Abstract
It has been reported that stimulation of either α or β-adrenergic receptors produces relaxation of the canine ileum, mouse ileum, rat duodenum, human ileum, and human colon (1-6). On the other hand, it has been found that adrenaline contracts the terminal portion of the guinea-pig ileum (7-9). Chrusciel and Pojda (10) reported a triphasic intestinal response to adrenaline in the rat, which consisted of an initial relaxation and a secondary increase in the tone followed by a third relaxation.
The present work was undertaken to study the effect of stimulation of α and β-adrenergic receptors on the rat jejunum.
