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Ch.2 Cell In Action

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Term
Definition
diffusion   the movement of particles from regions of higher density to regions of lower density  
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osmsosis   the diffusion of water through a semipermeable membrane  
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passive transport   the movement of substances across a cell membrane WITHOUT the use of energy by the cell  
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active transport   the movement of substances across the cell membrane that REQUIRES the cell to use energy  
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[endo]cytosis   the process by which a cell membrane SURROUNDS a particle and encloses the particle in a vesicle to bring the particle into the cell  
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[exo]cytosis   the process in which a cell releases a particle by ENCLOSING the particle in a vesicle that then moves to the cell surface & fuses with the cell membrane  
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photosynthesis   the process by which plants, algae, & some bacteria use sunlight, carbon dioxide, & water to make food  
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cellular respiration   the process by which cells use oxygen to produce energy from food  
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fermentation   the breakdown of food WITHOUT the use of oxygen  
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cell cycle   the life cycle of a cell  
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chromosomes   in a eukaryotic cell, one of the structures in the nucleus that are made up of DNA, and protein; in a prokaryotic cell, the main ring of DNA  
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