Hormones are also part of the communications system, acting as chemical messengers. For example : your blood sugar starts rising. Your pancreas steps up production of insulin, the hormone that says, “Speed up burning of sugar”. The bloodstream carries this work order around and the cells respond. Or, you may decide to chop some wood. You will need extra energy. In this case your thyroid sends the hormonal work order to cells : “Speed up production of ATP”.
Tags: Cell, hormones, role of hormones