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Ch. 4.1
Question | Answer |
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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. |