Final answer:
Homeostasis is the activity of cells throughout the body to maintain the physiological state within a narrow range. It is regulated by negative feedback loops and consists of a stimulus, sensor, control center, and effector.
Step-by-step explanation:
Homeostasis is the activity of cells throughout the body to maintain the physiological state within a narrow range that is compatible with life. It is regulated by negative feedback loops and consists of a stimulus, sensor, control center, and effector. Negative feedback loops work to prevent an excessive response to a stimulus and keep a variable within the normal range. For example, body temperature regulation involves a negative feedback loop where high body temperature activates the sweat glands to bring down the temperature. When the body temperature reaches the normal range, the process stops.