Glucose uptake

Glucose uptake is the process by which glucose molecules are transported from the bloodstream into cells through specialized membrane proteins called glucose transporters, primarily via facilitated diffusion or active transport mechanisms:

Facilitated Diffusion is a passive process that relies on carrier proteins to transport glucose down a concentration gradient.

Secondary Active Transport is transport of a solute in the direction of increasing electrochemical potential via the facilitated diffusion of a second solute (usually an ion, in this case Na⁺) in the direction of decreasing electrochemical potential. This gradient is established via primary active transport of Na⁺ ions (a process which requires ATP).