Osmosis
What Osmosis means in Biology A-Level, as defined for AQA, OCR, Pearson Edexcel.
Definitions of Osmosis
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Reference: OCR
The movement of water across a partially permeable membrane from a region of higher water potential to a region of lower water potential.
Movement of water down a water potential gradient, from the soil solution with higher water potential into root hair cell contents.
Movement of water across a partially permeable membrane from a higher to a lower water potential.
The net movement of water molecules from a region of higher water potential to a region of lower water potential through a partially permeable membrane.
The net movement of water molecules from a region of higher water potential to a region of lower water potential, across a partially permeable membrane.
Topics that use Osmosis
- Transport across cell membranes (AQA A-Level)
- Biological membranes (OCR A-Level)
- Transport in plants (OCR A-Level)
- Biological Molecules (Pearson Edexcel A-Level)
- Modern Genetics (Pearson Edexcel A-Level)
Related terms
Using Osmosis in the exam
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