title: Autonomic nervous control of cardiac frequency in the exercise-trained rat.
mesh_terms: D000818:Animals; D001285:Atropine / Q000494:pharmacology; D006339:Heart Rate / Q000187:drug effects; D008297:Male; D010275:Parasympathetic Nervous System / Q000502:physiology*; D005082:Physical Exertion; D011433:Propranolol / Q000494:pharmacology; D051381:Rats; D013564:Sympathetic Nervous System / Q000502:physiology*
chemical_list: D001285:Atropine; D011433:Propranolol