title: Innervation of the upper airways.
abstract: The respiratory tract has a rich supply of autonomic nerves. Among the neurotransmitter candidates are noradrenaline, neuropeptide Y, substance P, calcitonin-gene-related peptide, gastrin-releasing peptide, acetylcholine, vasoactive intestinal polypeptide, and peptide histidine isoleucine. The fibers are distributed around blood vessels and seromucous glands, and beneath and/or within surface epithelium. The distribution suggests that the fibers may influence blood flow, glandular secretion, and epithelial functions.
mesh_terms: D000109:Acetylcholine / Q000378:metabolism / Q000502:physiology; D000818:Animals; D015740:Calcitonin Gene-Related Peptide; D002415:Cats; D006168:Guinea Pigs; D009419:Nerve Tissue Proteins / Q000378:metabolism / Q000502:physiology; D009478:Neuropeptide Y; D009638:Norepinephrine / Q000378:metabolism / Q000502:physiology; D010451:Peptide PHI; D010455:Peptides / Q000378:metabolism / Q000502:physiology; D051381:Rats; D012137:Respiratory System / Q000294:innervation*; D013373:Substance P / Q000378:metabolism / Q000502:physiology; D014660:Vasoactive Intestinal Peptide / Q000378:metabolism / Q000502:physiology
chemical_list: D009419:Nerve Tissue Proteins; D009478:Neuropeptide Y; D010451:Peptide PHI; D010455:Peptides; D013373:Substance P; D014660:Vasoactive Intestinal Peptide; D015740:Calcitonin Gene-Related Peptide; D000109:Acetylcholine; D009638:Norepinephrine