17 terms

Cell Transport

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hyper-
over, above
hypo-
under, below
iso-
equal, same
solution
A mixture that forms when one substance dissolves another.
solute
the substance that is dissolved
solvent
A liquid substance capable of dissolving other substances
hypertonic
when comparing two solutions, the solution with the greater concentration of solutes
hypotonic
when comparing two solutions, the solution with the lesser concentration of solutes
isotonic
Having the same solute concentration as another solution.
passive transport
Requires NO energy, Movement of molecules from high to low concentration, Moves with the concentration gradient
active transport
Energy-requiring process that moves material across a cell membrane against a concentration difference
concentration gradient
difference in the concentration of a substance from one location to another
diffusion
Movement of molecules from an area of higher concentration to an area of lower concentration.
osmosis
Diffusion of water through a selectively permeable membrane
facilitated diffusion
process of diffusion in which molecules pass across the membrane through cell membrane channels
Endocytosis
A process in which a cell engulfs extracellular material through an inward folding of its plasma membrane.
Exocytosis
release of substances out a cell by the fusion of a vesicle with the membrane.