Homeostasis
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Homeostasis

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Homeostasis Presentation Transcript

  • 1. Homeostasiscontrolling conditions in the body
  • 2. Homeostasis – controlling conditions inthe bodySeveral things need to be controlled:• Water• Ions and minerals• Blood sugar• Temperature
  • 3. Water BreathingIn: Out:Water SweatingFood (eg vegetables) Urine (from the kidneys) SweatingKey organ is the kidney Urine (from the kidneys)
  • 4. IonsIons (eg calcium, sodium, potassium) SweatingFood Urine from the kidneys
  • 5. Blood sugarIn: Out:Drink and ExerciseFood Insulin – a hormone
  • 6. Temperature – needs to be 37°C Exercise Sweating Warm Blood circulation weather Hairs on body Enzymes work best at 37°C If too high enzymes can’t work. Too low the enzymes can’t work
  • 7. Keeping a constant temperatureTo keep warm: To keep cool:- Shivering – uses -Sweating energy -Vaso-dilation- Releasing energy from food- Vasoconstriction- Exercising Controlled by the hypothalamus