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Epinephrine and norepinephrine release from bullfrog gastrointestinal sympathetic postganglionic endings at a high
1Department of Physiology, Nagasaki University School of Medicine, Japan.
The Japanese Journal of Physiology
|January 1, 1992
Abstract:
The influence of a high ambient temperature on sympathetic neurotransmitter release in bullfrogs was studied. Gastrointestinal vascular perfusates were collected before and after splanchnic nerve stimulation, and their content of epinephrine and norepinephrine was determined. A marked increase in epinephrine and norepinephrine release was observed following stimulation at 29-32 degrees C, indicating that epinephrine and norepinephrine may both act as adrenergic transmitters in a high-temperature environment.