Thermoregulation

• What is thermoregulation?

  Thermoregulation is the control of our internal body temperature.
• Why do we need to regulate our body temperature?

  We need to regulate our temperature to allow our cells to function properly.
• Which part of the brain controls thermoregulation?

  The hypothalamus controls thermoregulation.
• What does homeostasis refer to?

  Homeostasis refers to maintaining a stable internal environment.
• What is the ideal body temperature that needs to be maintained?

  The ideal body temperature is around 37 degrees Celsius.
• Why is 37 degrees Celsius important for enzymes?

  37 degrees Celsius is the perfect temperature for enzymes to function.
• What happens to enzyme activity if body temperature falls below 37 degrees Celsius?

  If body temperature falls below 37 degrees Celsius, enzyme activity slows down.
• What happens to enzymes if body temperature rises above 37 degrees Celsius?

  If body temperature rises above 37 degrees Celsius, enzymes start to denature and can't work at all.
• What is the role of the thermoregulatory sensor?

  The thermoregulatory sensor acts as a thermostat for our body.
• Where is the thermoregulatory sensor located?

  The thermoregulatory sensor is located in the hypothalamus.
• What do receptors throughout the body do in relation to temperature?

  Receptors detect changes in body temperature and send information to the thermoregulatory sensor.
• What happens when the brain detects that the body is too hot?

  The brain sends out signals designed to cool the body down.
• What happens when the brain detects that the body is too cold?

  The brain brings about changes that warm the body back up.
• What mechanisms does the body use to warm up?

  • Vasoconstriction: constricting blood vessels near the skin surface to conserve heat.
  • Erector muscles contract: hairs stand on end to trap insulating air.
  • Shivering: muscle contractions generate heat through energy from respiration.
• What mechanisms does the body use to cool down?

  • Erector muscles relax: hairs fall flat to reduce insulation.
  • Vasodilation: blood vessels expand to transfer more heat to surroundings.
  • Sweating: evaporation of sweat takes heat energy away from the body.
• What is sweat composed of?

  Sweat is a mixture of water and salts.
• How does sweat help in cooling the body?

  Sweat cools the body by evaporating and taking heat energy away.
• Why does evaporation of sweat require a lot of energy?

  Evaporation of sweat requires a lot of energy because it needs to overcome the forces holding water molecules together.
• What is the overall purpose of thermoregulation?

  The overall purpose of thermoregulation is to maintain a stable internal body temperature for proper cellular function.
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