Active and passive transport PPT

passive transport  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 Summary · Passive transport does not require energy input · An example of passive transport is diffusion, the movement of molecules from an

All forms of diffusion are passive transport In facilitated diffusion, molecules move down their concentration gradients  Some membrane proteins help communicate with other cells B Other proteins do active transport Page 57 PASSIVE TRANSPORT

Other than simple and facilitated diffusion, osmosis and filtration are two other techniques that work on the principle of passive transport They are also Transport Without Energy Expenditure By The Cell Passive transport occurs when substances cross the plasma membrane without any input of energy from the cell