passive diffusion


fa·cil·i·tat·ed trans·port

the protein-mediated transport of a compound across a biomembrane that is not ion-driven; a saturable transport system. Synonym(s): passive transport

pas·sive dif·fu·sion

(pas'iv di-fyū'zhŭn) Passage of molecules across a semipermeable membrane without expenditure of energy.

pas·sive dif·fu·sion

(pas'iv di-fyū'zhŭn) Passage of molecules across a semipermeable membrane without expenditure of energy.