A malfunction of the thermoregulatory mechanisms caused by fluid loss in sweat is known as 23:39 Metabolism and Energetics A malfunction of the thermoregulatory mechanisms caused by fluid loss in sweat is known as a. thermoneogenesis. b. heat exhaustion. c. hydrosis. d. afebrile reaction. e. dehydration reaction. Answer: B Learn More : Share this Share on FacebookTweet on TwitterPlus on Google+