histopathological evaluations showed that sulfuric acid particles alone did not cause inflammatory responses in centriacinar units of rat lung parenchyma ( expressed in terms of percent lesion area ) but did cause significant damage ( cell killing followed by a wave of cell replication ) in nasal respiratory epithelium , as measured by uptake of tritiated thymidine in the dna of replicating cells .
C0007590
cell replication
C0007634
cells