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Question
Which of the following is true?
A. Blood in the pulmonary veins is low in oxygen.
B. Blood in the pulmonary veins is high in carbon dioxide.
C. The oxygen concentration of inspired air is higher than that of alveolar air.
D. All of the choices are true.
Answer
This answer is hidden. It contains 10 characters.
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A. progesterone
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arteries
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