When the body is exposed to dangerously low temperatures, shivering and surface capillary vasoconstriction occur. This is an example of .

negative feedback

Explanation:

When the temperature of the body falls below the normal level, the shivering and surface capillary vasoconstriction that occurs is an example of a negative feedback mechanism of maintaining homeostasis.

The negative feedback mechanism act to counter the process that causes the deviation away from the normal body temperature, the set point. The sensor/receptor which is the skin, in this case, sends information to the control center (part of the brain), the control switch then activates the process of vasoconstriction and muscle shivering to raise the body temperature in case of abnormally low temperature or vasoconstriction and heavy breathing in case of abnormally high temperature.

The entire process is an example of negative feedback in homeostasis.