Passage VII

Figure 1 shows how, on average, internal head temperature and skin temperature affect heat production (in calories per second, cal/sec) in humans.

Figure 2 shows how, on average, infernal head temperature and skin temperature affect evaporative heat loss (heat lost through the evaporation of perspiration) in humans.

Figures adapted from Arthur C. Guyton, M.D., Textbook of Medical Physiology. ©1991 by W. B. Saunders Company.

39. According to Figure 1, which of the following combi­nations of internal head temperature and skin tempera­ture results in the greatest heat production?

Answer and Explanation

Your Answer is

Correct Answer is A

Explanation

Look at figure 1. Among the four options, when the skin temperature is 22°C and the internal head temperature is 36.6°C, the ordinate heat production is larger