Biology B3 - Osmosis

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Osmosis is a special case of diffusion 

Define: Osmosis is the movement of water molecules across a partially permeable membrane from a reigon of high water concentration to a region of low water concentration 

- a 'partially permeable' membrane is one with very small holes in it. So only small moleclues like water can pass through. 

- The water molecules actually pass both ways, through the membrane during osmosis.. 

-Because there are more water molecules on one side,  theres a steady flow of water into the reigon with fewer water molecules. 

-This means the strong sugar solution…


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