Homeostatis

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  • Created by: Gina
  • Created on: 30-04-18 08:02

1. Why do we sweat a lot when we are cold?

  • It causes our hairs to stand up and trap in insulating air
  • Because sweating generates heat in the body
  • Trick question: The body produces very little sweat when we are cold as the sweat gets rid of some heat in the body when it evaporates and the body needs heat at that moment
  • Sweating triggers the effectors in the body to shiver
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Other questions in this quiz

2. Why does the human body's temperature need to be kept around 37 degrees Celsius?

  • The optimum temperature for many enzymes controlling reactions in the human body is 37 degrees Celsuis
  • So that the atmosphere in the air gives us oxygen

3. What is one way the body loses water from the body

  • Through teeth
  • Via the lungs in breath
  • Through the fingers
  • Via the heart in circulation

4. Why do our blood vessels widen when we are hot?

  • So that more blood flows near the surface of the skin, leading to energy being transferred into the surroundings, which cools you down
  • So the insulating layer of air gets trapped
  • Trick question: Our blood constricts when we are hot
  • So that very little sweat gets produced

5. Why does urine go dark in colour on a hot day and/or when you're exercising?

  • The kidneys do not excrete as much urine in those conditions
  • Trick question: Urine is paler in colour on a hot day and/or when you're exercising
  • It is more concentrated as water has been lost from sweating (being hot) and breathing a lot more (exercising)
  • Because blood is not flowing as much in the body in those conditions
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