Calcium requirement for the alpha-action of catecholamines on guinea-pig taenia coli.
D000818:Animals; D002118:Calcium / Q000494:pharmacology*; D002395:Catecholamines / Q000494:pharmacology*; D004553:Electric Conductivity; D006168:Guinea Pigs; D066298:In Vitro Techniques; D008274:Magnesium / Q000494:pharmacology; D008564:Membrane Potentials / Q000187:drug effects*; D009130:Muscle, Smooth / Q000187:drug effects; D011942:Receptors, Adrenergic, alpha / Q000187:drug effects
D002395:Catecholamines; D011942:Receptors, Adrenergic, alpha; D008274:Magnesium; D002118:Calcium