[Change in the permeability of vessels in the microcirculatory bed of skeletal muscles in conditions of working hyperemia].
Permeability of m. quadriceps femoris and m. gastrocnemius mimicrocirculatory bed of albino rats was studied by fluorescent biomicroscopy at rest and under work hyperemia. Fluorescein-labeled bovine globulin (FBG) was used as an indicator of permeability alteration. Quantitative fluorescent analysis was carried out on a microspectrofluorimeter. In work hypermia the FBG concentration in the muscle exceeded such at rest by 40--45%; this evidenced an increased transendothelial transport. The results of the experiments on the measurement of FBG concentration about a single capillary suggested that the microcirculatory bed permeability increased under work hyperemia.
D000818:Animals; D002199:Capillary Permeability; D006940:Hyperemia / Q000503:physiopathology*; D008833:Microcirculation / Q000503:physiopathology; D009132:Muscles / Q000098:blood supply*; D005082:Physical Exertion; D051381:Rats
Izmenenie pronitsaemosti mikrotsirkuliatornogo rusla skeletnykh myshts v usloviiakh rabocheĭ giperemii.