Gas Exchange
The respiratory centre is a complex and ill-understood structure organized into ‘sub-centres’ that are composed of several nuclei dispersed within the medulla oblongata and pons.
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Gas Exchange
Contents 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 1.10
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The Respiratory Centre ................................................................................................... Rhythmicity of the Respiratory Centre ........................................................................... The Thoracic Neural Receptors ...................................................................................... Chemoreceptors............................................................................................................... The Central Chemoreceptors and the Alpha-Stat Hypothesis......................................... Peripheral Chemoreceptors ............................................................................................. Chemoreceptors in Hypoxia............................................................................................ Response of the Respiratory Centre to Hypoxemia ........................................................ Respiration ...................................................................................................................... Partial Pressure of a Mixture of Gases ............................................................................ 1.10.1 Atmospheric Pressure ....................................................................................... 1.10.2 Gas Pressure ...................................................................................................... Partial Pressure of a Gas ................................................................................................. The Fractional Concentration of a Gas (Fgas) .................................................................. Diffusion of Gases........................................................................................................... Henry’s Law and the Solubility of a Gas in Liquid ........................................................ Inhaled Air ...................................................................................................................... The O2 Cascade ............................................................................................................... PaO2 ................................................................................................................................. The Modified Alveolar Gas Equation ............................................................................. The Determinants of the Alveolar Gas Equation ............................................................ The Respiratory Quotient (RQ) in the Alveolar Air Equation ........................................ FIO2, PAO2, PaO2 and CaO2 ............................................................................................ DO2, CaO2, SpO2, PaO2 and FIO2.................................................................................... O2 Content: An Illustrative Example...............................
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