Temperature Regulation

10 Questions | Total Attempts: 753

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Temperature Quizzes & Trivia

Questions and Answers
  • 1. 
    The heat transfer mechanism that occurs between the sun and the outer layer of the skin is called what?
    • A. 

      Conduction

    • B. 

      Convection

    • C. 

      Radiation

    • D. 

      Evaporation

  • 2. 
    The heat transfer mechanism that occurs between arteries and veins in a countercurrent exchange is called what?
    • A. 

      Conduction

    • B. 

      Convection

    • C. 

      Radiation

    • D. 

      Evaporation

  • 3. 
    What is the major heat source to retain body temperature for a nude 65-kg adult person in a 29oC/84.2oF environment?
    • A. 

      Brain

    • B. 

      Brown adipose tissue

    • C. 

      Liver

    • D. 

      Skeletal muscle

    • E. 

      White adipose tissue

  • 4. 
    Which of the following is a human thermoregulatory response controlled by cholinergic sympathetics?
    • A. 

      Brown adipose tissue thermogenesis

    • B. 

      Hand vasomotion

    • C. 

      Shivering thermogenesis

    • D. 

      Sweat secretion

    • E. 

      Thermoregulatory behavior

  • 5. 
    Which of the following will most faithfully reflect changes in human core temperature that could be caused by immersion in a warm body bath?
    • A. 

      Oral temperature

    • B. 

      Rectal temperature

    • C. 

      Axillary temperature

    • D. 

      Tympanic temperature

    • E. 

      Esophageal temperature at the cardia

  • 6. 
    In a man passively warmed such that his mean skin temperature reaches 40.5oC/104.9oF, which of the following circulatory responses will occur?
    • A. 

      Increased cardiac output, decreased splanchnic blood flow

    • B. 

      Increased cardiac output, increased muscle blood flow

    • C. 

      Unchanged cardiac output, decreased right atrial pressure

    • D. 

      Unchanged cardiac output, decreased renal blood flow

  • 7. 
    Which of the following is true at the beginning of the rising phase of fever?
    • A. 

      Sweat secretion is stimulated

    • B. 

      Mean skin temperature is below normal

    • C. 

      Muscle blood flow is decreased

    • D. 

      Behavioral thermoregulatory responses are inhibited

    • E. 

      Warm-sensitive neurons in the integration center are excited

  • 8. 
    The principal physical mechanism that accounts for the transfer of heat within the body is what?
    • A. 

      Conduction

    • B. 

      Convection

    • C. 

      Radiation

    • D. 

      Evaporation

  • 9. 
    When the environmental temperature increases moderately, what happens to blood flow to the skin?
    • A. 

      It decreases to stop the transport of heat from the skin surface to deeper tissues

    • B. 

      It decreases because the local thermoreceptors in the skin sense an increase in body temperature

    • C. 

      It increases because the sweat glands release vasodilators

    • D. 

      It increases as part of the body temperature regulatory mechanisms

    • E. 

      It increases as the metabolic needs of the skin tissue increase

  • 10. 
    • A. 

      Increased sympathetic dilation of their blood vessels

    • B. 

      Increased hypotension

    • C. 

      Their skin becomes very dry

    • D. 

      They suddenly faint

    • E. 

      They have an increased volume of sweat production