Epinephrine and norepinephrine release from bullfrog gastrointestinal sympathetic postganglionic endings at a high ambient temperature.
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.
Matsui
H
H
Department of Physiology, Nagasaki University School of Medicine, Japan.
D000818:Animals; D004064:Digestive System / Q000294:innervation*; D004837:Epinephrine / Q000378:metabolism*; D005260:Female; D005728:Ganglia, Sympathetic / Q000378:metabolism*; D008297:Male; D009411:Nerve Endings / Q000378:metabolism; D009638:Norepinephrine / Q000378:metabolism*; D011892:Rana catesbeiana; D013153:Splanchnic Nerves / Q000502:physiology; D013696:Temperature
D009638:Norepinephrine; D004837:Epinephrine