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Carbon monoxide forms carboxyhemoglobin in human blood that may cause
  • a)
    an increase in the oxygen-carrying capacity
  • b)
    a decrease in the oxygen-carrying capacity
  • c)
    damage in the central nervous system
  • d)
    damage in the circulatory system
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
Carbon monoxide forms carboxyhemoglobin in human blood that may cause...
Carbon monoxide, when mixed with blood cells in the human body, leads to the formation of Carboxyhemoglobin which is Pink in colour. It decreases the oxygen-carrying capacity.
CO + Blood → Carboxyhemoglobin
Important Point:
  • Carbon monoxide is a toxic gas, but it is difficult for people to detect
  • Carbon monoxide is a product of incomplete combustion of organic matter
  • It is often produced by motor vehicles that run on gasoline, diesel, or other carbon-based fuels
  • Exposure at 100 ppm or greater can be dangerous to the human heart.
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Most Upvoted Answer
Carbon monoxide forms carboxyhemoglobin in human blood that may cause...
Effect of Carbon Monoxide on Human Blood

Carbon monoxide is a poisonous gas that is formed by incomplete combustion of fossil fuels. When inhaled, it binds with hemoglobin in the red blood cells to form carboxyhemoglobin. This reduces the oxygen-carrying capacity of the blood, leading to various harmful effects.

Decrease in the Oxygen-Carrying Capacity

When carbon monoxide binds with hemoglobin, it forms carboxyhemoglobin which has a higher affinity for oxygen than normal hemoglobin. This means that even if there is enough oxygen in the air, the carboxyhemoglobin will prevent the oxygen from binding to hemoglobin, leading to a decrease in the oxygen-carrying capacity of the blood. This results in the following harmful effects:

- Shortness of breath
- Headaches
- Dizziness
- Confusion
- Nausea
- Fatigue
- Weakness
- Chest pain
- Irregular heartbeat
- Loss of consciousness
- Death

Damage in the Central Nervous System

The brain is one of the organs that is most affected by carbon monoxide poisoning. The decrease in oxygen-carrying capacity of the blood can lead to a lack of oxygen in the brain, causing damage to the central nervous system. This can result in the following harmful effects:

- Memory loss
- Difficulty concentrating
- Mood changes
- Depression
- Anxiety
- Irritability
- Hallucinations
- Seizures
- Coma
- Death

Damage in the Circulatory System

The decrease in oxygen-carrying capacity of the blood can also lead to damage in the circulatory system. This can result in the following harmful effects:

- Chest pain
- Irregular heartbeat
- High blood pressure
- Low blood pressure
- Heart attack
- Stroke
- Peripheral vascular disease
- Gangrene
- Death

Conclusion

Carbon monoxide is a poisonous gas that can lead to various harmful effects when inhaled. It forms carboxyhemoglobin in human blood that reduces the oxygen-carrying capacity of the blood, leading to a decrease in oxygen supply to various organs. This can cause damage to the central nervous system and circulatory system, resulting in various harmful effects and even death.
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