What is the role of hemoglobin in respiration?
A. Hemoglobin is responsible for the production of red blood cells in the bone marrow.
B. Hemoglobin regulates blood pH levels by binding to hydrogen ions.
C. Hemoglobin absorbs carbon dioxide in the lungs and releases oxygen in the tissues.
D. Hemoglobin transports oxygen from the lungs to the body’s tissues and carries carbon dioxide back to the lungs.
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What is the function of alveoli in the lungs?
A. To produce mucus for lubrication in the lungs.
B. To filter out dust and particles from the air.
C. To store oxygen for later use.
D. The function of alveoli in the lungs is to enable gas exchange between the air and the bloodstream.
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