AS EDEXCEL BIOLOGY UNIT 1 NOTES - RISK FACTORS FOR CVD

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LIFESTYLE FACTORS CAN INCREASE RISK OF CVD:

  • DIET - High sat. fat diet - increased risk. Increases blood cholesterol (BC) levels - increases atheroma formation.
    • High salt diet - increases blood pressure.
  • HIGH BLOOD PRESSURE (HBP)- increased risk of damage to artery walls - increased risk atheroma formation. BP increased by excessive alcohol, smoking, stress & diet.
  • SMOKING- Carbon monoxide (CO) reduces amount of oxygen in blood - less oxygen available to tissues. No enough to heart - heart attack, & not enough to brain - stroke.
    • Nicotine makes platelets stick - increased chance of blood clots.
    • Decreases amount of antioxidants - makes cell damage more likely.
  • INACTIVITY - lack of exercise - increases blood pressure --> increased risk of CVD.
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THERE ARE ALSO FACTORS THAT ARE OUT OF YOUR CONTROL...

  • GENETICS - Some people have specific alleles - makes them more…

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