Which option is NOT listed as a neurotransmitter in the material?

Which option is NOT listed as a neurotransmitter in the material?

• A. Acetylcholine
• B. Serotonin, norepinephrine, epinephrine, dopamine and tryptamine
• C. GABA
• D. Glutamate

Answer: (A)

The idea being tested is recognizing which substances the material identifies as neurotransmitters. In the material, the listed neurotransmitters include serotonin, norepinephrine, epinephrine, dopamine, tryptamine, GABA, and glutamate. Acetylcholine is not on that list, so it’s the item that isn’t listed in the material. This matters because the question asks which one does not appear in the given list, not which one is a neurotransmitter in general. Remember that acetylcholine is a well-known neurotransmitter in other contexts (notably at neuromuscular junctions and in certain autonomic pathways), but within the scope of this material, it isn’t included. The other substances shown are indeed listed as neurotransmitters in that material.

The idea being tested is recognizing which substances the material identifies as neurotransmitters. In the material, the listed neurotransmitters include serotonin, norepinephrine, epinephrine, dopamine, tryptamine, GABA, and glutamate. Acetylcholine is not on that list, so it’s the item that isn’t listed in the material. This matters because the question asks which one does not appear in the given list, not which one is a neurotransmitter in general. Remember that acetylcholine is a well-known neurotransmitter in other contexts (notably at neuromuscular junctions and in certain autonomic pathways), but within the scope of this material, it isn’t included. The other substances shown are indeed listed as neurotransmitters in that material.