title: Gradients of contractions in the opossum esophagus.
mesh_terms: D000818:Animals; D004558:Electric Stimulation; D004947:Esophagus / Q000502:physiology*; D066298:In Vitro Techniques; D009119:Muscle Contraction / Q000187:drug effects*; D009130:Muscle, Smooth / Q000187:drug effects / Q000502:physiology; D009893:Opossums; D011189:Potassium Chloride / Q000494:pharmacology; D013997:Time Factors
chemical_list: D011189:Potassium Chloride