title: Ionic mechanisms in excitation of photoreceptors.
abstract: Both measurements and rough theoretical calculations suggest that both sites in the plasma membrane where the dark current enters and the mechanism that produces the intracellular excitatory transmitter of rod vision operate via ionophoric mechanisms with very low specific conductivities and high ionic specificities properties similar to those of carriers in artificial and natural membranes.
mesh_terms: D000818:Animals; D001692:Biological Transport; D002118:Calcium / Q000378:metabolism; D002462:Cell Membrane / Q000378:metabolism; D007477:Ions; D008564:Membrane Potentials; D010786:Photoreceptor Cells / Q000378:metabolism / Q000502:physiology*; D013329:Structure-Activity Relationship
chemical_list: D007477:Ions; D002118:Calcium