Edexcel A Level Biology A (Salters-Nuffield)
Edexcel A Level Biology A (Salters-Nuffield) Topic 1: Risk Factors and Cardiovascular Disease Exam Questions
Free Edexcel A Level Biology A (Salters-Nuffield) exam questions on Topic 1: Risk Factors and Cardiovascular Disease, with mark schemes. Covers risk factors for CVD, interpreting data on risk and the perception of risk.
Topic 1: Risk Factors and Cardiovascular Disease exam questions
These packs of real past exam questions cover the whole of Topic 1: Lifestyle, Health and Risk, including Topic 1: Risk Factors and Cardiovascular Disease. Work through every question on this sub-topic, then mark your answers against the mark scheme.
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Edexcel A Level Biology A (SNAB) 9BN0 Flashcards (Anki & Quizlet)
Every answer is written in mark scheme wording, so you learn exactly what examiners give marks for. Use them on Anki or Quizlet, then test yourself with the questions on this page.
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About Edexcel A Level Biology A (Salters-Nuffield) Topic 1: Risk Factors and Cardiovascular Disease
This part of Topic 1 focuses on health data and risk. Data questions ask you to interpret graphs and spot correlation versus causation.
What you need to know
- Risk factors Genetics, age, sex, high blood pressure, smoking, inactivity, diet, obesity and high blood cholesterol.
- Correlation and causation A correlation does not prove a cause; a mechanism is needed.
- Interpreting studies Consider sample size, controls, repeatability and how variables were measured.
- Perception of risk People often overestimate rare dramatic risks and underestimate common lifestyle risks.
Common mistakes in Topic 1: Risk Factors and Cardiovascular Disease
- Claiming a correlation proves that a factor causes CVD.
- Not using figures from the data in the answer.
- Forgetting age and sex are risk factors that cannot be changed.
Try three Topic 1: Risk Factors and Cardiovascular Disease exam-style questions
1. Explain why a correlation between smoking and CVD does not prove smoking causes CVD. (2 marks)
Show the mark scheme answer
Other variables could be responsible for both (1); a causal link needs a mechanism or controlled evidence (1).
2. Suggest two features of a valid study into a CVD risk factor. (2 marks)
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Any two: large sample size, control of other variables such as age and sex, repeated measurements, a control group (1 each).
3. Explain how high blood pressure increases the risk of CVD. (2 marks)
Show the mark scheme answer
It damages the endothelium of arteries (1), starting atheroma formation (1).
Topic 1: Risk Factors and Cardiovascular Disease FAQs
What does this part of SNAB Topic 1 cover?
Risk factors for cardiovascular disease, interpreting data about risk and how people perceive risk.
Will I need to analyse data?
Yes. Expect graphs and tables on CVD risk.
What is the difference between correlation and causation?
Correlation shows variables change together; causation means one directly causes the other.
Revise this topic with flashcards: Edexcel A Level Biology A (SNAB) 9BN0 Flashcards, with mark scheme answers for Anki and Quizlet.
