title: [Structural and functional characteristics of arteries and veins in the common frog].
abstract: Histochemical, electron-microscopic, pharmacological and physiological studies of structural and functional features of the frog blood vessels revealed a difference in the peripheral neural apparata of different vessels as expressed by different grades of the contractile responses to exogenous substances and electrical stimulation: the better innervated a vessel the better response is mediated by the alpha-adrenoreceptors. The beta-adrenoreceptors have only been found in innervated vessels. The data obtained suggest that vessels of amphibia are in general similar to vessels of vertebrates but the species specifics associated with behaviour and environment of animals determine a number of specific features in structural-functional organization of vessels. The diversity of structure and functioning of blood vessels found in amphibia attests a differentiation of mechanisms of vessel regulation in different areas of the vascular bed.
mesh_terms: D000109:Acetylcholine / Q000494:pharmacology; D000818:Animals; D001158:Arteries / Q000502:physiology* / Q000648:ultrastructure; D002395:Catecholamines / Q000378:metabolism / Q000494:pharmacology; D004558:Electric Stimulation; D006651:Histocytochemistry; D008854:Microscopy, Electron; D009119:Muscle Contraction / Q000187:drug effects; D009131:Muscle, Smooth, Vascular / Q000187:drug effects / Q000502:physiology; D011896:Rana temporaria / Q000033:anatomy & histology / Q000502:physiology*; D014680:Veins / Q000502:physiology* / Q000648:ultrastructure
chemical_list: D002395:Catecholamines; D000109:Acetylcholine
vernacular_title: Strukturno-funktsional'naia kharakteristika aretriĭ i ven travianoĭ liagushki.