Multiple Choice
The movement of O2 and CO2 between the blood in the tissue capillaries and the cells in tissues depends most directly upon
A) active transport of O2 and CO2.
B) total atmospheric (barometric) pressure differences across the cell membranes.
C) diffusion of O2 and CO2 down a concentration gradient.
D) diffusion of O2 and CO2 down a partial pressure gradient.
E) osmosis across cell membranes.
Correct Answer:
Verified
Correct Answer:
Verified
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