title: Sympathetic influence on the nasal mucosa.
abstract: The tone of the resistance vessels determines the capillary flow and the tone of the capacitance vessels --the nasal patency. Lower impulse frequencies in the sympathetic nerves affect mainly the capacitance vessels, while higher frequencies affect both types of vessel. The existence of both alpha- and beta-adrenoreceptors and their distribution offer pharmacological ways to affect mainly one type of the vessels.
mesh_terms: D004558:Electric Stimulation; D006801:Humans; D007545:Isoproterenol / Q000494:pharmacology; D009297:Nasal Mucosa / Q000098:blood supply / Q000294:innervation*; D011433:Propranolol / Q000494:pharmacology; D011942:Receptors, Adrenergic, alpha / Q000187:drug effects; D011943:Receptors, Adrenergic, beta / Q000187:drug effects; D012039:Regional Blood Flow / Q000187:drug effects; D013564:Sympathetic Nervous System / Q000187:drug effects / Q000502:physiology*; D014655:Vascular Resistance / Q000187:drug effects
chemical_list: D011942:Receptors, Adrenergic, alpha; D011943:Receptors, Adrenergic, beta; D011433:Propranolol; D007545:Isoproterenol