhibitor cyanide
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Front
facts about water potential
Back
water pteinatil for pure water is 0 as the molecules are free to move about and it us usually the negative, the smaller the number the higher the water potential
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