title: Responses of working rat and guinea pig hearts to carbachol.
mesh_terms: D000818:Animals; D002217:Carbachol / Q000494:pharmacology*; D002304:Cardiac Pacing, Artificial; D000242:Cyclic AMP / Q000378:metabolism; D006152:Cyclic GMP / Q000378:metabolism; D006168:Guinea Pigs; D006321:Heart / Q000187:drug effects*; D066298:In Vitro Techniques; D051381:Rats; D013045:Species Specificity
chemical_list: D002217:Carbachol; D000242:Cyclic AMP; D006152:Cyclic GMP