10/28/13

1. W.U. Are Michelle's red blood cells in a hypertonic, hypotonic or isotonic solution?
2. Plasmolyze the chargers! A lab using anacharis plant cells.

H.W. Answer the following questions regarding today's Anacharis lab:

Analysis:

1. For the cell that was in distilled water, describe how osmosis occurred. Describe the movement of water by discussing the solute concentration of the inside of the cell as compared to the outside environment. Be sure to use the terms: hypotonic, diffusion, turgid. 
2. For the cell that was in salt water, describe how osmosis occurred. Describe the movement of water by discussing the solute concentration of the inside of the cell as compared to the outside environment. Be sure to use the terms: hypertonic, diffusion, plasmolysis. 
3. Why do plant cells thrive (live best) in hypotonic environments? 
4. Why do plants die along roads that are salted during the winter time? 

Need help understanding today's lab: check out these animations
http://www.kscience.co.uk/animations/plasmolysis.htm
http://www.cengage.com/biology/discipline_content/animations/plasmolysis.html

TOMORROW I WILL COLLECT THE FOLLOWING ITEMS

• Fun with cell models lab (for those of you that didn't turn this in on Friday)