Water transport

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  • Created by: Rachel
  • Created on: 28-03-13 12:34

How does water move from the ground up to the leaves of a plant?

  • Roots do more than just anchor a plant in the ground - they take up water and mineral salts from the soil
  • The surfac of roots have specialised root hair cell with long thin extensions that reach into the surrounding soil
  • The root hairs provide a large surface area for substances to enter the root

Osmosis and active transport

  • Water enters the root hair cells by osmosis. In this proces, water  moves across a partially permeable membrane (a membrane that only certain substances can pass through) from a region where water in in higher concentration to a region where it is in lower concentation 
  • Roots can absorb nitrate and other mineral ions

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