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Gas exchange

Gas exchange

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Question 4

In an epidemiological study of asbestosis (a chronic lung disease that severely impairs gas exchange by causing progressive scarring of the alveoli), the following statistics were reported for a specific industrial region:

  • 74% of all individuals who develop asbestosis were employed in the shipbuilding or construction industries before 1980.
  • 34,800 34,800\,34,800 people have been formally diagnosed with asbestosis.
  • It is estimated that an additional 18,200 18,200\,18,200 people in the region have asbestosis but remain undiagnosed.

Calculate the total number of people in this region who are estimated to have asbestosis (both diagnosed and undiagnosed) and were employed in the shipbuilding or construction industries before 1980. Show your working.

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Markscheme

Gas exchange Questions

  1. IGCSE
  2. /Biology
  3. /Gas exchange

16 exam-style questions on Edexcel IGCSE Biology Gas exchange. Each one has a worked solution and a mark scheme showing where the marks go.

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