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Figure 3.4 : Simulation analysis of rod photoreceptor function. (A) Simulated voltage re-
sponse of a rod to increasing light intensities. (B) Actual voltage response recorded simulta-
neously with the photocurrent in (D) from an isolated rod. Data for (B) and (D) taken from
Baylor et al, 1986. (C) ∕⅛ current and opening probability Po with corresponding number of
open HCN channels for each stimulus as predicted by simulation. Simulation parameters
are given in Appendix A.3