The excitation of photoreceptors.
D000818:Animals; D002462:Cell Membrane; D003080:Cold Temperature; D003623:Dark Adaptation; D006863:Hydrogen-Ion Concentration; D008027:Light; D008564:Membrane Potentials; D008854:Microscopy, Electron; D008954:Models, Biological; D010786:Photoreceptor Cells / Q000032:analysis; D051381:Rats; D012168:Retinal Pigments; D013997:Time Factors; D014316:Tritium; D014801:Vitamin A / Q000378:metabolism
D012168:Retinal Pigments; D014316:Tritium; D014801:Vitamin A