What Do You Know About Thermoregulation? Trivia Quiz

17 Questions | Total Attempts: 2961

SettingsSettingsSettings
Please wait...
What Do You Know About Thermoregulation? Trivia Quiz

.


Questions and Answers
  • 1. 
    Heat is lost from the skin of man on a hot day by the
    • A. 

      Movement of the skin capillaries nearer to the surface.

    • B. 

      Relaxation of arterioles so that the skin capillaries carry more blood.

    • C. 

      Opening of the pores of all the sweat glands.

    • D. 

      Evaporation of water from the sebaceous glands.

  • 2. 
    Sweat is composed of
    • A. 

      Amino acids + water + lymph.

    • B. 

      Urea + water + sodium chloride.

    • C. 

      Uric acid + water + sodium hydroxide.

    • D. 

      Plasma + water + sodium bicarbonate.

  • 3. 
    By experiment, it was found that the heat loss per unit weight of a small mammal was greater than that of a large mammal, although their body temperatures remained constant. Which one of the following conclusions can be drawn from this result?
    • A. 

      Small mammals are more active than large mammals.

    • B. 

      Large mammals are better adapted than small mammals to their physical. environment

    • C. 

      Small mammals have a higher metabolic rate than large mammals.

    • D. 

      Large mammals have a greater surface area than small mammals.

  • 4. 
    Which one of the following is the reaction of the skin of a human when the body becomes very cold?
    • A. 

      The arterioles constrict, the hair stands on end and sweat production ceases.

    • B. 

      The arterioles constrict, the hair lies flat on the skin and sweating occurs.

    • C. 

      The arterioles dilate, the hair stands on end and sweat production almost ceases.

    • D. 

      The arterioles dilate, the hair lies flat on the skin and sweating occurs.

  • 5. 
    The most important function of sweat is to remove from the body excess.
    • A. 

      Heat.

    • B. 

      Salts.

    • C. 

      Water.

    • D. 

      Urea.

  • 6. 
    • A. 

      Digestion.

    • B. 

      Respiration.

    • C. 

      Shivering.

    • D. 

      Sweating.

  • 7. 
    Which one of the following structural features of the skin does not play a part in temperature regulation in a mammal?
    • A. 

      Hair erector muscles.

    • B. 

      Fat in the dermis.

    • C. 

      Malpighian layer.

    • D. 

      Nerve endings.

  • 8. 
    Which one of the following is produced by sebaceous glands?
    • A. 

      Adrenaline.

    • B. 

      Oil.

    • C. 

      Saliva.

    • D. 

      Sweat.

  • 9. 
    Which of the following describes the blood vessels, sweat glands, and temperature of the skin after a period of exercise?
    • A. 

      Blood vessels - constricted; Sweat glands - inactive; Skin temperature - low.

    • B. 

      Blood vessels - constricted; Sweat glands - inactive; Skin temperature - high.

    • C. 

      Blood vessels - constricted; Sweat glands - active; Skin temperature - low.

    • D. 

      Blood vessels - dilated; Sweat glands - active; Skin temperature - high.

  • 10. 
    Which action helps to restore correct body temperature following an increase in the temperature of the blood passing through the brain?
    • A. 

      Contraction of the hair erector muscles.

    • B. 

      Increased metabolic rate.

    • C. 

      Reduced blood supply to the skin.

    • D. 

      Sweating.

  • 11. 
    What happens to the sweat glands, blood vessels, and temperature of an athlete’s skin after a 100 meters race?
    • A. 

      Sweat glands - inactive; Blood vessels - dilated; Skin temperature - high.

    • B. 

      Sweat glands - inactive; Blood vessels - constricted; Skin temperature - low.

    • C. 

      Sweat glands - inactive; Blood vessels - constricted; Skin temperature - high.

    • D. 

      Sweat glands - active; Blood vessels - dilated; Skin temperature - high.

  • 12. 
    • A. 

      Blood flow to skin - decreased; Sweating - decreased.

    • B. 

      Blood flow to skin - decreased; Sweating - increased.

    • C. 

      Blood flow to skin - increased; Sweating - decreased.

    • D. 

      Blood flow to skin - increased; Sweating - increased.

  • 13. 
    What is the result of a rise in body temperature?
    • A. 

      A decrease in the production of sweat.

    • B. 

      An increase in blood flow to the skin.

    • C. 

      Narrowing of blood vessels in the skin

    • D. 

      Raising of hairs on the skin.

  • 14. 
    • A. 

      Diameter of superficial blood vessels - decreases; Urine production - decreases.

    • B. 

      Diameter of superficial blood vessels - decreases; Urine production - increases.

    • C. 

      Diameter of superficial blood vessels - increases; Urine production - decreases.

    • D. 

      Diameter of superficial blood vessels - increases; Urine production - increases.

  • 15. 
    Which response to overcooling does not involve muscle contraction?
    • A. 

      Blood vessels narrowing.

    • B. 

      Hairs standing up.

    • C. 

      Shivering.

    • D. 

      Reduced sweating.

  • 16. 
    What explains why, in identical conditions, a young boy loses more heat than a man?
    • A. 

      The boy eats more carbohydrate.

    • B. 

      The boy has a larger surface-to-mass ratio.

    • C. 

      The boy is still growing.

    • D. 

      The boy sweats less than a man.

  • 17. 
    What happens to the arterioles near the surface of the skin when the body temperature rises?
    • A. 

      They absorb oxygen from the surrounding tissues.

    • B. 

      They dilate and become wider.

    • C. 

      They move nearer the skin surface.

    • D. 

      They take in water from the surrounding tissues.