body temperature

• How does the body lower body temperature?

  • blood vessels dilate (vasodilation)
  • More blood flows near to the surface of the skin
  • Evaporation uses heat from the skin - causing sweat
• How does the body raise body temperature?

  • blood vessels constrict (vasoconstriction)
  • less blood flows near the surface of the skin
  • skeletal muscles contract - causing shivering
• How is body temperature monitored and controlled?

  The thermoregulatory centre in the brain.
• How is a change in temperature detected?

  • Receiving nervous impulses from temperature receptors in the skin.
  • Receptors in the body that detect the blood's temperature as it circulates.