Relationship between duration of contraction and relaxation in smooth muscle of the small intestine.
D000818:Animals; D001285:Atropine / Q000494:pharmacology; D002217:Carbachol / Q000494:pharmacology; D004285:Dogs; D005769:Gastrointestinal Motility / Q000187:drug effects*; D066298:In Vitro Techniques; D007421:Intestine, Small / Q000502:physiology*; D009119:Muscle Contraction / Q000187:drug effects*; D009130:Muscle, Smooth / Q000502:physiology*