Item BF048005: Carbon dioxide in the blood decreases and oxygen increases as blood passes through the lungs. (Version using graphs to show changes in carbon dioxide and oxygen)

A person measures the levels of carbon dioxide and oxygen in the blood before and after the blood passes through the lungs.  Which of the following pairs of graphs shows the changes in carbon dioxide and the changes in oxygen in the blood before and after passing through blood vessels in the lungs?

Distribution of Responses
Chart showing distrubtion of responses for Item BF048005
Students Responding Correctly
Group Correct Total Percent
Overall 4480 9388 48%
Grades
  6–8 2667 5832 46%
  9–12 1799 3526 51%
Gender
  Male2160455747%
  Female2243465648%
Primary Language
  English4058839148%
  Other33477343%

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