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Related Flashcards
Cards In This Set
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Passive Transport
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Movement across the cell membrane that does not require energy from the cell
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Concentration gradient
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A difference in the concentration of a substance across a space
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Equilibrium
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Condition in which the concentration of a substance is equal throughout a space
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Diffusion
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The movement of a substance from an area of high concentration to an area of low concentration
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Osmosis
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The diffusion of water through a selectively permeable membrane
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Hypertonic solution
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A solution that causes a cell to shrink because of osmosis
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Hypotonic solution
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A solution that causes a cell to swell because of osmosis
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Isotonic solution
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A solution that produces no change in cell volume because of osmosis
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Ion channel
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Transport protein with a polar pore through which ions can press
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Carrier proteins
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A protein that transports substances across a cell membrane
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Facilitated diffusion
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Type of passive transport that moves substances down their concentratino gradient without using the cell's energy
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Active transport
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The transport of a substance across the cell membrane against its concentration gradient
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Sodium-potassium pump
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Transports three sodium ions (Na+) out of a cell and two potassium ions (K+) into the cell
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Endocytosis
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 The movement of a substance into a cell by a vesicle |
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Exocytosis
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 The movement of a substance by a vesicle to the outside of a cell |
