Homeostasis is the process of the keeping the body in balance. Without this process organisms would not be able to live properly. The state of balnce is controlled by positive and negative feedback.Negative feed back is when a part of the body sends a signal to the brain when one part of the body is off balance. The liver, kidneys, and brain help with maintaining homeostasis. The liver helps with metabolizing toxic substances like alchol. The kidneys are responsible for regulating blood water levels, and the brain of course helps witht the whole process. One of the most common examples of homeostasis is sweating. When the body starts to get too hot it releases the sweat and heat. When the sweat onto the skin it quickly evaporates thus cooling off the body.
After being phyiscally active for a while the body runs out of energy and must find another source for energy. This is when the body goes to its body fat for energy. The body can only relay on this source for so long. If the body is not properly hydrated it can lead to a high heart rate, the temperature of the body increasing, and even muscle cramps. 
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