When blood glucose levels rise, the pancreas detects this, and begins secreting the hormone insulin. The insulin travels through the bloodstream, and binds to the receptors on the muscle cells and liver. The muscle cells and liver then begin to take in glucose through a transporter. Once the levels are back to normal, the pancreas detects that homeostasis has been achieved, and stops secreting insulin. (Negative Feedback Loop)
This text is all about glucose. From the definition, to the physiology, to the normal ranges of it in the body and causes of it being abnormally high.
This article talks about how the human body uses many negative feedback systems to maintain internal stability or, homeostasis.