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Biology 2

TermDefinition
Osmosis process by which water molecules diffuse through a membrane
Facilitated diffusion diffusion occurs with the help of a carrier molecule across a cell membrane
Diffusion process by which molecules move from areas of high concentration to area of low concentration
Endocytosis process of taking materials into the cell by means of infoldings, or pockets of the cell membrane
Phagocytosis “cell eating” extensions of the cytoplasm
Pinocytosis pockets from along the cell membrane, fil with liquid and pinch off to form vacuoles within the cell
Exocytosis membrane of the vacuole surrounding the material fuses with the cell membrane, forcing the contents out of the cell
Passive Transport Molecules move from an area of high concentration to areas of low concentration
Active Transport Molecules are pushed from regions of low concentrations to areas of high concentration
Isotonic solution The concentration of solutes is the same inside and outside the cell. Because of this the cell size remains the same when placed in an isotonic solution
Hypertonic solution The solution has a higher concentration of solutes that the cell. Because of the the cell will shrink or shrivel when placed in the solution
Hypotonic solution “Under solute” The solution has a lower concentration of solutes than the cell. Because of this the cell will swell when placed in the solution
Created by: 2667155831