A lesson on cell membranes and how substances move across them. It explains membrane structure and the fluid mosaic model, then compares diffusion, osmosis, facilitated diffusion and active transport, with a set of practical activities using dialysis tubing, beetroot and an osmometer.
What this presentation covers
- functions of membranes
- the phospholipid bilayer and fluid mosaic model
- the blood brain barrier
- solutes, solvents and solutions
- diffusion, osmosis, facilitated diffusion and active transport
- hypotonic, hypertonic and isotonic solutions
- plant and animal cells in different solutions
- membrane practicals with tests for starch, chloride and sulfate ions
Level: GCSE / A Level
Slides: 22
Format: PowerPoint (.pptx)