Biology 9700 · AS & A Level · The circulatory system
The circulatory system — practice question
The leaves of tobacco plants, Nicotiana spp, contain a high nicotine concentration, which is the addictive part of tobacco smoke. Scientists are continually searching for methods to breed tobacco plants with a lower nicotine content.
(a)[4]
Describe and explain the effects of nicotine on the cardiovascular system that can lead to a person developing coronary heart disease.
(b)[1]
The idea that making low-nicotine cigarettes and cigars could reduce the harmful effects of smoking is being considered. Explain whether or not you agree with this statement.
Worked solution & mark scheme
This 5-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Platelets become sticky, causing blood clots in coronary arteries” …