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Item BF089002: Both oxygen molecules and carbon dioxide molecules move between the lungs and the blood through the walls of capillaries.

How does the functioning of the lungs affect the amount of oxygen and carbon dioxide in the blood?

  1. The lungs help increase the amount of oxygen and the amount of carbon dioxide in
    the blood.
  2. The lungs help increase the amount of oxygen and reduce the amount of carbon dioxide in the blood.
  3. The lungs help increase the amount of carbon dioxide and reduce the amount of oxygen in the blood.
  4. The lungs help reduce the amount of carbon dioxide and the amount of oxygen in
    the blood.
Distribution of responses
Answer Choice
Overall
Grades
Gender
Primary Language
 
n = 3016
6–8
n = 1857
9–12
n = 1144
Male
n = 1446
Female
n = 1514
English
n = 2728
Other
n = 218
A. 19% 20% 17% 20% 17% 18% 23%
B. 58% 54% 64% 56% 61% 60% 45%
C. 13% 14% 11% 13% 13% 13% 16%
D. 10% 12% 8% 10% 10% 9% 16%