AP BIOLOGY

Detailed explanation-1: -Eventually, the concentration of the molecules on each side of the cell membrane will be the same and particles will be going back and forth through the membrane at the same rate. At that point, equilibrium is reached.

Detailed explanation-2: -If the substance can cross the cell membrane, its particles will tend to move toward the area where it is less concentrated until equilibrium is reached. At that point, the concentration of the substance on both sides of the cell membrane will be the same.

Detailed explanation-3: -The end result is an equal concentration, or equilibrium, of molecules on both sides of the membrane. At equilibrium, movement of molecules does not stop. At equilibrium, there is equal movement of materials in both directions.

Detailed explanation-4: -Molecules move from an area of high concentration to an area of lower concentration until an equilibrium is met. The molecules continue to cross the membrane at equilibrium, but at equal rates in both directions.

Detailed explanation-5: -During diffusion, when the concentration of molecules on both sides of a membrane is the same, the molecules will continue to move across the membrane in both directions.