diffusion in which a substance not soluble by itself in lipids is transported across a selectively permeable membrane by combining with a transporter (carrier) molecule
Passive movement through a membrane involving a specific carrier protein; does not proceed against a concentration gradient. (Contrast with active transport, free diffusion.)
the movement of molecules across a membrane from a region of high concentration to a region of low concentration that is assisted by proteins.
the transport of molecules across a membrane via a carrier protein in the direction of lower concentration.
Diffusion of molecules that cannot pass through the cell membrane independently, but rather through permeable protein channels embedded in the membrane. Facilitated diffusion does not require outside energy. FADH2 A molecule that stores energy for harvest by the electron transport chain.
Mediated transport in which a permease makes possible diffusion of a molecule across a cell membrane in the direction of a concentration gradient; contrast with active transport.
The passive movement of a substance across a cell membrane by means of a protein carrier.
fah-SIL-eh-tay-tid dif-FU-shun Movement of a substance down its concentration gradient with the aid of a carrier protein. 92
the spontaneous passage of molecules and ions, bound to specific carrier proteins, across a biological membrane down their concentration gradients
The passage of materials through the cell's plasma membrane aided by a concentration gradient and a transport protein.
Facilitated diffusion (or facilitated transport) is a process of diffusion, a form of passive transport, where molecules diffuse across membranes, with the assistance of transport proteins.