Membranes are partially permeable because the hydrophobic core repels ions and polar molecules, while non-polar and small polar molecules can diffuse through.
Membranes are partially permeable because the hydrophobic core repels ions and polar molecules, while non-polar and small polar molecules can diffuse through.
| Front | Why are membranes partially permeable 2.1.5(c) |
|---|---|
| Back | - particles have to pass phospholipid bilayer - non-polar molecules(e.g O2) diffuse freely - hydrophobic Core repels ions so they cant easily pass - polar molecules(e.g H2O) diffuse at slow rate (smaller molecules diffuse faster) |
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