Biology 9700 · AS & A Level · The gas exchange system

The gas exchange system — practice question

Some effects of smoking are shown below. Which components of tobacco smoke are responsible for these effects?

  • Atar: 1, 3 and 4; carbon monoxide: 2; nicotine: 4 and 5
  • Btar: 1, 4 and 5; carbon monoxide: 3; nicotine: 2
  • Ctar: 1 and 5; carbon monoxide: 3 and 5; nicotine: 4
  • Dtar: 3 and 4; carbon monoxide: 1, 2 and 5; nicotine: 2 and 4

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