- Homeostasis is the tendency to resist change in order to maintain a stable, relatively constant internal environment.
- Homeostasis typically involves negative feedback loops that counteract changes of various properties from their target values, known as set points.
- In contrast to negative feedback loops, positive feedback loops amplify their initiating stimuli, in other words, they move the system away from its starting state.
- One is activated when a parameter—like body temperature—is above the set point and is designed to bring it back down.
- One is activated when the parameter is below the set point and is designed to bring it back up.
Homeostatic responses in temperature regulation
Disruptions to feedback disrupt homeostasis.
- Muscle and fat cells don't get enough glucose, or fuel. This can make people feel tired and even cause muscle and fat tissues to waste away.
- High blood sugar causes symptoms like increased urination, thirst, and even dehydration. Over time, it can lead to more serious complications.