Sam smokes and has high blood pressure. Lee has high blood pressure but does not smoke.
Explain why Sam has a greater risk of cardiovascular disease than Lee, and how Sam's risk would change if he stopped smoking.
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.