1. Dynamic Cells Chapter 8 p. 288 - 317
Membrane Properties
Transport Across Cell Membranes
Cell Size and Functions

2. Membrane Properties pg. 290 - 296
Membrane Structure
Membrane Function

3. http://www.teachersdomain.org/asset/oer 08_vid_bassler/
Bacterial membrane and communication

4. Cell membranes are phospholipid bilayers

5. https://www.youtube.com/watch?v=yAXn YcUjn5k
TedEd Insights into cell membranes via dish detergent

6. Cell membranes are phospholipid bilayers

7. What are phospholipids?

8. Phospholipids self assemble into different structures because their hydrophobic and hydrophilic ends repel each other

9. What’s a Phospholipid Bilayer?
2 layers of phospholipids

10. Each layer has:
a hydrophilic phosphate end (hydro = water, philic = loving)
and a hydrophobic lipid tail (phobic = fears, repels)

11. Cell membranes are like mosaics
Lots of phospholipid tiles with protein, carbohydrate chain and cholesterol tiles thrown in!

12. Why the different tiles?

13. Membranes are responsible for an incredible number of things!

14. carbohydrate chains are for cell to cell communication.

15. Proteins are crucial for the transport of substances in and out of the cell

16. Membrane Proteins can be peripheral (on surface) or integral (spans the membrane)

17. Cholesterol maintains proper membrane flexibility, and also is crucial for cell signaling and nerve conduction.

18. Cholesterol is not just a bad guy!

19. Fluid Mosaic Model
Cell membranes are constantly MOVING and CHANGING.

20. Gives cell flexibility, movement RBC membrane
Fluid Mosaic Model
Gives cell flexibility, movement RBC membrane

21. Changes the positions of the proteins, lipids and carbohydrates embedded in the membrane, changing the “mosaic” to meet changing needs

22. https://www.youtube.com/watch?v=Qqsf_ UJcfBc

23. 3 Functions of the Cell Membrane
1. Barrier – keeps “baddies out, cell organelles in
Bacteria pollution resistant bacteria

24. 3 Functions of the Cell Membrane
Organization – membranes surround and package materials in vesicles,
lysosomes endoplasmic reticulum

25. 2. Organization – membranes
2. Organization – membranes organize complex reactions like photosynthesis and cellular respiration

26. 3. Selective Filter – SEMI-PERMEABLE –
3. Selective Filter – SEMI-PERMEABLE – only allows certain substances in or out
Regulated by particle size and by selective transport by membrane proteins

27. https://www.youtube.com/watch?v=GW0l qf4Fqpg&feature=related
Cell membrane receiving info from hormone

28. Clips http://www.youtube.com/watch?v=Rl5EmUQdkuI&featu re=fvwrel
fluid mosaic model
e=related
how a hormone communicates to the cell through the membrane
• r/
Membrane communication in bacteria – antibiotic potential