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9 marksRespiration

CSEC Biology · May/June 2008 · Paper 2 · Question 5(a)(i)

With the aid of a fully annotated diagram, explain how air reaches the lungs and oxygen is absorbed into the blood stream.

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Other parts of this question

  1. 5(a)(ii)Suggest why it is important for human blood to have a specialised type of cell for oxygen absorption.[9 marks]
  2. 5(b)The effect of smoke emission from factories on plant leaves is sometimes compared to the effect of cigarette smoke on human lungs. Suggest TWO reasons why this…[4 marks]
  3. 5(c)Many governments have passed legislation to reduce the amount of cigarette smoking in public. Explain why governments should consider it their responsibility…[2 marks]

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