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4 Cards in this Set
- Front
- Back
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simple difusion
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the spontanious movement of a substance from a region of higher concentration to a region of lower concentration
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facilitated difusion
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the movement of a substance from a region of higher concentration to a region of lower concentration with the aid of a membrain protein that either transports the substance from one side to the other or forms a channel hrough which it can move
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active transport
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the movement of molecules across the plasma membrain, ushually against a concentration graident (from a region of lower concentration to higher concentration) eith the aid of a carrier protein and energie ( ushually in the form of adenosine triphosphate, or AP) supplied by the cell
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osmosis
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a special case of difusion in which water moves across the plasma membrain or any other selectivly permiable membrain from a region of lower concentration solute to an area of higher area concenration of solute
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