1. Structure Function Activity
Plasma Membrane
Structure
Function
Activity

2. Plasma Membrane Phospholipids Membrane proteins Fluid Mosaic Model
Basic molecular component of membrane
Must be fluid
Membrane proteins
Fluid Mosaic Model

3. Plasma Membrane Phospholipid bilayer
Formed by association of hydrophobic tails
Polar (hydrophillic) groups form inside and outside of membrane

4. Plasma Membrane Membrane Proteins Proteins are integral or peripheral
Proteins involved in plasma membrane functions

5. Plasma Membrane Fluid Mosaic Model Membrane must be fluid to function
Components are free (to a degree) to move across surface

6. Plasma Membrane Functions Boundary between inside and outside
Recognition
Energy (respiration and photosynthesis)
Selective permeability of materials
Diffusion
Active transport
Bulk transport

7. Plasma Membrane

8. Plasma Membrane Diffusion Processes
Simple Diffusion – movement of small uncharged molecules
Osmosis – special case of diffusion; diffusion of water in response to solute concentration
Facilitated Diffusion – diffusion using a channel protein

9. Plasma Membrane
Diffusion – the movement of molecules from area of high concentration to low concentration

10. Plasma Membrane Osmosis Isotonic
Solute concentration same on both sides of plasma membrane

11. Plasma Membrane Hypotonic Hypo- below
Solute concentration less outside cell than inside cell

12. Plasma Membrane Hypertonic Hyper- above
Solute concentration greater outside cell than inside

13. Plasma Membrane Facilitated Diffusion
Diffusion that occurs through use of a channel protein

14. Plasma Membrane Active Transport
Movement against energy concentration gradient
Requires energy; usually in form of ATP

15. Plasma Membrane Bulk transport Eukaryotic cells only Endocytosis
Pinocytosis
Phagocytosis
Exocytosis & secretory processes