Environmental Air Temperature Can Fluctuate Many Degrees During the Course

Environmental air temperature can fluctuate many degrees during the course of a day. A human's body temperature

A) can also fluctuate many degrees.
B) is lowered by shivering.
C) must be maintained within a range of a few degrees.
D) is not maintained internally but fluctuates with the air temperature.
E) is raised by sweating and dilation of blood vessels in the skin. Body temperature regulation is the primary example used to explain both homeostasis and negative feedback loops. It, along with certain other characteristics, is maintained within a narrow range.