Please give an example of how a human maintains homeostasis.

Homeostasis is the process or system that gives living
organisms the ability to maintain a stable set of conditions inside its body.  Animal
need to maintain stable internal conditions such as body temperature, blood pressure,
and the composition of body fluids. Homeostasis is their ability to do so. To maintain
homeostasis, an organism reacts to its external environment by making internal
adjustments.

For example, when a person steps outside on a
hot day, the body must adjust to the heat. Otherwise the body temperature would rise so
high that serious damage to the body cells, and even death may occur. Therefore, when
the heat from the sun strikes the skin, nerve endings sense that heat and send a message
to the brain.  The brain sends nerve impulses that cause corrective changes in the body
functions such as increase in blood flow to the skin produces greater heat loss from the
skin surface, increased sweating to cools the skin by evaporation.  The brain also
causes person to take voluntary action. For example, in the above example the person
person may want to decrease physical activity and seek a cool place. because of the
sensations created by the excess heat.