The interaction between O2 and CO2 exchange in rainbow trout during graded sustained exercise.

摘要: A quantitative analysis of O2 and CO2 transport was conducted in resting exercising rainbow trout, these data were used to quantify the magnitude coupling between exchange, vivo. The release Bohr protons during haemoglobin-oxygenation non-linear over Hb-O2 equilibrium curve trout subjected different levels sustained exercise. At low swimming speeds, when venous blood content (CvO2) high, there a small acidosis as passed through gills, indicating more released oxygenation Hb than consumed HCO3- dehydration. higher CvO2 low, significant alkalosis arterial relative blood, that fewer upon ions dehydrated CO2. Haldane coefficients (moles per mole which binds Hb), calculated from steady state mixed-venous parameters, revealed under conditions all removed gill transit stoichiometrically related uptake oxygenation. excretion decreased 100% less 40% at maximal velocity largest region for gas exchange. range saturation reduces dehydration gills greater work loads elevating P(CO2) levels, leading an increase buffer capacity tissues.