MCQ
Tobacco smoke contains carbon monoxide, which:
- AReduces the oxygen-carrying capacity of blood.
- BCauses gastric ulcers.
- CRaises blood pressure.
- DIs carcinogenic.
✓
Answer
- Reduces the oxygen-carrying capacity of blood.
Explanation:
Tobacco smoke ha 2-6% CO.The inhaled concentration is 400 ppm.
The gas combines with haemoglobin and forms an stable complex called carboxyhaemoglobin (COHb), thus reducing the concentration of haem bound oxygen.This causes oxygen deficiency in body.
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