If the body doesn't keep the body at homeostasis then your body is in trouble. If someone has diabetes then that disease will throw your body off balance. There are ways, artificially, to keep your body at homeostasis.
Negative feedback is used to regulate the blood glucose levels. When your glucose levels get to high or low, there is a response to get the body back to homeostasis.
A change happens in the body. The stimulus sends a "message" to the brain. The brain then sends a command and the change is reversed.
Negative feedback is a part of homeostasis that keeps the body at normal levels. Negative feedback detects change an works to stop it.
Shows how homeostasis is achieved using body temperature as an example. If it gets cold, your body would start to shiver. If your body gets to hot your body starts to sweat.
Homeostasis comes from a Greek origin, means same and steady. It's the process of the body maintaining steady levels of internal conditions. Homeostasis is mostly used in science but it can be used in other example. Negative feedback is a function used to maintain homeostasis.