Fig. 7. (A) Caudal region of the saccular epithelium immediately after noise exposure (day 0). Arrows point to examples of TUNEL-labeled (apoptotic) cells visualized by brown DAB labeling. Scale bar, 50 µm. (B) TUNEL-labeled cells in the goldfish saccule (gray) and lagena (black) at specific days following 48 h white noise exposure. Labeled cells were counted for each whole-mount epithelium. Values are means ± s.e.m.; N=6 (controls + days 0-8); N=2 (baseline). Asterisks indicate significantly elevated cell counts relative to baseline (B) and control (C) values (P<0.05).