FIG. 2.

Changes in the levels of circulating hormones after air or ozone exposure in SHAM, DEMED, or ADREX rats. Adrenal cortex and medulla-derived hormones were measured in the serum and plasma, respectively, from rats exposed to air or ozone at both time points (1-D, 2-D), A, Adrenaline (Epinephrine), B, Noradrenaline (Norepinephrine), and C, Corticosterone. Values indicate mean ± SEM (n = 4–6/group). *Indicates ozone effect when compared with matching air group at a given time point (P ≤ .05). †Indicates surgery effect within matching exposure group at a given time point (P ≤ .05).