Korean Journal of Veterinary Research (대한수의학회지)
- Volume 31 Issue 2
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- Pages.171-178
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- 1991
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- 2466-1384(pISSN)
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- 2466-1392(eISSN)
Effects of catecholamines on the smooth muscle strips of the cattle oesophageal groove
소(우(牛))의 식도구 평활근 절편에 대한 catecholamine의 작용
- Cho, Je-yoel (College of Veterinary Medicine, Seoul National University) ;
- Yang, Il-suk (College of Veterinary Medicine, Seoul National University)
- Received : 1991.03.21
- Published : 1991.04.30
Abstract
Effects of catecholamines were investigated on isolated strips of the male cattle oesophageal groove. In the circular muscles of the bottom and longitudinal muscles of the lip. isometric tensions was recorded with isometric myograph in 25ml organ bath. The results were as follows: 1. The muscular activity was different in preparations from the two parts. In the longitudinal muscle from the lip, rhythmic contractions generally occurred. while in the circular muscle from the bottom they were not seen almost. 2. In the circular muscle of the bottom, the increased tone and biphasic contractions were caused by catecholamines. And these contractions were mediated through