title: Visual transduction: chairman's introduction.
mesh_terms: D000818:Animals; D002118:Calcium / Q000502:physiology; D006152:Cyclic GMP / Q000502:physiology; D006801:Humans; D007473:Ion Channels / Q000502:physiology; D010786:Photoreceptor Cells / Q000502:physiology*; D012168:Retinal Pigments / Q000502:physiology*; D012243:Rhodopsin / Q000502:physiology*; D012964:Sodium / Q000502:physiology; D014785:Vision, Ocular
chemical_list: D007473:Ion Channels; D012168:Retinal Pigments; D012243:Rhodopsin; D012964:Sodium; D006152:Cyclic GMP; D002118:Calcium