Active transport

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  • Created by: n.thomas
  • Created on: 03-01-16 15:41

Active transport

  • process in which dissolved molecules move across a cell membrane
  • from a LOWER concentration to a HIGHER concentration 
  • when particles move against the concentraion gradient an energy input from the cell is required


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sometimes organisms need dissolved molecules from outside the cell

the inside of the cell has a higher concentration and the molecules outiside have a lower concentration, so to bring the molecules into the cell would be going against the concentration gradient

carrier proteins are used to pick up specific molecules and take them through the cell membrane against the concentration gradient

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occurs during digestion in the small intestine

carbohyrates are broken down into simple sugars such as glucose

uptake of ions from soil water by root hair cells in plants

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