Multiple choice Which of the following is a group of neurotransmitter chemicals? Somatostatin, serotonin, acetylcholine Nor-adrenaline, somatostatin, threonine Glycine, dopamine, melatonin Acetylcholine, nor-adrenaline, dopamine Reveal answer Fill a bubble to check yourself D Correct answer Explanation Acetylcholine, nor-adrenaline, and dopamine are well-known neurotransmitters used in the nervous system to transmit signals across synapses.