1. Do Now! Copy vocabulary words into your notebooks: cell membrane concentration diffusion osmosis equilibrium active transport passive transport

2. Cell Membrane Controls what enters and exits the cell Lipid bilayer
Hydrophilic heads (water loving) are on the outsides of the membrane
Hydrophobic tails (water fearing) are in the inside of the membrane
Have protein channels embedded through out the membrane that act like doors to let large molecules in and out

5. Concentration Not what this means in science This is what we want
The amount of a substance in an area

6. DIFFUSION: the movement of molecules from an area of high to low concentration – DOES NOT REQUIRE ENERGY

7. Passive Transport Does osmosis or diffusion require energy?
No, molecules move along a concentration gradient.

8. Facilitated Diffusion
Facilitated Diffusion- molecules move down a concentration gradient with the aid of special proteins.

9. Osmosis
The movement of water across a semipermeable membrane like the cell membrane.
Water wants to balance out each side of the membrane
Equilibrium – everything is balanced

10. 3 types of solutions Iso – equal Hypo – below Hyper - above
Remember water wants to equal everything out so it will move in the direction there is less water and more solutes.

11. Solutions

12. Solutions in Plants

13. Active Transport Requires Energy.
ATP (form of energy made by mitochondria).
Moves against the concentration gradient.

14. Endocytosis
Transporting material into a cell by the in folding of a membrane.

15. 2 Types of Endocytosis
Phagocytosis- Solid particles are ingested into the cell.
Pinocytosis – liquids taken into the cell.

16. Exocytosis
Moves materials out of the cell

17. Summary What is Diffusion? What is Osmosis? What is Active Transport?
What is Passive Transport?