As blood circulates through the tissues, _______ moves from the blood (where it is more concentrated) into the cells (where it is less concentrated).
A) carbon dioxide
B) interstitial fluid
C) water
D) oxygen

Question

Quizplus · Accepted Answer

Oxygen moves from the blood, where it is more concentrated, into the cells, where it is less concentrated. Carbon dioxide, on the other hand, moves from the cells, where it is more concentrated, into the blood, where it is less concentrated. Interstitial fluid and water may also move between the blood and cells, but they are not as directly involved in gas exchange as oxygen and carbon dioxide.

As Blood Circulates Through the Tissues, _______ Moves from the Blood