๐ผ Hypertonic Solution
Higher solute concentration than the cell
Effect: Water moves OUT of cell
Example: 1% salt solution vs potato cells
๐ฝ Hypotonic Solution
Lower solute concentration than the cell
Effect: Water moves INTO cell
Example: Distilled water vs potato cells
โก๏ธ Isotonic Solution
Same solute concentration as the cell
Effect: No net water movement
Example: ~0.5% salt solution vs potato cells
This definitions covers Understanding Concentration Terms within Cell Transport for GCSE Biology. Diffusion, osmosis, active transport, factors affecting transport, surface area to volume ratio, and practical investigations It is section 9 of 19 in this topic. Make sure you can use the exact wording confidently, because definition marks are often lost through vague language.
Practice questions for Cell Transport
Which statement best describes diffusion?
Explain how osmosis causes a plant cell to become plasmolysed when placed in a concentrated sugar solution.