Movement of molecules across cell membranes

ppt showing the 4 ways molecules can move across cell membranes - diffusion, facilitated diffusion, osmosis and active transport. Suitable for year 12 A Level. Includes animations of the methods and explains how different factors affect the rate of movement. Differentiates between passive and active movements. See a demo video at https://youtu.be/m7lqbMB0SGA