homeostasis

• Human body temp

  36.5-37.5
• If human body temp becomes too high:

  • Sweat (evaporated from skin)
  • Vasodilation (more blood flows closer to the surface of skin)
  • Cheeks become red
• If human body temp becomes too low:

  • Vasoconstriction (blood does not flow close to the surface)
  • Sweating stops
  • Shiver (generate heat from respiration)
  • Hair stands up (traps more heat)
• Homeostasis 


  Maintenance of a constant internal environment
• Hormone


  Chemicals released directly into the blood stream