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GCSE Biology Paper 1 (9-1 Exams)

Water Molecules Osmosis Pass Ways Membrane Osmosis Due

In osmosis, water molecules move randomly in both directions across the membrane, but a steady net flow occurs into the region with fewer water molecules, leading to dilution of the more concentrated solution.

During osmosis, water molecules move randomly in both directions across the membrane, but there is a net flow into the area with fewer water molecules, thus diluting the stronger solution.

Front What happens for the water molecules during osmosis?
Back
  • Water molecules pass both ways through the membrane during osmosis due to them moving randomly all the time
  • Because there are more water molecules on one side than on the other, there's a steady net flow of water into the region with fewer water molecules
  • This means the strong solution gets more dilute

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