1. Do Now: How did the concept of passive transport apply to our:
Starch and glucose lab?
Red Onion lab?

2. Announcements Test have been moved to Tuesday Lab Rewrites due Monday
End of Term – Oct 30
Please see me if you are missing any work!1!

3. Cell Labs Review

4. Will it cross the membrane?
Tables
Complete Prediction Table (must include a why)
Molecule
Molecular Formula
Will it cross the membrane?
Why or why not?
Starch
polysaccharide
Glucose
C6H12O6
Iodine
I3K
Water
H2O

5. Tables Complete Prediction Table (must include a why)
Chemical Test Results
Water
Starch
Glucose

6. Starch solution before being added to iodine

7. Lugol’s solution (Iodine) – test for starch
Water and Iodine
Glucose and Iodine
Starch and Iodine

8. Tables Chemical Test Results Indicator Solution Used Distilled Water
Starch
Glucose
Blue colored Benedicts
Glucose Indicator
Amber-colored Lugol’s Iodine Solution
Starch indicator

9. Summary of Results – Data Table
Video of Gluocose/Starch Dialysis Tubing
What was present in the semi-permeable bag at the beginning of the experiment?
What was present inside the beaker at the beginning of the experiment?
What was present at the end in the beaker?

10. Osmosis Diffusion Lab Question 1: Question 2:
What is moving into bag?
What is moving out of bag?
Question 2:
Provide evidence – DATA!!!
What data did you collect?
Be specific
Question 3: Explain how you know what moved into and out of bag. Use your knowledge of diffusion and osmosis to explain your results.
Pore size (size of holes in membrane)
Concentration (low, high) – does not have to be specific numbers.

11. Red Onion Lab Sketches should have Detailed pictures
Total Magnification (10X eyepiece, 10X or 40 X objective ) – calculate magnification
Description (colors, size, shape, structures)

12. Red Onion Lab: What process is occurring?
Distilled Water
Sketch A, C
Salt Water
Sketch B

13. Questions
1 &2.
Add arrows and concentrations (high/low) to Sketches B and C
State whether the cell is in a hypertonic, hypotonic, or isotonic solution.
Use your class notes and textbook to make that determination.

14. Describe why osmosis is a form of diffusion.