Passive Transport

passive transport  Some membrane proteins help communicate with other cells B Other proteins do active transport Page 57 PASSIVE TRANSPORT  Passive transport

Filtration is another passive process of moving material through a cell membrane While diffusion and osmosis rely on concentration gradients, filtration uses a Facilitated diffusion is a type of passive transport that allows substances to cross membranes with the assistance of special transport proteins

Passive transport: membrane channels The sodium-potassium pump sets the membrane potential of the neuron by keeping the concentrations of Na+ and K+ at Passive transport