Hormones and Neuropeptides

Hormonal peptides are synthesized and secreted by endocrine cells into bloodstream or interstitial fluid. By binding to specific receptors, they regulate a wide range of physiological processes including metabolism, immune function, and reproduction. They are characterized by rapid onset of effect with short sustainability.
Neuropeptides are short-chain peptides produced by neurons and stored in vesicles. Acting as neurotransmitters and neuromodulators, they modulate synaptic transmission and influence functions such as pain perception, emotion, appetite, etc.