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Biology Vocab. #3

biology vocab. quiz 3. omosis

termdefinition
facilitated diffusion a process in which substances move down their concentrated gradient across the cell membrane with the assistance of carrier proteins
turgor pressure water pressure within a plant cell
passive transport the movement of substances across a cell membrane without the use of cell energy
active transprt the movement of a substance across a cell membrane against a concentration gradient; requires the cell to expand energy
phagocyte a cell that engages in phagocytosis
concentration gradient the difference in concentration of a substance across a space
hypertonic describing a solution whose solute concentration is higher then that inside a cell
hypotonic describing a solution whiose solute concentration is lower than that inside a cell
isotonic describing a solution whose solute condcentration equals that inside a cell
endocytosis the process by which a cell surrounds and engulfs substances
exocytosis a process in which a vesicle inside a cell fuses with the cell membrane and releases its contents to the external enviroment
cytosis the bursting of a cell
equilibrium a state that exists when the concentration of a substance is the same throughout a space
vesicle a membrane-bound sac in a eukaryotic cell thatt contains materials involved in endocytosis, exocytosis or transport within a cell
carrier protein protein that transports specific substances across a biological mambrane
diffusion the process by which molecules move from an area of greater concentration to an area of lesser concentration
osmosis the diffusion of water across a selectively permeable membrane
Created by: koolshanana12
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