Chapter 2 / 5 short lessons
Movement of substances
Predict diffusion and osmosis, explain changes in cells and make sense of tissue investigations.
G2 Combined Biology / K224 / K225 / 2027 syllabus
What do you think?
A potato piece gains mass in a dilute solution. What entered its cells?
Lessons
0 of 5 marked as readDiffusion
Predict the net movement of particles from their concentration gradient.
About 4 minOsmosis
Predict the net movement of water using water potential and membrane permeability.
About 4 minOsmosis in plant and animal cells
Link water movement to changes in plant and animal cells.
About 5 minInvestigating osmosis
Calculate percentage mass change, interpret the evidence and plan a fair comparison.
About 6 minDescribe a trend and calculate a percentage change
Describe a trend with quoted figures and units, calculate percentage change to 3 significant figures with its sign, and deal with an anomalous result.
About 7 minWhat you will be able to do
- Use gradients to predict net movement.
- Explain gas exchange and nutrient uptake by diffusion.
- Explain and investigate osmosis in plant and animal tissues.
Spaced review
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