1. Introduction to Biology BELLWORK
Answer the following questions (answers only):
Name the organelle that supports the cell and provides shape?
Name the organelle that synthesizes (makes) proteins?
Name the powerhouse of the cell?
Where are old cell organelles broken down and digested?
Which organelle controls entry in and out of the cell?

2. CHAMPS C- Conversation- NO H- Help- Raise your hand
A- Activity- We are taking notes
M- No movement
P- Sit quietly, eyes on paper, teacher or board. Writing
S- Signal

3. Cell Transport The Cell Membrane:
Molecules move in and out of the cell via Active & Passive Transport.

4. The Cell Membrane Gatekeeper
Regulates what comes in and out of the cell
Main components: proteins and phospholipids

5. Cell Wall Found only in plant cells and bacteria cells
Main function is support

6. Solutions
Mixtures of substances
Ex. Salt + water; sugar + water

7. Solvent vs. Solute

8. Concentration Gradient

9. Diffusion
The movement of molecules from an area of high concentration to an area of low concentration
Molecules tend to “spread out”
Requires no energy

10. Equilibrium When molecules are evenly spread throughout a space
Movie starring Christian Bale called “Equilibrium”

11. Osmosis The diffusion of water across a membrane
The cell membrane is selectively permeable
Watch the animation

12. Rule for Osmosis
If the area outside the cell has more salt – then water will be sucked out of the cell

13. U - Tubes

14. Cells In Different Solutions
"ISO" means the same

15. Hypo = less
Cell may burst, or organelles called “contractile vacuoles” remove excess water

16. Hyper = more Cell will shrink or die, plants wilt
Why is it dangerous to drink sea water?
Why does pouring salt on a slug kill it?

17. Passive Transport Requires no energy Diffusion & Osmosis
Facilitated Diffusion – carrier proteins “help” molecules across the membrane

18. 1.  Why is the water moving toward the left side of the beaker? 
2.  Which side of the beaker is hypertonic?
3.  What is the solute?  

19. ACTIVE TRANSPORT Requires the cell to use energy
Proteins or Pumps found in the membrane move materials across

20. Endocytosis Taking “in” large molecules by the cell
Phagocytosis = “phood”, taking in food particles
Pinocytosis = liquid substances

21. EXOCYTOSIS Removing large particles (waste) from the cell
Stuff “exits” the cell
Watch video at d9-1ae32c6125d2/Chapter-6--- Endocytosis-and-Exocytosis
Or McGraw Hill Site

22. Be sure to know the following terms for the test!
Diffusion
Osmosis
Selectively permeable
Equilibrium
Solution
Facilitated Diffusion
Hypertonic
Hypotonic
Isotonic
Passive Transport

23. Active Transport
Endocytosis
Phagocytosis
Pinocytosis
Exocytosis