A doctor reviews the effects of two treatments, P and Q, on patients with a severely narrowed coronary artery. One treatment involved inserting a stent and the other involved taking a statin.
| Treatment | Time after treatment | Blood flow through the affected coronary artery before treatment (cm3 min−1\text{cm}^3\text{ min}^{-1}cm3 min−1) | Blood flow through the affected coronary artery after treatment (cm3 min−1\text{cm}^3\text{ min}^{-1}cm3 min−1) | Blood cholesterol before treatment (mmol dm−3\text{mmol dm}^{-3}mmol dm−3) | Blood cholesterol after treatment (mmol dm−3\text{mmol dm}^{-3}mmol dm−3) |
|---|---|---|---|---|---|
| P | 1 day | 58 | 126 | 6.4 | 6.4 |
| Q | 12 weeks | 61 | 61 | 6.5 | 4.8 |
Suggest which treatment involved inserting a stent. Explain why a person with a severe narrowing might be given both treatments.
102 exam-style questions on Edexcel GCSE Biology 5.4 Non-communicable diseases, covering 5.4.1 Interaction of factors in non-communicable disease, 5.4.2 Lifestyle factors and non-communicable disease, and 5.4.3 Treatments for cardiovascular disease. Each one has a worked solution and a mark scheme showing where the marks go.