A quantitative comparison of the time-course of sensitivity changes produced by calcium injection and light adaptation in Limulus ventral photoreceptors.
The time-course of light and dark adaptation was quantitatively compared with the time-course of the onset of and recovery from desensitization produced by intracellular calcium injection in Limulus ventral photoreceptors. The onset of light adaptation tended to be faster (by 60-90 s) than the onset of desensitization produced by intracellular Ca++ injection. The initial portion of the time-course of dark adaptation was faster (about 10-20 s) than the time-course of recovery from desensitization  produced by  intracellular Ca++ injection. The final portion of recovery from Ca++ injection had the same time-course as a comparable dark adaptation.
D000818:Animals; D002118:Calcium / Q000494:pharmacology*; D003623:Dark Adaptation / Q000187:drug effects*; D006737:Horseshoe Crabs; D010786:Photoreceptor Cells / Q000187:drug effects*; D013997:Time Factors
D002118:Calcium