Catecholamines are a family of chemical compounds that act as neurotransmitters and/or hormones. Dopamine, Norepinephrine, and Epinephrine are the main Catecholamines produced by the human body. The molecular structure of Catecholamines is characterized by a catechol group bonded to a varying side chain containing an ethylamine and an amine group. The synthesis of a Catecholamine begins with the amino acid tyrosine and the enzyme tyrosine hydroxylase. Once Catecholamines are released, they interact with different cell receptors to accomplish multiple tasks throughout the body.