In external respiration, the PO2 in the alveoli is ____________________, and the PO2 in the surrounding blood is ____________________.
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Q176: Pulmonary surfactant permits normal inhalation because it
Q177: During inhalation, the chest cavity is expanded
Q178: All of the structures and substances through
Q179: The bronchioles can constrict or dilate because
Q180: Normal inflation of alveoli is possible because
Q182: In internal respiration, carbon dioxide diffuses from
Q183: In external respiration, carbon dioxide diffuses from
Q184: In external respiration, the PCO2 in the
Q185: In internal respiration, the PCO2 in the
Q186: The muscles that bring about inhalation are
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