chapter 2-1

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1

diffusion

the movement of particles from an area where their concentration is high to an area where their concentration is low

2

osmosis

the diffusion of water across a cell membrane

3

passive transport

the diffusion of particles through protiens in the cell membrane from areas where the concentration of particles is high to areas where the concentration is low

4

active transport

the movement of particles through protiens in the cell membrane against the direction of diffusion; requires cells to use energy

5

endocytosis

the process in which a cell membrane surronds a particle and encloses it in a vesicle to bring it into the cell

6

exocytosis

the process used to to remove large particles from a cell; during exocytosis, a vesicle containing the particles fuses with the cell membrane