Absorption Barrier 1
Absorption Barrier 1 : Medicine. (a) Any of the exchange barriers of the body that allow differential diffusion of various substances across a boundary. Examples of absorption barriers are the skin, lung tissue, and gastrointestinal tract wall. [USEPA, 1992: GL for Exposure Assessment][USEPA, 1992a: Dermal Exposure Assessment]; (b) Any of the exchange sites of the body that permit uptake of various substances at different rates (e.g., skin, lung tissue, and gastrointestinal tract wall) [USEPA, 1997a: EPA Terms of Environment]
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