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Biology: The Unity and Diversity o...
Biology: The Unity and Diversity o...
________ binds to hemoglobin even more strongly than oxygen does.
- a. Carbon dioxide
- b. Carbon monoxide
- c. Oxyhemoglobin
- d. Nitrogen
Concept introduction: Carbon monoxide (CO) is a colorless, odorless gas that is released when the organic material burns. Carbon monoxide poisoning is the most common type of fatal inhalation poisoning in the United States and worldwide. When CO is present in the body, the blood holds more less oxygen and releases of little of what it does hold to tissues.
Reasons for correct answer:
The inhaled carbon monoxide exerts its adverse effect by interfering with gas exchange. Carbon monoxide binds to hemoglobin to form carboxyhemoglobin. Hemoglobin has very high affinity for CO. It will bind to hemoglobin 200 times more tightly than oxygen. CO blocks many oxygen-binding sites and also causes the hemoglobin to hold on to any oxygen that it binds.
Option c. is given as “Carbon monoxide”. As CO binds to hemoglobin more strongly than oxygen does, option b. is correct.
Reasons for incorrect answer:
Option a. is given as “Carbon dioxide”...
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