NEET BIOLOGY

Detailed explanation-1: -Diffusion stops when the concentration is evenly spread out-true or false? 100% definitely true.

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

Detailed explanation-4: -Diffusion takes place as long as there is a difference between the concentrations of a substance across a barrier. However, diffusion stops, when the concentrations of the substance on either side of the barrier become equal. The permeability of a membrane affects the rate of diffusion.

Detailed explanation-5: -Because diffusion depends upon random particle movements, substances diffuse across membranes without requiring the cell to use energy. Even when equilibrium is reached, particles of a solution will continue to move across the membrane in both directions.