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Facilitated diffusion
Definition:
Facilitated diffusion (or facilitated transport) is a form of passive transport across biological membranes and refers to carrier-mediated transport of molecules/ions down a concentration gradient. Facilitated transport is mediated by facilitative transporters (also referred to as uniporters).See also:
Facilitated DiffusionFlux
Definition:
The rate of movement of a substance across an interface. The interface could be the plasma membrane (separating the intracellular or extracellular fluid compartments), an epithelial sheet separating two compartments, or where two solutions of different composition meet.Flux is reported as a rate. It is the amount of substance that moves across a given interface per unit time.
Related glossary terms/phrases:
InfluxEfflux
Unidirectional flux
Net flux
Posted: Monday, January 24, 2011
Last updated: Wednesday, March 12, 2025
Last updated: Wednesday, March 12, 2025
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