Relacionar Columnas Types of DiffusionVersión en línea Distinguish between simple diffusion and facilitated diffusion. por Francheli Bautista 1 2 3 Diffusion 4 5 6 Cell Membrane Is the movement of substances from an area of high concentration to an area of low concentration A transport protein that can change shape to move materials from one side of the membrane to the other. Is the movement of small molecules through a cell membrane without using the channels formed by integral membrane protein. Allows substances to move into the cell and some are allowed out of the cell. A type of transport protein, acts like a pore in the membrane that lets water molecules or small ions through quickly. Molecules diffuse across the cell membrane with assistance from membrane proteins, such as channels and carriers.