(I) The document discusses different types of transport across cell membranes, including diffusion, facilitated diffusion, active transport, and vesicular transport. (II) It also discusses concepts like the Donnan effect, which describes how a nondiffusible ion on one side of a membrane affects the distribution of diffusible ions. (III) The Gibbs-Donnan equilibrium establishes that at equilibrium, the concentration ratios of diffusible ions will be equal across a membrane permeable to some ions but not others.

1. Body fluid & cell membrane Nermeen Bastawy Physiology Department Faculty of Medicine Cairo University

2. 75 % 60%

3. 40 % 20% ISF IVF 15% 5% plasma

5. Differences between ICF & ECF 28 10 HCO3 - 300 300 Osmolarity mOsm/l 4.5 155 K + 145 10 Na + Plasma ICF Cations mmol/l

9. CELL MEMBRANNE Flexibility & Selective permeability Immunity & cell adhesion

11. Receptors & channel

14. Cells connections & CAMs Connexon

17. Simple Diffusion Dye in water Diffusion Equilibrium

18. Diffusion Cell membrane

19. Natural Kinetic E.

21. Do you think you understand diffusion? + + + + + +

23. Conformational changes of carrier ptn

25. Osmosis and Osmotic Pressure OP

28. Active Transport Simple diffusion facilitated

29. Types of active transport 1ry 2ry

30. Do you think you understand active transport? Na + K + E 1ry

36. Do you think you understand vesicular transport?