Biology 9700 · AS & A Level · The circulatory system

The circulatory system — practice question

How do carbon monoxide and nicotine affect the cardiovascular system?

  • Acarbon monoxide: combines with haemoglobin; nicotine: increases blood pressure
  • Bcarbon monoxide: combines with haemoglobin; nicotine: reduces heart rate
  • Ccarbon monoxide: reduces blood pressure; nicotine: increases heart rate
  • Dcarbon monoxide: reduces heart rate; nicotine: combines with haemoglobin

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