2020 · Paper 1 · Question 6 · 5 marks
SaveExplain why death of alveolar epithelium cells reduces gas exchange in human lungs.
Scientists grew alveolar epithelium cells and exposed the epithelium cells to different concentrations of particulate matter. They calculated the percentage of these alveolar epithelium cells that died after 24 hours of exposure to particulate matter. Their results are shown in Figure 6.
Do the data in Figure 6 show a linear relationship between concentration of particulate matter and percentage of dead cells?
Use suitable calculations to justify your answer.
Space for your calculations:
