Final answer:
Neurotransmitters can be categorized into amino acids and the cholinergic system. Examples include glutamate and acetylcholine.
Step-by-step explanation:
The categories of neurotransmitters include amino acids and the cholinergic system.
An example of an amino acid neurotransmitter is glutamate (Glu), which is part of the glutamatergic system.
An example of a cholinergic neurotransmitter is acetylcholine, which is part of the cholinergic system.These neurotransmitters include dopamine, serotonin, and norepinephrine, each involved in various brain functions including mood regulation, arousal, and reward systems. Substance P and endorphins are also part of this category and play roles in pain perception and analgesia, respectively.
These categories of neurotransmitters each have their own systems, specific receptors, and methods of removal from the synaptic cleft.