AP BIOLOGY

Detailed explanation-1: -it is the random motion of the molecules that causes them to move from an area of high concentration to an area with a lower concentration. Diffusion will continue until the concentration gradient has been eliminated.

Detailed explanation-2: -Since diffusion moves materials from an area of higher concentration to the lower, it is described as moving solutes “down the concentration gradient.” The end result of diffusion is an equal concentration, or equilibrium, of molecules on both sides of the membrane. At equilibrium, movement of molecules does not stop.

Detailed explanation-3: -Simple diffusion stops when equilibrium is reached. This means that diffusion will only occur while there is an area where the substance is more highly concentrated. Once both sides of the membrane have an equal concentration of the substance, diffusion will stop.

Detailed explanation-4: -Diffusion results from the random motion of molecules by which there is a net flow of matter from a region of high concentration to a region of low concentration. This process can neither be stopped nor reversed.

Detailed explanation-5: -A principle of diffusion is that the molecules move around and will spread evenly throughout the medium if they can.