Respiration and Circulation — BIOLOGY STD 12 Science — Question
Maharashtra BoardEnglish MediumSTD 12 ScienceBIOLOGYRespiration and Circulation4 Marks
Question
Carbon monoxide poisoning.
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Answer
Carbon monoxide poisoning is caused when carbon monoxide is combined with haemoglobin.
Haemoglobin is said to have 250 times more affinity for carbon monoxide than that for the oxygen.
Therefore, haemoglobin with carbon monoxide forms a stable compound, the carboxyhemoglobin.
Due to the formation of carboxyhaemoglobin, the haemoglobin no longer carries oxygen to the cells and tissues. Tissues then suffer from oxygen starvation. This leads to asphyxiation and in extreme cases it leads to death.
Carbon monoxide poisoning occurs in closed rooms with incompletely burning substances such as stove burners or furnaces and garages having running automobile engines.
Person suffering from carbon monoxide poisoning has to be administered with oxygen-carbon dioxide mixture, so that high levels of CO2 makes carbon monoxide dissociated from haemoglobin.
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