human physiology study questions 36

human physiology study questions 36 - period B Activating...

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4/28/08 Lecture 36: Regulation of body temperature (Chpt. 16) Study Questions 1. Two individuals are doing strenuous work in a hot environment. Individual A has been working in the hot environment for the last 10 days. Individual B has just moved from a much colder environment and is starting work today. Do you expect to see any differences between the two workers? A. No, their work tolerance in the heat will be the same because it takes much longer than 10 days to acclimate to the heat. B. Yes, B would not be acclimated to the heat so he would be expected to have an earlier onset of sweating compared to A, who would be acclimated. C. Yes, B would not be acclimated to the heat so his temperature regulation set point would increase, which will result in hyperthermia. D. Yes, A would be acclimated to the heat so he would be expected to have a greater sweat volume that is more dilute when compared to B, who is not acclimated. 2. Which of the following statements are correct? A. Body temperature is highly regulated so it will not fluctuate at all over a 24-hour
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Unformatted text preview: period. B. Activating parasympathetic vasodilator nerves can increase blood flow to the skin. C. In response to a cold environment, blood vessels in the skin dilate in order to increase blood flow to the surface and keep you warm. D. Onset of a fever is a positive physiological response because it aids in the body’s defense against infection. 3. Which of the following statements is correct concerning the mechanisms of heat loss? A. In a very humid environment, the body’s main method of heat loss is by evaporation because you tend to sweat more. B. The rate of heat loss from the body is faster in cold air than cold water. C. The body will lose more heat on a calm day compared to a windy day. D. The body can absorb heat through the process of radiation but the body will not lose heat because heat exchange only travels down the temperature gradient. E. None are correct. Answers: 1) D; 2) D; 3) E...
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This note was uploaded on 07/01/2008 for the course INTEGRATIV 130 taught by Professor Kregel during the Spring '08 term at University of Iowa.

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