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Biology Unit 4 vocab

TermDefinition
active transport requires energy against the concentration gradient
Concentration Gradient difference in the concentration of a substance from 1 area to another
Diffusion Particles move from an area of high concentration to low
Endocytosis process by which a cell takes material into the cell by infolding of the cell membrane
Exocytosis Process by which a cell releases large amounts of material
facilitated diffusion Molecules that cannot directly diffuse across the membrane pass through special protein channels
Fluid mosaic model embedded in the lipid bilayer of most cell membranes; protein molecules
hypertonic solution above strength; more concentration
hypotonic solution below strength; less concentration
isotonic solution same strength; equal concentration
osmosis Diffusion of water through a selectively permeable membrane
passive transport Every living cell exists in a liquid environment
selective permeable Some substances can pass across them, and others cannot
solute A substance that is dissolved in a solution
solvent dissolving substance in a solution
Created by: user-2069312
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