Compared to air in the alveoli, blood in the pulmonary artery contains which of the following?
a. higher concentrations of oxygen and lower concentrations of carbon dioxide
b. higher concentrations of oxygen and higher concentrations of carbon dioxide
c. lower concentrations of oxygen and higher concentrations of carbon dioxide
d. lower concentrations of oxygen and lower concentrations of carbon
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Compared to air in the alveoli, blood in the pulmonary artery contains which of the following?
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