First slide

Exchange of Gases

Question

In the human body, there is a concentration gradient for carbon dioxide

Easy

A

from tissues to blood and alveoli to blood
B

from tissues to blood and blood to alveoli
C

from blood to tissues and alveoli to blood
D

from alveoli to blood and blood to tissues

Solution

In the human body, there is a concentration gradient for carbon dioxide from tissues (45 mm Hg) to oxygenated blood (40 mm Hg) and from deoxygenated blood (45 mm Hg) to alveoli (40 mm Hg).

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