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Biology Section 3.3: Cell Transport Flashcards

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2715028157Concentrationthe amount of the substance (solute) dissolved in a unit of the other substance (solvent)0
2715028365Concentration gradientthe difference in concentration of a particular molecule between two regions1
2715028366Passive transportthe process of molecular movement which does not require energy2
2715029910Diffusionthe net movement of molecules down a concentration gradient3
2715030282Facilitated diffusionthe movement of molecules down a concentration gradient with the aid of membrane proteins4
2715030283Ion channelsthe membrane proteins that open and close to allow specific ions to pass through5
2715030806Carrier proteinsthe membrane proteins that bind to specific large molecules6
2715030807Isotonica solution with the same concentration (same amount of solutes/water) as a comparable solution7
2715030808Hypertonica more concentrated solution; the solution contains more solute and less water8
2715031181Hypotonica less concentrated solution; the solution contains less solute and more water9
2715031182Turgorthe rigid state of a cell due to high water pressure10
2715031183Osmosisthe diffusion of water through a selectively permeable membrane such as the cell membrane11
2715031768Active transportthe process of molecular movement which requires energy12
2715031769Ion pumpthe membrane proteins that pumps one-way against the ion's concentration gradient, a form of active transport13
2715031770Cotransportthe coupled passage of two molecules through a membrane such as the cell membrane, a form of active transport14
2715032032Symportthe coupled passage of two molecules through a membrane in the same direction, a form of active transport15
2715032033Antiportthe coupled passage of two molecules through a membrane opposite directions, a form of active transport16
2715032376Endocytosisthe action of the cell membrane surrounding outside materials and fusing with itself to bring in materials17
2715032377Exocytosisthe action of a vacuole of a cell fusing with the cell membrane to expel materials18
2715032645Homeostasisthe ability to maintain stable internal conditions independent of the conditions that exist in the environment19

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