homeostatis and the control of temperature
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Homeostatis and the Control of Temperature. By Adam & Lucy. What is it?. Homeostatis is the control of the internal environment Animals that can control it themselves are called warm-blooded Animals that cannot control it themsleves are called cold-blooded. What is it controlled by?.

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Presentation Transcript
what is it
What is it?
  • Homeostatis is the control of the internal environment
  • Animals that can control it themselves are called warm-blooded
  • Animals that cannot control it themsleves are called cold-blooded
what is it controlled by
What is it controlled by?
  • Thermoreceptors in the skin
  • Thermoreceptors in the hypothalamus
  • In humans - thermoregulatory centre in hypothalamus
how is it controlled
How is it controlled?
  • Thermoreceptors in the skin and hypothalamus detect when the internal temperature is too high or low
  • They send messages to the brain
  • Effectors then correct the problem
  • Controlled by a negative feedback system
temperature in the body
Temperature in the Body
  • The body’s internal temperature should be about 36.8°C
  • When the external temperature lowers, the human body shivers and blood vessels contract
  • When the external temperature rises, the human body sweats and blood vessels dilate
other information
Other information
  • A fever is when the body temperature rises
  • In cold situations, frostbite can sometimes occur because the organs have more priority for the blood than limbs, so the blood flow is restricted to some parts of the body; also, tissues are damaged by the harsh cold conditions
bibliography
Bibliography
  • “Homeostatis” March, 2006, online
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