FIG. 3.

Voltage dependence of exocytosis is similar in rostral and caudal hair cells. A Mean calcium influx Q²⁺_Ca (black symbols) and capacitance change ΔC_m (gray symbols) for both rostral (squares) and caudal (triangles) hair cells plotted as a function of depolarization voltage. ΔC_m shows a linear dependence of exocytosis on calcium for rostral (B) but not for caudal (C) hair cells. A power function [ΔC_m = A(Q²⁺_Ca)^N] was fit to the data and is shown superimposed as a dotted line (rostral—A = 0.5 ± .75; N = 1.4 ± 0.5; R² = 0.89; caudal—A = 0.02 ± 0.03; N = 2.7 ± 0.7; R² = 0.97).