Low concentration High concentration In both simple and 隧 facilitated diffusion, ::.: solutes move in the direction predicted Diffusion by the concentration gradient Facilitated diffusion ∴∴ Active transport In active transport, solutes move opposite to the direction predicted by the concentration gradient.In both simple and facilitated diffusion, solutes move in the direction predicted by the concentration gradient. In active transport, solutes move opposite to the direction predicted by the concentration gradient. membrane