This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Anatomy
[{'content': 'The amino acid which on decarboxylation gives rise to a product with potent vasodilator propeies is \nSelect and explain. \nA. Histidine, B. Arginine, C. Glutamate, D. Aspaate', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Neurotransmitters obtained from amino acids Amino acidNeurotransmitterNature/FunctionGlutamateGABAInhibitory neurotransmitterHistidineHistaminePotent vasodilator, bronchospasm, stimulates gastric acid secretionTyrosineTyramine, Epinephrine, Norepinephrine, Dopamine, DOPATryptophan5-hydroxytryptamine (Serotonin)Regulation of pleasures related to motivation & emotional arousal. Regulate appetite, sleep, memory and learning, temperature, mood. MelatoninConnected with sleep-wake cycle and biological rhythm. Blocks MSH and ACTH secretions CysteineTaurineInhibitory neurotransmitterGlycineGlycineInhibitory neurotransmitterGlutamateGlutamateExcitatory neurotransmitterAspaateAspaateExcitatory/Inhibitory neurotransmitterArginineNitric oxideVasodilator', 'role': 'assistant'}]