Item BF044005: Most oxygen molecules move from the lungs to the blood by entering capillaries.

Which of the following statements is TRUE about the movement of oxygen molecules between the lungs and cells of the body?

  1. Most oxygen molecules move from the lungs to cells of the body by entering microscopically small blood vessels (capillaries) and then moving to cells through the circulatory system.
  2. Most oxygen molecules move from cells of the body to the lungs by moving through the circulatory system and then leaving the circulatory system by way of capillaries at the lungs.
  3. Most oxygen molecules move from the lungs to the heart by way of special respiratory tubes where the oxygen molecules mix with the blood.  Blood then moves to cells of the body by way of the circulatory system.
  4. Oxygen molecules enter and leave the body by way of lungs, but they do not move between the lungs and the blood.
Distribution of Responses
Distribution of Responses
Chart showing distrubtion of responses for Item BF044005
Students Responding Correctly
Group Correct Total Percent
Overall 1404 4739 30%
Grades
  6–8 836 2873 29%
  9–12 563 1847 30%
Gender
  Male727228232%
  Female650237827%
Primary Language
  English1270425430%
  Other10737429%

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