[Oxygen tension in the brain cortex arterioles during spontaneous respiration with the hypoxic gas mixture in rats].
Hypoxic exposure of Wistar rats resulted in sharp fall of the blood oxygen saturation on 1st-5th branching order arterioles. The increased oxygen extraction at hypoxia is due to an intensive diffusion of the oxygen through the walls of the arterioles and a lowered blood flow in the brain microvessels. Permeability of the arterioles' walls for oxygen plays a negative role as it lowers the oxygen tension in the blood entering the capillaries.
Pavlov Institute of Physiology of the Russian Acad. Sci., St. Petersburg, Russia.
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EP
Vovenko
I B
IB
Sokolova
D000818:Animals; D001160:Arterioles; D001921:Brain / Q000098:blood supply*; D000860:Hypoxia / Q000503:physiopathology*; D008297:Male; D010100:Oxygen / Q000097:blood; D010313:Partial Pressure; D051381:Rats; D017208:Rats, Wistar; D012119:Respiration
D010100:Oxygen
Napriazhenie kisloroda na arteriolakh kory golovnogo mozga krysy pri spontannom dykhanii gipoksicheskoĭ gazovoĭ smes'iu.