Describe the movement of oxygen and carbon dioxide during gas exchange.
A. Oxygen diffuses out of the lungs into red blood cells and carbon dioxide diffuses out of red blood cells into the kidney nephrons.
B. Carbon dioxide diffuses out of the lungs into red blood cells and oxygen diffuses out of red blood cells and into the lungs.
C. Oxygen diffuses out of the lungs into red blood cells and carbon dioxide diffuses out of red blood cells and into the lungs.
Answer: C
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