TONICITY – BIOCHEMISTRY – Flashcards
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Osmosis
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- movement of water molecules from an area where there is more H2O -> less water through a selectively permeable membrane
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Isotonic Solution
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- same amount of solute as that found inside the cell - water moves in and out at equal rate
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Animal Cell Isotonic
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- no change in cell
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Plant Cell Isotonic
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- the plant wilts (flaccid)
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Hypotonic Solution
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- less solute than that found inside the cell - water moves into cell
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Animal Cell Hypotonic
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- increase osmotic pressure - cell swells and may burst
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Cytolysis
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cell may burst
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Plant Cell Hypotonic
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- increase osmotic pressure - turgor pressure - makes plant turgid (doesn't burst due to cell wall)
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Hypertonic Solution
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- more solute than that found inside the cell - water moves out of cell
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Animal Cell Hypertonic
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- decrease osmotic pressure - cell shrinks
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Crenation
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- cell shrinks
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Plant Cell Hypertonic
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- decrease in turgor pressure - plant wilts
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Plasmolysis
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- decrease in turgor pressure
