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passive transport |
Also found in: Dictionary/thesaurus, Encyclopedia, Wikipedia, Hutchinson | 0.03 sec. |
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passive transport, the movement of small molecules across the membrane of a cell by diffusion. Passive transport occurs when the chemicals outside a cell become concentrated and start moving into the cell, changing the intracellular equilibrium. Passive transport is essential to various processes of metabolism, such as the intake of digestive products by the cells lining the intestines. Compare active transport, osmosis. transport, n the movement of biochemical substances from one site to another. transport, active, n transport of substances through membranes or epithelium, requiring metabolic energy. transport, passive, n transport along a gradient without the use of metabolic energy. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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passive sensitization passive smoke passive smoking passive stretching passive symptom passive transfer passive transfer test passive transport passive tremor passive volition passive-aggressive behavior passive-aggressive personality passive-aggressive personality disorder passive-dependent personality passivism |
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