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Chapter Five Vocabulary
vocab
4
Biology
9th Grade
01/24/2014

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Term
the movement of substances across a cell membrane without the use of energy by the cell
Definition
passive transport
Term
the movement of particles from regions of higher density to regions of lower density
Definition
diffusion
Term
a difference in the concentration of a substance across a distance
Definition
concentration gradient
Term
in biology, a state that exists when the concentration of a substance is the same throughout a space
Definition
equilibrium
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