View the animation below, then complete the quiz to test your knowledge of the concept.
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1 | At the arterial ends of the pulmonary capillaries... |
![](/olcweb/styles/shared/spacer.gif) | A)![](/olcweb/styles/shared/spacer.gif) | the Po2 is higher in the capillaries than in the alveoli. |
![](/olcweb/styles/shared/spacer.gif) | B)![](/olcweb/styles/shared/spacer.gif) | the Po2 is lower in the capillaries than in the alveoli. |
![](/olcweb/styles/shared/spacer.gif) | C)![](/olcweb/styles/shared/spacer.gif) | the Po2 is equal in the capillaries and in the alveoli. |
![](/olcweb/styles/shared/spacer.gif) | D)![](/olcweb/styles/shared/spacer.gif) | the Po2 is higher at first in the capillaries than in the alveoli, and then it is lower in the alveoli than in the capillaries. |
![](/olcweb/styles/shared/spacer.gif) | E)![](/olcweb/styles/shared/spacer.gif) | the Po2 is lower at first in the capillaries than in the alveoli, and then it is higher in the alveoli than in the capillaries. |
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2 | At the venous ends of the pulmonary capillaries... |
![](/olcweb/styles/shared/spacer.gif) | A)![](/olcweb/styles/shared/spacer.gif) | the Pco2 is higher in the capillaries than in the alveoli. |
![](/olcweb/styles/shared/spacer.gif) | B)![](/olcweb/styles/shared/spacer.gif) | the Pco2 is lower in the capillaries than in the alveoli. |
![](/olcweb/styles/shared/spacer.gif) | C)![](/olcweb/styles/shared/spacer.gif) | the Pco2 is equal in the capillaries and in the alveoli. |
![](/olcweb/styles/shared/spacer.gif) | D)![](/olcweb/styles/shared/spacer.gif) | the Pco2 is higher at first in the capillaries than in the alveoli, and then it is lower in the alveoli than in the capillaries. |
![](/olcweb/styles/shared/spacer.gif) | E)![](/olcweb/styles/shared/spacer.gif) | the Pco2 is lower at first in the capillaries than in the alveoli, and then it is higher in the alveoli than in the capillaries. |
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3 | The ranking from highest to lowest Po2 in the area of the arterial ends of the tissue capillaries is... |
![](/olcweb/styles/shared/spacer.gif) | A)![](/olcweb/styles/shared/spacer.gif) | capillaries, tissue fluid, cells. |
![](/olcweb/styles/shared/spacer.gif) | B)![](/olcweb/styles/shared/spacer.gif) | cells, tissue fluid, capillaries. |
![](/olcweb/styles/shared/spacer.gif) | C)![](/olcweb/styles/shared/spacer.gif) | cells, capillaries, tissue fluid. |
![](/olcweb/styles/shared/spacer.gif) | D)![](/olcweb/styles/shared/spacer.gif) | tissue fluid, capillaries, cells. |
![](/olcweb/styles/shared/spacer.gif) | E)![](/olcweb/styles/shared/spacer.gif) | all three are equal. |
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4 | When partial pressures for a given gas are equal between the capillaries and the tissue fluids, no net movement of that gas occurs. |
![](/olcweb/styles/shared/spacer.gif) | A)![](/olcweb/styles/shared/spacer.gif) | True |
![](/olcweb/styles/shared/spacer.gif) | B)![](/olcweb/styles/shared/spacer.gif) | False |
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5 | Gasses diffuse because of differences in partial pressures from areas of higher pressure to areas of lower pressure. |
![](/olcweb/styles/shared/spacer.gif) | A)![](/olcweb/styles/shared/spacer.gif) | True |
![](/olcweb/styles/shared/spacer.gif) | B)![](/olcweb/styles/shared/spacer.gif) | False |