Figure 4. Effect of acute and chronic physical and psychological stresses on liver CAT activity in control and stressed rats. Control (C), physical (Ph) and psychological (Ps) stresses. Values are expressed as mean ± SEM of 12 rats. *p<0.05 and **p<0.01 vs. day 1 in the control group; ^#P<0.05 vs. day 30 in the same group.