Homeostasis Basics (B1)

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  • Created by: puntm003
  • Created on: 16-02-14 12:50

Ion Content

  • Ions are taken into the body by food and then absorbed into the blood
  • If there are too many of any kind of ion they will need to be removed
  • Some ions can be lost in sweat and the kidneys will remove the excess from the blood- then it is removed from the body in urine
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Blood Sugar

  • Eating food containing carbohydrates puts glucose into the blood from the gut
  • Normal metabolism of cells removes glucose from the blood
  • If you do a lot of vigorous exercise a lot more glucose is removed
  • Insulin, which is a hormone, helps to maintain the right level of glucose in the blood
  • This means the cells get a constant supply of energy
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Water Level

  • Water is taken into the body through food and drink
  • It is lost through sweat, breath and urine
  • On a cold day you don't sweat as much so you'll produce more urine, which will be pale as the waste is more diluted
  • On a hot day you will sweat a lot so you'll produce less urine, which will be a deeper colour as the waste is more concentrated
  • When you're exercising you will lose more water through your breath because you breathe faster when exercising
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Body Temperature

  • All enzymes work best at a certain temperature
  • Enzymes in the human body work best at 37 degrees C
  • The brain acts as a thermostat
  • It's sensitive to blood temperature in the brain
  • It also recieves messages from the skin that provides information about skin temperature
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