AQA GCSE Biology

Revision Notes

2.4.3 Lifestyle & Non-Communicable Diseases

Risk Factors

  • Risk factors are linked to an increased rate of a disease; but exposure to a risk factor doesn’t guarantee that an individual will suffer a disease (a person who smokes regularly isn’t guaranteed to develop lung cancer but their risk compared to someone who doesn’t smoke is much, much higher)
  • Certain risk factors correlate with certain diseases (are related to them); but correlations are not always causations
  • Risk factors can be:
    • Aspects of a person’s lifestyle; such as the food they eat or whether or not they drink alcohol
    • Substances in the person’s body or environment; such as air pollution in a crowded city or asbestos in old buildings

Causal Mechanisms & Risk Factors

  • A causal mechanism has been proven for some risk factors, but not in others

Risk factors & causal mechanisms table

Lifestyle & Non-Communicable Diseases (1), downloadable IGCSE & GCSE Biology revision notes

  • Many diseases are caused by the interaction of a number of factors; the chance of developing cardiovascular disease is higher in individuals who have a poor diet high in cholesterol (fat), don’t exercise regularly and smoke – because all of these behaviours increase the likelihood of damage occurring to the arteries

Author: Jenna

Jenna studied at Cardiff University before training to become a science teacher at the University of Bath specialising in Biology (although she loves teaching all three sciences at GCSE level!). Teaching is her passion, and with 10 years experience teaching across a wide range of specifications – from GCSE and A Level Biology in the UK to IGCSE and IB Biology internationally – she knows what is required to pass those Biology exams.
Close

Join Save My Exams

Download all our Revision Notes as PDFs

Try a Free Sample of our revision notes as a printable PDF.

Join Now