Thermoregulation

• What should you be able to describe by the end of this video?

  How the brain monitors body temperature
• What does homeostasis maintain in the body?

  Relatively constant internal conditions
• What is the normal human body temperature?

  37 degrees Celsius
• What part of the brain monitors body temperature?

  Thermo regulatory center
• What do the receptors in the thermo regulatory center respond to?

  Temperature of the blood
• How does the skin contribute to temperature monitoring?

  It contains temperature receptors
• What happens when body temperature gets too high?

  The body sweats to cool down
• What is the process of sweating and its effect?

  Sweat evaporates, cooling the body
• What happens to blood vessels when the body gets too hot?

  They dilate, allowing more blood flow
• What is the term for blood vessel dilation?

  Vasodilation
• What is the result of vasodilation in the body?

  More blood flows through capillaries
• How does the body respond when temperature drops too low?

  Blood vessels constrict to retain heat
• What is the term for blood vessel constriction?

  Vasoconstriction
• What happens to blood flow during vasoconstriction?

  Less blood flows through capillaries
• What is one way the body generates heat when cold?

  Shivering increases muscle contraction
• What does increased respiration in muscles release?

  Heat to warm the body
• What happens to sweating when body temperature is too low?

  We stop sweating
• How does the body respond to changes in temperature?

  • If too hot:
  • Sweating occurs
  • Blood vessels dilate (vasodilation)
  • If too cold:
  • Shivering occurs
  • Blood vessels constrict (vasoconstriction)
  • Sweating stops
• Where can you find questions on body temperature control?

  In the vision workbook
• What is the link between the thermo regulatory center and body temperature?

  It detects changes and initiates responses