| A | B |
| feedback mechanism | cycle where response modifies the first action |
| respond | reaction to a stimulus |
| stimulus | a change in the environment that brings about a response |
| dynamic equilibrium | homeostasis - everything working to keep the system in balance |
| homeostatic equilibrium | systems working together to keep the organism healthy |
| inbalance | homeostasis not working - sickness |
| insulin | produced by pancreas to lower blood sugar |