title: Effect of splanchnic nerve stimulation on epinephrine and norepinephrine release from gastrointestinal sympathetic postganglionic endings in the frog.
abstract: Gastrointestinal vascular perfusates in bullfrogs before and after splanchnic nerve stimulation were collected and analyzed for epinephrine and norepinephrine. Catecholamine in the perfusate before stimulation was predominantly epinephrine. Upon stimulation a marked increase in epinephrine release without any significant change in norepinephrine release was observed in experiments at 8-10 degrees C as well as 16-21 degrees C, showing that in frogs epinephrine is the sympathetic neurotransmitter and that the release of epinephrine is not affected by low temperatures.
authors.affiliation: Department of Physiology, Nagasaki University School of Medicine, Japan.
authors.forename: H
authors.initials: H
authors.lastname: Matsui
mesh_terms: D000818:Animals; D004064:Digestive System / Q000294:innervation; D004558:Electric Stimulation; D004837:Epinephrine / Q000378:metabolism*; D005260:Female; D008297:Male; D009411:Nerve Endings / Q000378:metabolism; D009638:Norepinephrine / Q000378:metabolism*; D011892:Rana catesbeiana; D013153:Splanchnic Nerves / Q000502:physiology*; D013564:Sympathetic Nervous System / Q000378:metabolism
chemical_list: D009638:Norepinephrine; D004837:Epinephrine