Most carbon dioxide is transported in the form of?
Correct answer: C. Bicarbonate ions
- A. Carboxyhemoglobin
- B. Plasma proteins
- C. Bicarbonate ions
- D. In dissolved form
Explanation
Carbon dioxide can be transported through the blood via three methods. It is dissolved directly in the blood, bound to plasma proteins or hemoglobin, or converted into bicarbonate. The majority (about 70%) of carbon dioxide is transported as part of the bicarbonate system. Carbon dioxide diffuses into red blood cells. Hence, option C is accurate.
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About Respiration
The human respiratory system includes the air passages, lungs, alveoli and breathing muscles, while gaseous exchange explains how oxygen enters blood and carbon dioxide leaves it by diffusion. The effects of smoking include damage to cilia and alveoli, reduced gas exchange, chronic bronchitis, emphysema and increased risk of lung cancer.
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