G proteins, named after the fact they bond with guanine nucleotides, are largely responsible for intercellular communications within the human organism. These transmissions regulate such functions as hormone secretion, muscle contaction, and even cognition. These transmissions take place because of chemical reactions between enzymes that bind with the G proteins and change into enzymes that trigger other chemical reactions. These chemical reactions induce cellular changes to occur by increasing a certain enzyme or chemical, thus changing the production or consumption of another chemical. Epinephrine, starts the reactions by sti