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Definition of 'facilitated diffusion'

U.S. National Library of Medicine

1. facilitated diffusion
The passive movement of molecules exceeding the rate expected by simple diffusion. No energy is expended in the process. It is achieved by the introduction of passively diffusing molecules to an enviroment or path that is more favorable to the movement of those molecules. Examples of facilitated diffusion are passive transport of hydrophilic substances across a lipid membrane through hydrophilic pores that traverse the membrane, and the sliding of a DNA BINDING PROTEIN along a strand of DNA.

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"facilitated diffusion." Definitions.net. STANDS4 LLC, 2012. 31 May. 2012. http://www.definitions.net/definition/facilitated diffusion

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