The tendency to maintain a stable, relatively constant internal environment is called homeostasis.
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, positive feedback loops amplify their initiating stimuli, in other words, they move the system away from its starting state.
The concentration of various ions in your blood must be kept steady, along with pH and the concentration of glucose. If these values get too high or low, person might end up getting very sick.
Therefore, the tendency to maintain a stable, relatively constant internal environment is called homeostasis.
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