control of body temp

• Why is the control of body temperature crucial for humans?


  It is crucial for maintaining homeostasis.
• Where is the thermoregulatory center located in the human body?


  In the hypothalamus of the brain.
• What is the approximate normal range for human body temperature?


  Approximately 36.5°C to 37.5°C.
• What are the mechanisms of thermoregulation in the human body?


  • Monitoring Temperature
  • Thermoregulatory Centre: Contains blood temperature receptors.
  • Skin Receptors: Detect external temperature changes.
  • Response to High Body Temperature:
  • Vasodilation: Blood vessels widen, increasing blood flow to the skin.
  • Sweating: Sweat evaporates, cooling the body.
  • Response to Low Body Temperature:
  • Vasoconstriction: Blood vessels narrow, reducing heat loss.
  • Shivering: Skeletal muscles contract, generating heat.
• What is the role of the thermoregulatory center?


  It monitors the body's internal temperature and initiates responses.
• How do skin receptors contribute to thermoregulation?


  They detect changes in external temperature and send impulses to the thermoregulatory center.
• What happens during vasodilation in response to high body temperature?


  Blood vessels in the skin widen, increasing blood flow to the skin surface.
• What is the effect of sweating on body temperature?


  Evaporation of sweat removes heat from the body, cooling it down.
• How do vasodilation and sweating work together?


  They both lower body temperature effectively.
• What occurs during vasoconstriction in response to low body temperature?


  Blood vessels in the skin narrow, decreasing blood flow to the skin surface.
• What is the role of shivering in thermoregulation?


  Skeletal muscles contract involuntarily, generating heat.
• How do vasoconstriction and shivering work together?


  They both raise body temperature effectively.
• What happens in the body during hot conditions?

  Vasodilation and sweating are activated to cool down.
• What is the result of energy transfer from the body to the environment in hot conditions?


  It results in a decrease in body temperature.
• What occurs in the body during cold conditions?

  Vasoconstriction and shivering are activated to retain heat.
• What is the effect of energy conservation and generation in cold conditions?


  It results in an increase in body temperature.
• Compare the body's responses to high and low temperatures.

  High Temperature Responses:

  • Vasodilation: Blood vessels widen.
  • Sweating: Sweat evaporates to cool down.

  
  

  Low Temperature Responses:

  • Vasoconstriction: Blood vessels narrow.
  • Shivering: Muscles contract to generate heat.