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Osmosis

 

 

Osmosis – diffusion of water molecules

Osmosis is the diffusion of molecules from a high to a low concentration across a partially permeable membrane. It is a special case of diffusion, the diffusion of water.

 

Partially permeable – only lets in certain substances (cell membrane)

 

How are root hair cells adapted to take up water by osmosis?

  • Have long extensions that increase surface area
  • Large surface area where osmosis can take place