منابع مشابه
Regulation of blood vessels.
THE CARDIOVASCULAR system serves the biologic organism as a transportation and mixing system. The demalnd by the organism for this service varies in different tissues and at different times while the volume of blood in the organism tends to remain constant. The cardiovascular system fulfills its function, therefore, by varying the rate and the distribution of blood flow. Blood vessels play a ma...
متن کاملThe role of adenosine A2 receptors in regulation of pial vessels blood flow in anesthetized morphine dependent rats.
Introduction:Adenosine as a potent vasodilator has physiological role in regulation of regional cerebral blood flow (rCBF). Metod: Laser-Dِoppler flowmetry technique was used to study pial vessels blood flow responses to adenosine receptors agonists and antagonist. Male Sprague Dawley rats (250-350g) that were housed in standard conditions, were anesthetized with Urethane (1.5g/kg). Adenosine ...
متن کاملFlow regulation in multi branched models of blood vessels.
Experimental models are an important instrument for investigations of flow characteristics in blood vessels. For realistic conditions all essential branches of a vessel need to be simulated and controlled. An outflow controlling system was designed for a study on flow conditions in a cerebral aneurysm model with multi outlets. The volumetric flow varied between the outlets. The construction for...
متن کاملRole of Local Nerves and Prostaglandins in Regulation of Basal Blood Flow and Hypercapnic Vasodilatation of Cerebral Blood Vessels in the Rabbit
The mechanisms underlying cerebral vasodilatation during hypercapnia are not fully understood. To examine the role of nerves and prostaglandins in the regulation of basal blood flow and in hypercapnia-induced vasodilatation in the cerebral blood vessels of rabbit.Cerebral blood flow was measured by laser Doppler flow-meter in 18 NZW rabbits anesthetized with sodium pentobarbital. Tetrodetoxin ...
متن کاملRole of Nitric Oxide and ATP-Sensitive K+ Channels in Regulation of Basal Blood Flow and Hypercapnic Vasodilatation of Cerebral Blood Vessels in Rabbit
Background: The mechanisms underlying cerebral hypercapnic vasodilatation are not fully understood. Objective: To investigate the role of nitric oxide (NO) and ATP-sensitive potassium (KATP) channels in basal blood flow regulation and hypercapnia-induced vasodilatation in rabbit cerebral blood vessels. Methods: The change in cerebral blood flow was measured by a laser Doppler flowmeter in 18 Ne...
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ژورنال
عنوان ژورنال: Circulation
سال: 1960
ISSN: 0009-7322,1524-4539
DOI: 10.1161/01.cir.21.5.749