Which neurotransmitters comprise the primary catecholaminergic system?

Which neurotransmitters comprise the primary catecholaminergic system?

• A. Dopamine, Norepinephrine, and Epinephrine
• B. Acetylcholine
• C. Serotonin
• D. Glutamate

Answer: (A)

Catecholamines are neurotransmitters that share a catechol group on their benzene ring and a basic amine group, and they are all derived from the amino acid tyrosine. The primary catecholaminergic system consists of dopamine, norepinephrine, and epinephrine. Dopamine pathways are key for movement, motivation, and reward; norepinephrine modulates arousal, attention, and autonomic sympathetic activity; epinephrine mainly acts as a peripheral hormone from the adrenal medulla, with additional central roles. Other substances listed are not catecholamines: acetylcholine is cholinergic; serotonin is a monoamine derived from tryptophan; glutamate is an amino acid neurotransmitter.

Catecholamines are neurotransmitters that share a catechol group on their benzene ring and a basic amine group, and they are all derived from the amino acid tyrosine. The primary catecholaminergic system consists of dopamine, norepinephrine, and epinephrine. Dopamine pathways are key for movement, motivation, and reward; norepinephrine modulates arousal, attention, and autonomic sympathetic activity; epinephrine mainly acts as a peripheral hormone from the adrenal medulla, with additional central roles. Other substances listed are not catecholamines: acetylcholine is cholinergic; serotonin is a monoamine derived from tryptophan; glutamate is an amino acid neurotransmitter.