Chapter 4 - Section 4.8 - Homeostasis - Check Your Progress - Page 88: 3

Negative feedback mechanisms work to keep the internal environment stable. When a sensor detects a drastic change, a control center directs an effect that reverses that change in an attempt to bring conditions back to normal. Positive feedback mechanisms exaggerate changes in the internal environment. When a change is detected, a positive feedback mechanism directs a rapid change in the same direction, making the change even more extreme.

Negative feedback mechanisms work to keep the internal environment stable. When a sensor detects a drastic change, a control center directs an effect that reverses that change in an attempt to bring conditions back to normal. Positive feedback mechanisms exaggerate changes in the internal environment. When a change is detected, a positive feedback mechanism directs a rapid change in the same direction, making the change even more extreme.