1 Cell 80 water Liquid cell is in 95 water Will water move into or out of the cell 2 Beaker 50 water 50 salt Dialysis Tube 40 water 60 salt Will water move into the tube or out of the tube ID: 401603
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Slide1
Warm UP 9/22 (Silent)
1. Cell = 80% water
Liquid cell is in = 95% water
Will water move into or out of the cell?
2. Beaker = 50% water, 50% salt
Dialysis Tube = 40% water, 60% salt
Will water move into the tube or out of the tube?
3. Beaker = 10% water, 90% sugar
Egg = 10% water, 90% other molecules
Will water move into the egg or out of the egg?
4. Beaker = 90 % sugar
Egg = 50% sugar
Will water move into the egg or out of the egg?Slide2
Reminders
Test in one week 9/29
Last day to make up work from 9/17 or before is 9/28 (MONDAY)
Cell Analogies are late, but it is better to be late then get a zero, please turn them in!
No reading quiz next week…but….I will give you a study guide on Thursday
Slide3
Direction of Osmosis
Hypotonic: Lower in concentration of solutes (higher in water)
Hypertonic: Higher in concentration of solutes (lower in water)
Isotonic: Equal in concentration of solutes (equal in water)Slide4
Osmosis Problem PracticeSlide5
1.
Cell _______________________
Environment _____________________
hypotonic
hypertonic
Water leaves the cell and it shrivels or shrinksSlide6
2.
Cell_________________________
Environment _____________________
hypotonic
hypertonic
Water enters the cell and it swellsSlide7
3.
Cell_________________________
Environment _____________________
Water leaves the cell and it shrivels or shrinks
hypotonic
hypertonicSlide8
4.
Cell_________________________
Environment _____________________
isotonic
isotonic
Equal water entering and leaving cell so cell is in homeostasisSlide9
Back to our Messin
with Osmosis experiments
Think back to your experiments.
Answer the following questions:
What item and what liquid did you and your group use?
Which was hypertonic your liquid or your item? (or where they isotonic?)
Which was hypotonic your liquid or your item? (or where they isotonic?)
Where did water move, into or out of your item? Slide10
Osmosis and Diffusion Video
https://www.youtube.com/watch?v=IaZ8MtF3C6MSlide11
Cells and Tonicity
Turgor Pressure
: pressure that water molecules exert against a cell wall
Plasmolysis
: When cells shrink away from the cell walls
Cytolysis
: When cells burst