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- Exercise can trigger symptoms of AMS due to which of the following? low partial pressure of oxygen low atmospheric pressure abnormal neural signals small venous reserve of oxygenWhich of the following prevents the alveoli from collapsing? residual volume tidal volume expiratory reserve volume inspiratory reserve volumeAt rest, the normal pleural pressure change during quiet breathing is about A. 0-2 mm Hg. B. 2-4 mm Hg. C. 4-6 mm Hg. D. 6-8 mm Hg.
- Suppression of the peripheral chemoreceptors begins when the Po2 falls below A. 50 mm Hg B. 40 mm Hg C. 30 mm Hg D. 20 mm HgThe pressure difference between the intra-alveolar and intrapleural pressures is called ________. atmospheric pressure pulmonary pressure negative pressure trans pulmonary pressureThe total lung capacity is calculated using which of the following formulas? residual volume + tidal volume + inspiratory reserve volume residual volume + expiratory reserve volume + inspiratory reserve volume expiratory reserve volume + tidal volume + inspiratory reserve volume residual volume + expiratory reserve volume + tidal volume + inspiratory reserve volume
- When ventilation is not sufficient, which of the following occurs? The capillary constricts. The capillary dilates. The partial pressure of oxygen in the affected alveolus increases. The bronchioles dilate.The average compliance of the lungs and chest wall combined is 0.1 L/cm H2O. 0.2 L/cm H2O 0.3 L/cm H2O 0.4 L/cm H2OWhich of the following forced expiratory measurements reflects the status of medium-sized to small-sized airways? A. FEF200-1200 B. PEFR C. MVV D. FEF25%-75%
- The peripheral chemoreceptors are significantly activated when the PO2 decreases to about A. 75 mm Hg B. 70 mm Hg C. 65 mm Hg D. 60 mm HgThe mean intraluminal pressure in the pulmonary capillaries is A. 5 mm Hg B. 10 mm Hg C. 15 mm Hg D. 20 mm HgThe volume of air that can be exhaled after a normal tidal volume exhalation is the IRV FRC FVC ERV