Copy right of Mohammed Kaleem. It is very good and awesome presentation.

2. Plasma Membrane Structure and Function
Transport mechanisms

6. Plasma Membrane
Phospholipid

8. 8
FluidFluid- phospholipids and proteins can move around freely
within the layer, like it’s a liquid.
MosaicMosaic- pattern produced by the scattered protein molecules
when the membrane is viewed from above.
Fluid Mosaic Model

11. A) Carrier Protein alternates between two
conformations, so that the solute-binding site is
sequentially accessible on one side of the
bilayer and then on the other.
B) Channel Protein forms a water-filled pore
across the bilayer through which specific
solutes can diffuse.

12. Protein Channels
HIGH
LOW

15. Differentially Permeable

17. Types of Plasma membrane transport

18. Factors affecting transport: Cell Membrane

20. Movement across the cell membrane

21. Factors affecting transport: Electrical force

22. Factors affecting the rate of transport

23. inside cell
outside cell
waste
lipid
sat
sugar aa H2O

24. Types of Transport Proteins
Types
Facilitated transport--passive
Active transport—requires energy

25. Cell Membrane Channels
inside cell
outside cell

26. Type of transport and mechanisms

27. Osmosis

29. Isotonic Solution
No net movement of
H2O (equal amounts
entering & leaving)
Hypotonic
Solution
Cytolysis
Hypertonic
Solution
Plasmolysis

30. Diffusion

31. inside cell
outside cell
lipid
inside cell
outside cell
H2O
simple diffusion facilitated diffusion
H2O
protein channel

35. •ATP (energy) is needed  pump
•Moves materials from Low to High
concentration
•Against concentration gradient

36. Example-1 ATPase pumps

38. Endocytosis

39. 2. Phagocytosis (cell eating): large particles, (visible
with light microscope) are invaginated into the cell (ie:
white blood cells ‘eat’ bacteria

42. Phagocytosis

43. Exocytosis