Present status of the three hypotheses proposed for the visual excitation process.
D000200:Action Potentials; D000818:Animals; D001001:Anura; D002417:Cattle; D002463:Cell Membrane Permeability; D004140:Dinitrophenols / Q000494:pharmacology; D006651:Histocytochemistry; D008027:Light; D010786:Photoreceptor Cells / Q000502:physiology*; D011188:Potassium / Q000378:metabolism; D011817:Rabbits; D012160:Retina / Q000032:analysis / Q000378:metabolism; D012168:Retinal Pigments / Q000032:analysis / Q000502:physiology; D012964:Sodium / Q000378:metabolism
D004140:Dinitrophenols; D012168:Retinal Pigments; D012964:Sodium; D011188:Potassium