1. Negative Feedback Systems

2. Negative Feedback: Maintaining Homeostasis System has a set point (ideal level) If it drops below that level, something is produced… If it exceeds that level, production stops… Examples: Thermostat Toilet Water bottle

3. Glucose/insulin Feedback

4. Negative Feedback

5. POSITIVE FEEDBACK

6. Defined… Feedback in which the system responds so as to increase the magnitude of any particular perturbation A type of control in which a change triggers mechanisms that amplify that change Results in amplification of the original signal instead of stabilization. Any system where there is a net positive feedback will result in a runaway situation.

7. Positive Feedback Example

8. Countercurrent heat exchanger