title: [Studies on ejaculation. 6. Receptor mechanism of closure of internal urethral orifice during ejaculation].
mesh_terms: D000818:Animals; D001337:Autonomic Agents / Q000494:pharmacology; D004285:Dogs; D004542:Ejaculation; D008297:Male; D011941:Receptors, Adrenergic; D014521:Urethra / Q000187:drug effects / Q000502:physiology*
chemical_list: D001337:Autonomic Agents; D011941:Receptors, Adrenergic