How does CPAP improve oxygenation and ventilation in patients with certain respiratory problems?
A. It forces the alveoli open and pushes more oxygen across the alveolar membrane.
B. It pushes thick, infected pulmonary secretions into isolated areas of the lung tissue.
C. It decreases intrathoracic pressure, which allows more room for the lungs to expand.
D. It prevents alveolar collapse by pushing air into the lungs during the inhalation phase.
Answer: A. It forces the alveoli open and pushes more oxygen across the alveolar membrane.
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