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Dopamine: one of the catecholamine neurotransmitters in the brain; it is derived from tyrosine and is the precursor to norepinephrine and epinephrine; dopamine is a major transmitter in the extrapyramidal system of the brain, and important in regulating movement; dopamine receptors mediate its action.Source: CRISP.t is derived from tyrosine and is the precursor to NOREPINEPHRINE and EPINEPHRINE. Dopamine is a major transmitter in the extrapyramidal system of the brain, and important in regulating movement. A family of receptors (RECEPTORS, DOPAMINE) mediate its action. Source: MeSH 2007.
Dopamine is a naturally occurring neurotransmitting chemical and hormone in the human body. In its pharmaceutical preparation, it is used to increase heart rate and blood pressure. Dopamine is produced in several areas of the brain, and its presence activates five different types of receptors in nerve cells.n its pharmaceutical preparation, it is used to increase heart rate and blood pressure. Dopamine is produced in several areas of the brain, and its presence activates five different types of receptors in nerve cells.