GenoDrive Reviews Today we know that hormones are one of the body's greatest means of communication (the others are the nervous and immune systems). Basically, hormones are proteins with a special function: they communicate information from one organ to one or more others. A hormone, released by one of the dozens of glands, moves through the blood until it reaches a cell with a hormone specific receptor. Then, like a key in a lock, the molecule attaches to the receiver and sends a signal inside the cell. The signal may tell the cell to produce some protein or multiply. The word "hormone" was introduced in 190 by a British physiologist, Professor Ernest Starling .
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