Final answer:
Homeostatic mechanisms share three components: input, the detection of a change; process, the response sequence determined by a control center; and output, the corrective action to restore balance.
Step-by-step explanation:
The three components that homeostatic mechanisms share are input, process, and output. Input refers to the detection of a change in the internal or external environment, such as a change in temperature, which is usually detected by receptors.
Process is the sequence of events that occurs in response to the detected change, often involving a signal to a control center, which integrates the information and determines the appropriate response. Lastly, Output is the action taken to counteract the change and restore balance, such as altering heat production or loss to maintain body temperature. This output typically occurs via effectors, which bring about the necessary changes to return the system to its setpoint. These components work together to maintain homeostasis, the stable internal conditions necessary for survival.