Breathing During Exercise: Demands, Regulation, Limitations

摘要: In humans alveolar ventilation (VA) is adjusted almost perfectly to the metabolic demands of mild and moderate exercise. For example, in exercise transitions steady state, PaCO2 rarely deviates by more than 1 3 mmHg from value at rest. This near-homeostasis contrasts most other mammaliam species; equines for demonstrate a progressive hypocapnia alkalosis as intensity increased levels. equines, control systems seem programmed specific hyperventilation that contributes maintenance PaO2 homeostasis. Generally, during heavy all species hyperventilate creating hypocapnia, PAO2, widened A-a O2 gradient,