Homeostasis Feedback Loops

Homeostasis The ability of the body (or cell) to maintain internal conditions (equilibrium) Uses feedback controls (positive and negative)

Negative Feedback Controlled by hormones and nervous system If a level increases beyond a normal range, the body will send commands to lower it. If a level decreases beyond a normal range, the body will send commands to raise it.

Basic Negative Feedback Loop

Body Temperature Neg. FB Loop

Blood Glucose Levels (Neg FB)

Positive Feedback If a level increases beyond a normal range, the body will send commands to increase it even more.