PATHOLOGY MCQ
BLOOD VESSELS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Your blood carries ____ to your lungs to be exhaled.
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oxygen
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carbon dioxide
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Either A or B
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None of the above
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Explanation:
Detailed explanation-1: -Once the venous blood returns to the lungs, the carbon dioxide diffuses out of the bloodstream, through the capillaries, and into the alveoli from where it is expelled, during which time oxygen simultaneously binds with hemoglobin to be carried back to the tissues.
Detailed explanation-2: -Introduction. The hemoglobin (Hb) molecule within the red blood cell (RBC) carries oxygen from the lungs to the tissues, transports carbon dioxide from tissues back to lungs, and helps maintain acid–base balance.
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