... at 100 nmol l –1 . Tyramine also activated the receptor but with much less potency than octopamine. Dopamine and serotonin had marginal effects on cAMP production. Using a series of known agonists and antagonists for octopamine receptors, we observed a rather unique pharmacological profile for CsOA2B2...

...: (1) mesohyl-mediated contraction originating from fusiform smooth muscle-like actinocytes (‘myocytes’) and (2) epidermal contraction originating in pinacocytes. No direct support exists for either hypothesis. The question of agonist–antagonist interaction in sponge contraction seems to have been...

... the first functional expression of a crustacean 5-HT 1 receptor, and show that it inhibits accumulation of cAMP. The drugs mCPP and quipazine are 5-HT 1α agonists and are ineffective at 5-HT 2β . Conversely, methiothepin and cinanserin are antagonists of 5-HT 2β but do not block 5-HT 1α . A comparison...

... antagonistic effects of ( R )-heptan-2-ol and( R,Z )-4-hepten-2-ol on E. semipurpurella , while nonan-2-one should possibly be included as a synergist in the sex pheromone blend of this species. The attraction of E. cicatricella and E. sparrmannella to compounds mixed with the pheromone blend of E...

... responses in different STG neurons that are mimicked by exogenously applied serotonin (5-HT); these responses include tonic inhibition, tonic excitation and induction of rhythmic bursting. We used pharmacological agonists and antagonists to show that these three classes of modulatory response in the STG...