Biological membranes behave as non-porous polymeric sheets with respect to the diffusion of non-electrolytes.
D002463:Cell Membrane Permeability; D004058:Diffusion; D008567:Membranes, Artificial; D008954:Models, Biological; D008970:Molecular Weight; D011108:Polymers
D008567:Membranes, Artificial; D011108:Polymers