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Posted on Mar 19, 2008, 9 a.m.
By Bill Freeman
An excitatory neurotransmitter involved in alertness, concentration, aggression and motivation, among other behaviors. Norepinephrine is made in the brain from the amino acid phenylalanine.
An excitatory neurotransmitter involved in alertness, concentration, aggression and motivation, among other behaviors. Norepinephrine is made in the brain from the amino acid phenylalanine.
