Controlling internal conditions

  • Created by: siobhan
  • Created on: 10-05-13 18:42
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  • Controlling internal conditions
    • the internal conditions in the body must be carefully controlled
      • keeping the conditions within a narrow range is called homeostasis
    • temperature, blood glucose, water and ion content and levels of waste products must all be controlled
    • waste products that have to be removed from the body include
      • carbon dioxide, produced by respiration, removed via the lungs and exhaled
      • urea, produced in the liver from the breakdown of amino acids, removed by the kidneys and temporarily stored in the bladder
    • Water and ions enter the body when we eat and drink. If the water or ion content in the body is wrong, too much water may move into or out of the cells. This could damage or destroy cells


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