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Diffusion is the net movement of molecules or atoms from a region of high concentration with high chemical potential to a region of low concentration with low chemical potential.
A) Diffusion is a result of the kinetic energy of atoms and molecules. B) Diffusion is driven by concentration gradients. C) Diffusion requires no input of energy into the system. D) Diffusion occurs when particles spread from areas where they are less concentrated to areas where they are more concentrated. E) Diffusion occurs even after equilibrium is reached and no net change is apparent. Answer: D. 12) Diffusion does not require the cell to expend ATP.