PRE-LAB QUESTIONS1. Compare and contrast diffusion and osmosis.
2. Draw a picture of a cell in isotonic, hypotonic, and hypertonic states.
3. Why don’t red blood cells swell or shrink in blood?
4. How do osmotic power plants work?
5. Research the structures that protect plant and animal cells from damage resulting from
osmotic pressure. Write a few paragraphs explaining what they are, how they work, and
where they are located.
Diffusion and Osmosis
EXPERIMENT 4: OSMOSIS – TONICITY AND THE PLANT
CELL
Data Tables
Table 7: Water Displacement per Potato Sample
Potato
Potato Type and
Observations
Initial
Final
Net
Sample Displacement Displacement Displacement
(mL)
(mL)
(mL)
1
1A
1
1B
2
2A
2
2B
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