What Do You Know About Thermoregulation? Trivia Quiz
(36).jpg "What Do You Know About Thermoregulation? Trivia Quiz - Quiz")
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- 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.Which one of the following must occur continuously if a mammal is to maintain a body temperature above that of the surrounding?
- 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.What happens when the body temperature falls below 37°C?
- 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.What happens when the core temperature of the body increases?
- 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.
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