Unformatted text preview: 4. Selective permeability in membranes • Some substances are allowed to cross membranes more easily then others 5. Passive Transport diffusion • Spontaneous movement of a substance down its concentration gradient 6. Osmosis • Passive transport of water from hypotonic to hypertonic concentration 7. cell balancing water uptake and loss • Cells without wall are isotonic with their environment or have adaptations for osmoregulations. 8. Active Transport • Pumping of solutes against their gradient 9. ion pumps • different typed, chemical gradient and electrical gradient (voltage) 10. Exocytosis and endocytosis • Know what they are and the difference between the two...
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- Spring '09
- Cell-cell recognition, unsaturated hydrocarbon tails, Passive Transport Diffusion, Jack AP Bio