6B - Regulation of body temp

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bio unit 1

5 Terms

1
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endotherms

maintain a regular body temperature and produce heat through metabolic processes

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ectotherms

rely on external environment for heat

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heat loss

  • conduction -transfer of heat through touch

  • convection -warm air or water rising

  • radiation -heat exits to the atmosphere via infra-red waves

  • evaporation -liquid to gas


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methods used by body to stay cool

increase in body temp - thermoreceptors - hypothalamus -

  • sweat glands - sweating

  • small blood vessels in the skin - dilatation of arterioles

  • arrector pili muscles - flattening of hair


5
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methods used by the body to remain warm

decrease in body temp - thermoreceptors - hypothalamus -

  • skeletal muscle cells - shivering

  • small blood vessels in the skin - constriction of arterioles

  • arrector pili muscles - lifting of hair