1. Agenda Bell Ringer (5 minutes)
Introduction: Death by Water (10 minutes)
Notebook Input (10 minutes)
Notebook Output (5 minutes)
Stations (40 minutes)
Independent Practice (10 minutes)
Exit Quiz (10 minutes) 1

2. Bell Ringer (5 mins)
Turn in homework, get out your notebook
Pick up 2 worksheets;
Answer questions 1-4 using the reading

3. What are we learning?
Main Idea: Cell transport= how cells move things in and out
Cell membrane function
Cell membrane structure
Passive transport
Diffusion
Osmosis
Active transport

4. Intro: Death by Water 4

5. Turn-and-Talk What do you think caused Zyrees’s death?
How did drinking too much water cause him to become brain-dead? 5

6. What is the function of the cell membrane?
It is a barrier that controls what enters and leaves the cell. Also called plasma membrane.
Outside
of cell
Inside
(cytoplasm)
Cell
membrane
Proteins
Protein
channel
Lipid bilayer
Carbohydrate
chains

7. The cell membrane is made of phospholipids.
Phospholipid bilayer
The cell membrane is made of phospholipids.
The head is polar and hydrophilic.
Attracted to water
The two long tails are non-polar and hyrdophobic
Repel water
The double layer of phospholipids forms a flexible bi-layer 7

8. The lipid bilayer gives the cell membrane flexibility
Fluid Mosaic Model
The lipid bilayer gives the cell membrane flexibility
There are proteins that are embedded in the lipid bilayer. 8

9. Selective Permeability (Semi-permeability)
Selectively permeable means that only SOME (small, non- polar) things can pass through
Typically, small, non-polar molecules can pass through the phospholipid bilayer, while large, polar molecules cannot. 9

10. Facilitated diffusion
Passive transport allows movement across the cell membrane without using ATP (energy)
3 types:
Diffusion
Osmosis
Facilitated diffusion
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11. What is concentration?
Concentration is the amount of solute dissolved in a solution
Example: 50% alcohol, or 30g/mL salt
Water and molecules naturally move from HIGH to LOW concentrations
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12. During diffusion= particles in a solution move from high to low concentration.
During osmosis= water moves from high concentration to low concentration.
Both do not use energy.
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13. Check For Understanding
Which one has a higher salt concentration?
What is the solute?
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16. Check For Understanding
The blue dots represent salt molecules
Where is the higher concentration, inside or outside?
Where will the water go?
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17. Isotonic solution: concentration of solutes inside and outside of cell are equal
Hypertonic solution: Outside solution has higher concentration of solutes than cell, CELL GETS SMALLER
Hypotonic solution: Outside solution has lower concentration of solutes than cell, CELL GETS BIGGER
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19. High concentration to low concentration. Does not use energy.
Facilitated Diffusion
During facilitated diffusion, membrane proteins make it easy for certain molecules to cross the membrane.
High concentration to low concentration.
Does not use energy.

20. Molecules move from low concentration to high concentration.
Active Transport
During active transport, cells move material against the concentration gradient.
Molecules move from low concentration to high concentration.
Carried out by transport proteins.
Requires ATP.
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21. Think about it
Now that you know about cell transport, go back to the problem of Zyrees’s death by water.
Using what you learned, explained why drinking 4 gallons of water caused Zyrees’s death.
Use the following vocabulary words: concentration, passive transport, cell membrane, osmosis, hypotonic solution.
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22. Gummy Bear Lab -Before Gummy Bear Dimensions: 2 cm height x 1 cm width
*Follow the instructions on your lab handout

23. Ex. % change in Width original= 1 cm New = 3 cm ((2-1)/1) x 100 = 100%

24. Percentage %
Type of Water

25. -GRAPH AND LAB QUESTIONS DUE AT THE END OF CLASS
-HOMEWORK=
Lab Report Write up 3 paragraph conclusion; follow the rubric!
DUE MONDAY
*PROJECT DUE WEDNESDAY

26. Exit Quiz Put everything away You must stay completely quiet
You got this!!!!
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27. Home Learning
Review your notes and work from Unit 1 and Unit 2 in preparation for your Mid-Year evaluation!
STUDY :0