( ( ( Toxic effects ) ( on ( epithelial ( cell ( ( metabolism and ) ultrastructure ) ) ) ) ) ( ( ( include ( depressed ( cellular ( ( respiration and ) glycolysis ) ) ) ) ( with ( lactic ( acid accumulation ) ) ) ) ; ) )
(ROOT (S (NP (NP (JJ Toxic) (NNS effects)) (PP (IN on) (NP (JJ epithelial) (NN cell) (NN metabolism) (CC and) (NN ultrastructure)))) (VP (VBP include) (NP (JJ depressed) (JJ cellular) (NN respiration) (CC and) (NNS glycolysis)) (PP (IN with) (NP (JJ lactic) (JJ acid) (NN accumulation)))) (: ;)))
Toxic effects on epithelial cell metabolism and ultrastructure include depressed cellular respiration and glycolysis with lactic acid accumulation;
(ROOT (S (NP (NNS Glycolysis)) (VP (VBZ is) (NP (NP (DT the) (JJ first) (NN stage)) (PP (IN of) (NP (JJ cellular) (NN respiration))))) (. .)))