Conduction of excitation from the sinus node to the atrioventricular node.
D000109:Acetylcholine / Q000494:pharmacology; D000200:Action Potentials; D000818:Animals; D004594:Electrophysiology; D000882:Haplorhini; D006325:Heart Atria; D006329:Heart Conduction System / Q000033:anatomy & histology / Q000502:physiology*; D008854:Microscopy, Electron; D011817:Rabbits
D000109:Acetylcholine