Fig. (8) Protective effect of the antioxidant compounds on PQ-induced changes in the activity of AChE. Exposure to multiple-dose of PQ increased the activity of AChE in males A) and females (B) 556 whereas antioxidant compounds (4-Hydroxyisophthalic acid-DHA-I, Nicotinamide-NA, Ellagic Acid-EA, Quercetin-Que) significantly restored these changes. Values are mean±S.E. and bars denoted by identical lowercase alphabets (a–c) indicate no significant difference, whereas, values 559 denoted by different alphabets indicate a statistically significant difference (p<0.05).