Answer: Homeostasis is energy-consuming physiological mechanism.
Homeostasis is the property of a system in which a variable is actively regulated to remain very nearly constant. Each of these variables is controlled by a separate homeostat ( regulator ) which together maintains life.
Core Body Temperature Homeostat
Mammals have the ability to control their core temperature. When core body temperature falls, behavioral changes are set in motion. The blood flow is reduced to a minimum via sympathetic nerves, which constrict the limb arteries. The metabolic rate of the body is increased.