Item BF092004: 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 BF092004
Students Responding Correctly
Group Correct Total Percent
Overall 777 1689 46%
Grades
  6–8 413 987 42%
  9–12 362 698 52%
Gender
  Male39981449%
  Female37185144%
Primary Language
  English711150547%
  Other5314636%

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