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Ch. 4.1

diffusion The movement of particles from an area that is more crowded to an area that is less crowded.
equilibrium When the system is balanced and there is the same amount of particles inside and outside of the cell.
osmosis The movement of water across a selectively permeable membrane.
selectively permeable membrane A membrane that allows somethings to pass through it and others can not.
passive transport Type of transport in which particles move from an area of high concentration to low concentration and no energy is used
active transport Type of transport in which particles move from an area of low concentration to high concentration and lots of energy is used.
facilitated diffusion When particles move into or out of the cell through protein channels WITHOUT using energy.
endocytosis When the cell membrane wraps around a particle and brings it into the cell.
exocytosis When vesicles move materials to the cell membrane and materials are released from the cell.
hypertonic solution Solution in which there is a high concentration outside of the cell so water leaves the cell and the CELL SHRINKS
hypotonic solution Solution in which there is a low concentration outside of the cell so water enters the cell and the CELL SWELLS
isotonic solution Solution in which the concentration is about the same inside and outside of the cell so the cell stays the same.
Created by: figueroad
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