Homeostasis

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  • Homeostatus
    • Homeostatus is maintaining a constant internal environment
      • Levels of CO2
      • Water Content
      • Body Temperature
    • Negative Feedback
      • Works to keep everything steady
      • It counteracts any changes
      • It allows the body to stay at a constant tmeperature over a long period of time
    • Body Temperature is controlled by the brain
      • Enzymes in the human body work best at 37*
      • Thermoregulatory centre - personal thermostat
        • Contains receptors that are sensitive to temperature. Receives impulses of change through nervous and hormonal systems to control temperature
    • When you are cold
      • Little sweat
      • Blood vessels near a surface constrict to let less heat out
        • When your body drops to low temperatures over a long time you could get hypothermia, which you can die from
          • Little sweat
      • Shivering
        • When your body drops to low temperatures over a long time you could get hypothermia, which you can die from
        • Hairs stand up to trap heat
        • When you are hot
          • Hairs lie flat
            • High temperatures can lead to dehydration and cause heat stroke which could kill you
          • Lots of sweat is produced - cools you down
            • High temperatures can lead to dehydration and cause heat stroke which could kill you
          • Blood vessels near the surface widen to radiate heat

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