Fig. 7.

Effects of somatostatin on K⁺-induced Ca²⁺ accumulation in rods and cones. a, c, KCl (100 mm) was used to stimulate Ca²⁺ entry in the absence and the presence (hatchedhorizontalbar) of 0.5 μm somatostatin in rods (a) and cones (c). Somatostatin reduced Ca²⁺ accumulation in rods but increased it in cones. b, d, Histograms summarize the somatostatin-induced inhibition of Ca²⁺ accumulation in rods (b; n = 5) and its enhancement in cones (d; n = 5).Verticalbars show the mean values ± 1 SE.