Average slope of the linear component of endocytosis for 20 ms and 200 ms depolarizing pulses, obtained from fitting Cm-data for 20 s after cessation of the 20 ms depolarizations or for the last 10 s of the Cm- recording for 200 ms depolarizations. (*p < 0.05; one-way ANOVA with post-hoc Tukey's or non-parametric K-W with post-hoc Dunn's). 