Which of these statements could describe the effect of carbon monoxide in cigarette smoke?
1) It binds irreversibly to haemoglobin.
2) It causes mucus to accumulate in the bronchioles.
3) It results in more carbon dioxide being transported in the blood.
4) It temporarily increases the heart rate.
1 )
1 and 2
1 only
3 )
2 and 3
4 )
3 and 4
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