To maintain homeostasis, the body uses control systems involving receptors, control centers, and effectors. A stimulus is detected by receptors and signaled to the control center. The control center then sends responses through effectors to balance the stimulus and maintain stable internal conditions, even as external environments change. Negative feedback mechanisms shut off or reduce stimuli to return the body to normal states, while positive feedback can increase stimuli and disrupt homeostasis. Homeostasis of body temperature through these control systems is essential for biochemical processes to function properly.