Which of the following is not a means of increasing or conserving heat production?
a. shivering.
b. skin vasodilation.
c. nonshivering thermogenesis.
d. increased muscle tone.
e. increased exercise.
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Question 2) Receptors that relay thermal information to the temperature control centers include
a. peripheral warm and cold thermoreceptors in the skin.
b. central thermoreceptors in the hypothalamus.
c. central thermoreceptors in internal organs.
d. both (a) and (b) above.
e. all of these answers.
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Question 3) Sweating
a. causes vasodilation of the skin vessels.
b. increases the insulative capacity of the skin so that less heat can be gained from the environment.
c. is the only heat-loss mechanism available to the body when the environmental temperature is so high that a normal temperature gradient between the skin and the environment cannot be established.
d. both (a) and (c) above.
e. all of these answers.
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Question 4) This area houses the body's internal thermostat
a. hypothalamus.
b. cerebellum.
c. skin.
d. cerebral cortex.
e. medulla.
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Question 5) Heat can be lost directly to the external environment by the vasodilation of blood vessels in the ____.
a. hypothalamus.
b. cerebellum.
c. skin.
d. cerebral cortex.
e. medulla.
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Question 6) Sweating:
a. is an active evaporative heat-loss process under sympathetic nervous control.
b. is the only means of losing heat when the environmental temperature is warmer than body temperature.
c. can be regulated by sympathetic activity
d. both (a) and (b) above.
e. all of the above
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Question 7) On the average, about half of the body heat that is lost is due to loss by
a. radiation.
b. convection.
c. conduction.
d. evaporation.
e. none of these answers.
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Question 8) The type of heat loss that occurs by sitting on a cold car seat is
a. radiation.
b. convection.
c. conduction.
d. evaporation.
e. none of these answers.
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Question 9) A person can lose heat to an environment warmer than the body by means of
a. radiation.
b. evaporation.
c. conduction.
d. both radiation and evaporation.
e. all of these answers.
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Question 10) When the surrounding temperature is low, heat is lost from the body by means of
a. radiation.
b. conduction/convection.
c. nonshivering thermogenesis.
d. both radiation and conduction/convection are correct.
e. all of these answers.
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