1. Benjamin Franklin on the purpose of daylight savings time
11/27/2018
Title: Biology 11/2/06
Objectives:
To assess learning about cells and their organelles and begin learning about movement of molecules across the cell membrane
Class Topics
Chapter 3 Test
Notes – Chapter 4
"183 nights between 20 March and 20 September times 7 hours per night of candle usage equals 1,281 hours for a half year of candle usage. Multiplying by 100,000 families gives 128,100,000 hours by candlelight. Each candle requires half a pound of tallow and wax, thus a total of 64,050,000 pounds. At a price of thirty sols per pounds of tallow and wax (two hundred sols make one livre tournois), the total sum comes to 96,075,000 livre tournois.”
Benjamin Franklin on the purpose of daylight savings time
Tuesday, November 27, :05 AM

2. 11/27/2018
Corrections
Starting at the beginning of next week there will be no more corrections for a two week time period.
Students are abusing the privilege and not taking homework seriously.
Too many DNF and plagiarism
Good luck!

3. Class Assignments Chapter 3 Test 11/2/06
11/27/2018
Class Assignments
What
By When
Chapter 3 Test 11/2/06
All Chapter 3 corrections 11/6/06
Read /6/06
W.S. 4.1 (DR/Quiz) 11/6/06
Due this class period
Due next class period
Due in the future

4. Grade Sheet 1A – SR p. 61 - 5 pts Measurement W.S. – 10 pts
11/27/2018
Grade Sheet
1A – SR p pts
Measurement W.S. – 10 pts
3A SR p. 42 – 6 pts
4A – SR p. 47 – 5 pts
2A – Measurement W.S. – 10 pts

5. Posttest Activities Hand in test Pick up W.S. 4.1 Correct homework
11/27/2018
Posttest Activities
Hand in test
Pick up W.S. 4.1
Correct homework
Take advantage of this while you still can!
Read 73-80

6. Passive Transport DIFFUSION
11/27/2018
Passive Transport
The movement of molecules through a membrane without any energy from the cell.
DIFFUSION
Molecules will move from areas of high concentration to areas of low concentration
Equilibrium – Concentration is equal throughout a space.
End of diffusion

7. From: http://epswww.unm.edu/coursinf/eps462/page4.htm
11/27/2018
From:

8. Diffusion in cells Into or out of a cell
11/27/2018
Diffusion in cells
Into or out of a cell
Through lipid bilayer
This is how water, oxygen, and carbon dioxide pass through the cell membrane
Go with the concentration gradient
think hill

9. Selectively permeable membranes
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Selectively permeable membranes
Allows small polar or nonpolar particles through
larger or polar particles do not pass

10. Where are the polar and nonpolar areas?
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Where are the polar and nonpolar areas?

11. Osmosis The diffusion of water (passive transport)
11/27/2018
Osmosis
The diffusion of water (passive transport)
3 types of solutions
hypotonic
hypertonic
isotonic

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13. Hypotonic high concentration of water outside of the cell
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Hypotonic
high concentration of water outside of the cell
Movement of water into the cell
Cell swells
Distilled water
Pond water for most organisms
must have contractile vacuole
Cytolysis – bursting of cells

14. Hypertonic High concentration of water inside the cell
11/27/2018
Hypertonic
High concentration of water inside the cell
Water moves out of the cell
Cell shrinks (plasmolysis)
Salt water

15. Isotonic Same concentration inside and outside the cell
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Isotonic
Same concentration inside and outside the cell
No net movement of water
no effect on the cell
Blood plasma
Why?

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18. Osmotic Pressure Plants, fungus, bacteria Animals freshwater protists
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Osmotic Pressure
Plants, fungus, bacteria
Turgor pressure (on cell wall)
Animals
Blood plasma (isotonic)
freshwater protists
Contractile vacuole – sump pump