Blood analysis of a patient reveals an unusually high quantity of carboxyhaemoglobin content. Which of the following conclusions is most likely to be correct? The patient has been inhaling polluted air containing unusually high content of
Correct answer: D. Carbon monoxide.
- A. Oxygen
- B. Chloroform
- C. Carbon dioxide
- D. Carbon monoxide.
Explanation
A. The patient has been inhaling polluted air containing unusually high content of oxygen: This statement is not accurate. Inhaling air with an unusually high content of oxygen would not lead to an increased quantity of carboxyhemoglobin in the blood. Carboxyhemoglobin is formed when hemoglobin binds to carbon monoxide (CO), not oxygen. B. The patient has been inhaling polluted air containing unusually high content of chloroform:This statement is not accurate. Chloroform exposure does not lead to the formation of carboxyhemoglobin. Carboxyhemoglobin is specifically formed when hemoglobin binds to carbon monoxide (CO). C. The patient has been inhaling polluted air containing unusually high content of carbon dioxide: This statement is not accurate. Increased carbon dioxide (CO2) in the air does not lead to the formation of carboxyhemoglobin. Carboxyhemoglobin is produced when hemoglobin binds to carbon monoxide (CO), not carbon dioxide. D. The patient has been inhaling polluted air containing unusually high content of carbon monoxide (Correct Option):This statement is accurate. Carboxyhemoglobin is formed when hemoglobin in the blood binds to carbon monoxide (CO). Inhaling air with an unusually high content of carbon monoxide, often produced by the incomplete combustion of fuels, can lead to elevated levels of carboxyhemoglobin in the blood. Correct Option: D. The patient has been inhaling polluted air containing unusually high content of carbon monoxide. Summary: The correct option is D. A high quantity of carboxyhemoglobin in the blood is indicative of carbon monoxide (CO) poisoning. This occurs when the patient inhales polluted air with an unusually high content of carbon monoxide, often resulting from sources like faulty heating systems or vehicle exhaust. The other options are not related to the formation of carboxyhemoglobin.
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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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