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Which one of the following air pollutants combines with the hemoglobin of human blood and reduces its oxygen-carrying capacity, leading to suffocation and may cause even death?
1) Chlorofluorocarbon
2) Fly ash
3) Carbon monoxide
4) Sulphur dioxide
3) Carbon monoxide
Carboxyhaemoglobin or carboxyhaemoglobin (symbol COHb or HbCO) is a complex of carbon monoxide and haemoglobin (Hb) that forms in red blood cells upon contact with carbon monoxide.
Carbon Monoxide inhibits body stability to distribute O2.
Haemoglobin has a higher affinity for CO.
Haemoglobin that binds CO becomes ‘poisoned’ and can no longer bind oxygen, destroying its function.