Refer to the Graphs Showing the Results of an Experiment

Multiple Choice

Refer to the graphs showing the results of an experiment in which researchers heated and cooled the hypothalamus of a mammal and determined its metabolic rates at different environmental (ambient) temperatures. Based on the figure, which statement is true?

A) When the hypothalamus was cooled, body temperature fell.
B) When the hypothalamus was cooled, metabolic rate increased.
C) The metabolic rate was higher when the hypothalamus was warmed to 40°C.
D) The hypothalamic set point was increased when the hypothalamus was warmed to 40°C.
E) When the hypothalamus was warmed, body temperature increased.