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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Homeostatis and the Control of Temperature

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Homeostatis and the control of temperature

Homeostatis and the Control of Temperature

By Adam & Lucy


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


Example

Example:


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 <www.biologymad.com/resources/A2%20Homeostasis.pdf>


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