passive transport

passive transport   Dan active transport

Passive transport does not require energy down concentration gradients Often, substances have to be moved from a low to a high concentration

Transport processes in which particles follow a gradient—typically a concentration , pressure or electric potential (electrical All forms of diffusion are passive transport In facilitated diffusion, molecules move down their concentration gradients

welcome to open365 Passive transport: membrane channels The sodium-potassium pump sets the membrane potential of the neuron by keeping the concentrations of Na+ and K+ at The simplest forms of transport across a membrane are passive Passive transport does not require the cell to expend any energy and involves a substance