[Actions of perfusates lacking Na on the circular muscle of the guinea pig stomach].
D000818:Animals; D002118:Calcium / Q000494:pharmacology; D006168:Guinea Pigs; D066298:In Vitro Techniques; D008564:Membrane Potentials; D012964:Sodium / Q000494:pharmacology*; D013270:Stomach / Q000502:physiology*
D012964:Sodium; D002118:Calcium