effects of smoking

Question 1

effects of smoking on circulatory system:

Answer 1

• smoking releases carbon monoxide
• carbon monoxide binds irreversibly to haemoglobin
• this means no oxygen can be transported to respiring cells

Question 2

coronary heart disease

Answer 2

• hearts blood supply gets blocked
• in coronary artery (which supplies heart muscle with blood)
• artery gets blocked by fatty deposits on wall of artery
  -> lumen gets narrower
  -> restricted blood flow -> not enough blood flow to the heart muscle cells
  -> less O2 -> less aerobic respiration -> more anaerobic respiration -> more lactic acid -> poisons heart muscle cells -> heart attack

Question 3

what increases chances of CHD

Answer 3

• smoking
• saturated fats
• obesity
• inactivity
• high blood pressure
• pressure
• stress