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      Electrical Properties and Constants of Longitudinal Muscle from the Avian Anterior Mesenteric Artery

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          Abstract

          The electrical activity of longitudinal muscle of anterior mesenteric artery from domestic fowl was investigated with microelectrodes and in the sucrose-gap apparatus. Action potentials were recorded by both techniques. In the sucrose-gap each action potential preceded a phasic contraction and similar contractions were recorded in vivo suggesting that during life, action potentials are normally associated with the generation of tension. Measured with microelectrodes in hypertonic solution at 41 °C, the time constant of the muscle was 257 msec and the space constant 2.8 mm. The latter was unchanged when reducing the tem perature to 31 °C but the former was increased.

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          Author and article information

          Journal
          JVR
          J Vasc Res
          10.1159/issn.1018-1172
          Journal of Vascular Research
          S. Karger AG
          1018-1172
          1423-0135
          1974
          1974
          18 September 2008
          : 11
          : 1-2
          : 65-78
          Affiliations
          Department of Pharmacology, Oxford University, Oxford
          Article
          158000 Blood Vessels 1974;11:65–78
          10.1159/000158000
          © 1974 S. Karger AG, Basel

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          Page count
          Pages: 14
          Categories
          Research Paper

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