Passive Transport

Passive Transport passive transport Transport Without Energy Expenditure By The Cell Passive transport occurs when substances cross the plasma membrane without any input of energy from the cell active transport In facilitated transport , also called facilitated diffusion, materials diffuse across the plasma membrane with the help of membrane proteins

active transport Passive transport

passive transport Perhaps the simplest case of passive transport occurs where membrane proteins form channels through the lipid membrane These either involve only one  Passive transport, also known as passive diffusion, is a process by which an ion or molecule passes through a cell wall via a concentration