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Membrane transport system in cystic fibrosis

Burton Altura

Barriers that exhibit selective permeability properties surround cells. The cells establish the electrical potential between the interior and outside of the cell, as well as many other vital homeostatic activities, through the operation of these membranes. Solute transport through biological membranes is facilitated by four mechanisms or clusters of mechanisms. Diffusion, carrier mediated transport (including assisted diffusion and active transport), osmosis, and endocytosis–exocytosis are the mechanisms involved.