Osmosis and Cells in Solution

Here is the site shown in class - check out the movies to review what happens in each situation.

http://www.tvdsb.on.ca/westmin/science/sbi3a1/cells/osmosis.htm

Blood Cells in a Hypertonic Solution: (via YouTube)


Blood Cells in an Isotonic Solution: (via YouTube)


Blood Cells in a Hypotonic Solution: (via YouTube, Fast forward to 1:16)

Bacteria on Cells

Here is a sample image from one of the mouthwash-rinsed mouths:


It was difficult to find cells in some of the samples (perhaps another variable in the experiment?) but those that were present looked a lot like the one above.

Remember to answer all discussion questions and read ahead on diffusion in the textbook.

Cell Organelle Review

Hi everyone,

Check this link for a summary of ALL of the cell organelles.

As promised for the honors class, the solutions to the practice test can be found below:

1. e 14. b
2. h 15. d
3. b 16. b
4. c 17. d
5. d 18. a
6. i 19. c
7. f 20. b
8. a 21. d
9. g 22. c
10. d 23. a
11. a 24. b
12. c 25. d
13. c

Also, as a quick check of who is using the site, the first ten people to email/text/call Mr. Weinberg will get a small treat the next day!