At the Arterial End of the Tissue Capillaries

question 1

Multiple Choice

At the arterial end of the tissue capillaries,

• A) O2 diffuses from tissue cells into the blood, while CO2 diffuses from the blood into tissue cells.
• B) O2 diffuses from the blood into tissue cells, while CO2 diffuses from tissue cells into the blood.
• C) both O2 and CO2 diffuse from the blood into tissue cells.
• D) both O2 and CO2 diffuse from tissue cells into the blood.
• E) O2 diffuses from the blood into tissue cells, but there is no net movement of CO2.

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