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http://dx.doi.org/10.1021/jm00303a031 | DOI Listing |
J Pharmacol Exp Ther
October 1990
Department of Environmental Health Sciences, School of Hygiene and Public Health, The Johns Hopkins University, Baltimore, Maryland.
The response of guinea pig trachea to 5-hydroxytryptamine (serotonin; 5-HT) was investigated by studying tracheal strips suspended in organ chambers for isometric tension measurements. Serotonin concentrations of 0.1 to 10 microM produced concentration-dependent contractions, whereas at higher concentrations (10-300 microM) the agonist caused concentration-dependent relaxations.
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