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1.4 Gas exchange  (Page 8/17)

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8 / 17  The partial pressure of carbon dioxide is 45 mm Hg in the blood and 40 mm Hg in the alveoli. What happens to the carbon dioxide?
A  It diffuses into the blood.
B  It diffuses into the alveoli.
C  The gradient is too small for carbon dioxide to diffuse.
D  It decomposes into carbon and oxygen.
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Practice MCQ 4 FlashCards 2 Key Terms 7

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Source:  OpenStax, Anatomy & Physiology: energy, maintenance and environmental exchange. OpenStax CNX. Aug 21, 2014 Download for free at https://legacy.cnx.org/content/col11701/1.1
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