EVERYDAY SCIENCE

Detailed explanation-1: -Facilitated diffusion requires protein channels to transport molecules across a membrane but does not require a concentrantion gradient.

Detailed explanation-2: -Facilitated diffusion does not require high energy molecules such as ATP. This type of diffusion uses channel proteins and carrier proteins to transport molecules across the plasma membrane. Facilitated diffusion involves the movement of molecules from areas of higher concentration to areas of lower concentration.

Detailed explanation-3: -Three transport processes that do not require energy are; diffusion, osmosis and facilitated diffusion.

Detailed explanation-4: -area with lower concentration. The difference between the concentrations is called the “concentration gradient”. Diffusion goes down the gradient until an equilibrium is reached.

Detailed explanation-5: -Passive transport does not require energy input. An example of passive transport is diffusion, the movement of molecules from an area of high concentration to an area of low concentration. Carrier proteins and channel proteins are involved in facilitated diffusion.