During gas exchange at the lungs, oxygen ____.
A)moves against its partial pressure gradient
B)from the blood into the alveoli
C)moves from the external to internal environment
D)moves in the same direction as carbon dioxide
E)moves out of the blood

Question

During gas exchange at the lungs, oxygen ____. ​
A)moves against its partial pressure gradient
B)from the blood into the alveoli
C)moves from the external to internal environment
D)moves in the same direction as carbon dioxide
E)moves out of the blood ​

Quizplus · Accepted Answer

Oxygen moves from the external environment (the air in the alveoli) into the internal environment (the blood) during gas exchange at the lungs, following its partial pressure gradient.

During Gas Exchange at the Lungs, Oxygen ____