During a race, the body temperature of a runner increases. The runner responds by perspiring, which lowers body temperature. This process is an example of:
A. maintenance of homeostasis.
B. an acquired characteristic.
C. an antigen-antibody reaction.
D. environmental factors affecting phenotype.
Homeostasis is the maintenance of a stable, internal environment. In trying to keep a body temperature of 98.6 degrees Fahrenheit, if your body heats up due to exercise, sweating cools your body temperature by allowing heat to escape through your pores when the sweat evaporates.