peptide neurotransmitters are often released group of answer choices shortly after their synthesis in presynaptic terminals. as pre-propeptides. as propeptides. more readily and quickly than nonpeptide transmitters. together with small-molecule transmitters.

Many peptides known as hormones also function as peptide neurotransmitters, and they are often released along with small-molecule neurotransmitters.
The biological activity of peptide neurotransmitters depends on their amino acid sequence.
Some peptide Neurotransmitters: Acetylcholine, dopamine, serotonin and histamine are neurotransmitters. There are over known neuropeptides, representing the largest and most diverse class of signaling molecules in the nervous system.
Neuropeptides are synthesized from large precursor proteins, cleaved and post-translationally processed before being packaged into dense-core vesicles.
Four neurotransmitters fall into the biogenic amine chemical class. These are adrenaline, norepinephrine, dopamine and serotonin.

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