The thermoneutral zone is
a. maintained by sweating and shivering mechanisms
b. the temperature within the body core that remains constant despite changes in environmental temperature
c. the environmental temperature range within which core temperature can be kept constant by skin vasomotor responses without calling supplementary heat-production or heat-loss mechanisms into play
d. the controlled environment within a building equipped with both heating and air-conditioning
e. the environmental temperature identical to core temperature so that body temperature is held constant without any physiological compensatory mechanisms being instituted
C
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