these effects have been attributed to the action of da on horizontal cell membrane resistance , particularly at the gap junctions , and our present study on the carp retina agrees with this in showing that da also restricts intracellular lucifer yellow ( ly ) to single injected horizontal cells , an effect , like those of da on the s-potentials , which is antagonized by the dopamine blocker haloperidol .
C0206117
gap junctions
C0007634
cells