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Cards In This Set
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Passive Transport
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Movement of materials across the cell membrane without using energy
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Diffusion
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The process of moving molecules down the concentration gradient
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Concentration gradient
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The difference in the quantity of molecules across a space
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Brownian Movement
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The constant, random movement of molecules due to their kinetic energy
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Equilibrium
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An equal distribution of a substance throughout a space
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Osmosis
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The diffusion of water across a membrane
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Isotonic Solution
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The concentration of solute and molecules are equal both inside and outside of the cell. (water stays where it is)
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Hypertonic solution
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The concentration of solutes is higher outside the cell (water will leave the cell to attempt to reach equilibrium)
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Hypotonic Solution
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The concentration of solutes is higher inside the cell (water will enter the cell)
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Cytolysis
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Increase in volume of water in the cell until it ruptures
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Turgor pressure
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Water pressure in a plant cell.
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Plasmolysis
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Loss of turgor pressure - plant wilts
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Facilitated diffusion
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A form of passive transport in which molecules that are too large to pass through the concentration gradient use transport proteins
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Ion Channels
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Used for ions which do not dissolve in lipids.
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Active Transport
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Moves substances UP the concentration gradient, requiring the cell to expel energy (ATP)
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