... 2 2008 © The Company of Biologists Limited 2008 2008 metamorphosis development amphibian Xenopus laevis 5-HT nitric oxide adenosine UTP ATP purinergic During amphibian metamorphosis, the gastrointestinal tract is subject to dramatic changes as the herbivorous tadpole...

... being more potent. The bradycardia was blocked by aminophylline and CPT, demonstrating an involvement of A 1 receptors in this response. 17 05 1999 09 08 1999 © 1999 by Company of Biologists 1999 teleost Pagothenia borchgrevinki purinergic circulation gill heart blood...

... that the cyclic nucleotides acted intracellularly in some capacity. Receptors of the ‘purinergic’ type appeared not to be major contributors to fluid secretion; of three purinergic agonists tried, adenosine, adenosine 5′-monophosphate (AMP) and adenosine 5′-triphosphate (ATP), only adenosine had an effect...