Simple and Facilitated Diffusion AQA A Level Biology - Transport Across Membranes

PowerPoint for a complete lesson on transport across membranes, focussing on simple and facilitated diffusion for AQA A Level Biology.
3.2.3 Transport across cell membranes
Movement across membranes occurs by:
• simple diffusion (involving limitations imposed by the nature
of the phospholipid bilayer)
• facilitated diffusion (involving the roles of carrier proteins and
channel proteins)