Alterations along the Hypothalamic-Pituitary-Thyroid Axis of the Zebrafish (Danio rerio) after Exposure to Propylthiouracil

Figure 8

Pituitary surface areas of zebrafish (Danio rerio) after exposure to 0, 2.5, 10, 25, and 50 mg/L PTU. Measurements were performed with 60 animals after 35 days of exposure. Asterisks indicate significant differences between exposure and control groups (^∗𝑃<0.05,^∗∗𝑃<0.01, ^∗∗∗𝑃<0.001; Dunn’s test).