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  • Title: Effect of splanchnic nerve stimulation on epinephrine and norepinephrine release from gastrointestinal sympathetic postganglionic endings in the frog.
    Author: Matsui H.
    Journal: Jpn J Physiol; 1992; 42(1):147-50. PubMed ID: 1625375.
    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.
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