Diffusion, osmosis, active transport, SA:V ratio and transport proteins

What this note covers

1. Selective permeability depends on the substance and membrane
2. Diffusion and facilitated diffusion are passive processes
3. Osmosis concerns water movement through a selective barrier
4. Active transport maintains gradients through energy coupling
5. Vesicular transport moves material by membrane rearrangement
6. Surface area, volume and distance constrain exchange
7. Interpreting an osmosis investigation using percentage mass change
8. Combining surface-area reasoning with evidence for active transport

8 sections · 10 key terms & formulas · 6 common mistakes