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
1.11 1.12 1.13 1.14 1.15 1.16 1.17 1.18 1.19 1.20 1.21 1.22 1.23 1.24 1.25 1.26 1.27 1.28 1.29 1.30 1.31 1.32 1.33
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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