2. Add peripheral proteins to your “Fluid Mosaic Structure”
Peripheral proteins are located within ONE half of the bilayer (don’t penetrate all the way through) – can be on both sides of bilayer
General Function: recognition and communication

3. Fluid-Mosaic Model
Bubbles as Cell Membranes:

4. Integral or peripheral proteins?

5. What does it mean for a plasma membrane to be semi-permeable
What does it mean for a plasma membrane to be semi-permeable? Why is selective permeability important for cells/organisms?

6. What types of molecules and ions are membranes MOST permeable to?

7. How do molecules actually cross the membrane. (I. E
How do molecules actually cross the membrane? (I.E. How are molecules transported in and out of cells?)

8. 2 Categories of Transport
ATP = Adenosine Triphosphate
Form of energy used in organisms

9. Types of Passive Transport: Diffusion & Osmosis

10. Diffusion & Osmosis: Both involve the movement of substances
Diffusion & Osmosis: Both involve the movement of substances. Both involve movement across a concentration gradient.

11. What is osmosis?
Animation :

12. What is diffusion?

13. Facilitated diffusion is the passive net movement of particles, facilitated by channel proteins (also called carrier proteins).
Carrier/channel proteins are specific to their molecules.

14. Active vs. Passive Transport Across Membranes

15. Hypertonic vs. Hypotonic vs. Isotonic Solutions
“hyper” = over “hypo” = below “iso” = same
A hypertonic solution is a solution with a HIGHER concentration of solutes OUTSIDE of the cell, compared to inside of the cell.
A hypotonic solution is a solution with a LOWER concentration of solutes OUTSIDE the cell.
An Isotonic solution is a solution with the same concentration of solutes as the inside of the cell.

16. What direction would water move in relation to your cells
What direction would water move in relation to your cells? (AKA What direction would osmosis occur in?)