Cells: Exchange with the environment

Created by joyceforbes 

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diffusion

the process by which molecules move from an area of higher concentration to an area of lower concentration

osmosis

diffusion of water through a selectively permeable membrane

endocytosis

the process by which a cell membrane surrounds a particle and encloses the particle in a vesicle to bring the particle into the cell

exocytosis

the process by which a substance is released from the cell through a vesicle that transports the substance to the cell surface and then fuses with the membrane to let the substance out

passive transport

The movement of substances across a cell membrane without the use of energy by the cell.

active transport

movement of substances across a cell membrane using energy..low to high concentration

semi-permeable

certain substances can pass through

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