smoking

• What causes emphysema?

  Tar in cigarette smoke
• What part of the lungs does chronic bronchitis affect?

  Bronchioles
• What causes chronic bronchitis?

  Tar in cigarette smoke
• What can build up in the lungs due to chronic bronchitis?

  Bacteria
• What is a major risk factor for lung cancer?

  Tar in cigarette smoke
• How does smoking affect cancer risk?

  It increases the risk of cancer
• What is lung cancer commonly caused by?

  Smoking or passive smoking
• What is cancer characterized by?

  Abnormal growth of cells
• What forms as a result of cancer?

  A tumour
• What does carbon monoxide bind to in the body?

  Haemoglobin in red blood cells
• What is the effect of carbon monoxide on oxygen transport?

  Prevents red blood cells from carrying oxygen
• What is a consequence of carbon monoxide poisoning?

  Red blood cells can carry less oxygen
• What does tar damage in coronary heart disease?

  The wall of arteries
• What is the effect of fatty plaque on arteries?

  Narrows the arteries
• What happens to the heart muscle due to less oxygen?

  It cannot respire and dies
• What is the addictive substance in cigarettes?

  Nicotine
• Why is smoking considered addictive?

  Because of the chemical nicotine