Figure 5.

Stimulated secretory activity after 25 days of exposure to 5, 10, 20, 40 ppm SO2 or fresh air and 20 days exposure to 80 ppm SO2. The acetylcholine-stimulated secretory activity of rat tracheas (for each group n = 4) was assessed by the modified Ussing Chamber technique. Results are presented as mean ± SD cpm. ** indicates p < 0.01

Wagner et al. Journal of Occupational Medicine and Toxicology 2006 1:12   doi:10.1186/1745-6673-1-12
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