1. Do Now 1. Which type of transport requires ATP?
2. What are the three types of passive transport? (you’ll find them in the article)
3. Which way does the concentration gradient move in passive transport? (High to low or low to high)
Today’s Topic: Osmosis

2. Set your desk up and silently complete the DO NOW.
Binder
Handout
(Seat)
HW: 3.5
Set your desk up and silently complete the DO NOW.
Today’s EQ: How does the concentration of molecules on either side of a membrane affect movement?
Today’s objective: we will be able to identify osmosis in order to explain the difference between hypotonic, hypertonic, and isotonic solutions

3. Agenda Do Now & Review Updated DATA Vocabulary INM: osmosis
EOC Practice

4. Let’s Look At Some DATA…
77%

5. Vocabulary Word #1 Solute  write the word in your first column
When I add the solute sugar to water it dissolves in solution  make a second column
Actual definition: substance that is dissolved  write in your third column
Create your own sentence  last column

6. Vocabulary Word #2 Solvent  add this to your first column
Make a predication: When I add sugar to a solvent such as water it dissolves in the solution add this to your second column
Actual Definition: a substance that dissolves another add this to your third column
Create your own sentence  add this to your last column

7. Vocabulary Word #3 Solution  add this word to your first column
Make a prediction: when I added sugar and water together they mixed and became a solution  add this to your second column
Actual Definition: is a mixture of solute and solvent  add this to your third column
Create your own sentence  add this to your last column

8. Terms to Know Solute- substance that is dissolved.
Solvent - does the dissolving. 
Solution- mixture of the solute and solvent.

9. Osmosis Diffusion of water molecules
Water will flow into an area where there is less water
High to low concentration (no ATP needed)

10. Osmosis Cell membrane semipermeable. DILUTE SOLUTION
CONCENTRATED SOLUTION
Sugar molecule
VERY Low conc. of water molecules.
Outside cell
Inside cell
VERY High conc. of water molecules.

11. Osmosis Cell membrane semipermeable.
Low conc. of water molecules. High water potential.
OSMOSIS
High conc. of water molecules. High water potential.
Outside cell
Inside cell

12. Osmosis Cell membrane partially permeable. OSMOSIS Outside cell
Inside cell
EQUILIBRIUM. Equal water concentration on each side. Equal water potential has been reached. There is no net movement of water

13. Practice
72% Water and 28% solute
72% Water
28% Solute

14. Practice
15% Water and 85% solute
40% Water
60% Solute

15. Types of Solutions
Water moves into or out of a cell depending on the type of solution
Three possible solutions: Hypotonic, Hypertonic, and Isotonic

16. Prefixes
Hypo: low
Hyper: high
Iso: equal

17. Hypotonic Solutions
Low water concentration (high solute) inside the cell
High water concentration (low solute) outside the cell
Water flows into cell
Causes the cell to swell or burst

18. Cells in Hypotonic solution

19. Hypertonic Solutions
High water concentration (low solute) inside the cell
Low water concentration (high solute) outside the cell
Water flows out of cell
Causes cell to shrink

20. Cells in Hypertonic solution

21. Isotonic Solutions
Same water & solute concentration inside & outside of cell
No net water flow
Cell does not change in size

22. Cells in Isotonic solution

23. Hypotonic Cell will swell Practice SOLUTION: 75% water, 25% solute

24. Hypertonic cell will shrink Practice SOLUTION: 20% water, 80% solute

25. Isotonic cell stays the same Practice SOLUTION: 34% water, 66% solute

26. : Molecules and ions are constantly being moved across the cell membranes. A student was asked to determine if the illustration shows active or passive transport of potassium (K+) and sodium (Na+).
Active transport is occurring for both potassium and sodium

27. The cell membrane regulates the movement of molecules in and out of the cell. Which best describes the cellular environment that initiates the passive transport of molecules across a cell membrane?
a. A concentration gradient across the cell membrane
b. A concentration gradient that is equal on both sides of the cell membrane
c. The availability of ATP to move molecules against the concentration gradient
d. The availability of proteins to direct the movement of molecules against the concentration gradient

28. A cell is placed in a beaker containing pure water
A cell is placed in a beaker containing pure water. Which statement best explains the changes that will be seen in the cell?
a. The cell will increase in volume as water enters the cell
b. The cell will decrease in volume as water leaves the cell
c. The cell will decrease in volume as water and salt leave the cell
d. The cell will increase in volume as water and salt enter the cell