Homeo + temp

• What is homeostasis?

  Homeostasis keeps all of the body's internal conditions relatively constant
• What is the normal human body temperature?

  37 degrees Celsius
• How is body temperature monitored and controlled?

  It is monitored and controlled by the brain's thermoregulatory centre
• What does the thermo regulatory center contain?

  Receptors sensitive to the temperature of the blood
• What role do temperature receptors in the skin play?

  They send electrical impulses via sensory neurons to the thermoregulatory center
• What happens when body temperature gets too high?

  The body responds by activating sweat glands and dilating blood vessels
• How does sweating help cool the body down?

  Evaporation of sweat takes energy from the body, cooling it down
• What is vasodilation?

  It is the widening of blood vessels supplying the capillaries
• What effect does vasodilation have on blood flow?

  More blood flows through the capillaries, allowing heat to transfer out
• What happens when body temperature drops too low?

  The blood vessels supplying the capillaries constrict
• What is vasoconstriction?

  It is the narrowing of blood vessels supplying the capillaries
• How does the body respond to low temperatures through shivering?

  Shivering contracts skeletal muscles, increasing respiration and generating heat
• What happens to sweating when body temperature falls too low?

  The body stops sweating
• What is the process of temperature regulation in the body?

  • The thermo regulatory center detects temperature changes
  • If temperature is too high:
  • Sweat glands activate
  • Blood vessels dilate (vasodilation)
  • If temperature is too low:
  • Blood vessels constrict (vasoconstriction)
  • Shivering occurs
  • Sweating stops
• How does the body maintain homeostasis in temperature regulation?

  • The thermo regulatory center monitors blood temperature
  • Receptors in the skin send signals to the brain
  • The body responds to deviations from the normal temperature (37 degrees Celsius)