Effects of barium on separately recorded fast and slow PIII responses in bullfrog retina.
Investigation of Ba2+ effects on fast and slow PIII responses in isolated bullfrog retina revealed that Ba2+ suppressed slow PIII completely with little effect on fast PIII. A light-induced [K+]0 decrease in the photoreceptor layer was observed in spite of Ba2+ perfusion, indicating the suppressive action of Ba2+ on the K+ conductance of the Müller cell membrane.
D000818:Animals; D001464:Barium / Q000494:pharmacology*; D005071:Evoked Potentials / Q000187:drug effects / Q000528:radiation effects; D008027:Light; D010786:Photoreceptor Cells / Q000187:drug effects / Q000502:physiology*; D011188:Potassium / Q000378:metabolism; D011892:Rana catesbeiana; D012160:Retina / Q000502:physiology*
D001464:Barium; D011188:Potassium