Figure 1. Summary of antagonists on intraretinal manganese uptake. Systemically administered antagonists were N-Methyl-D-aspartate (NMDA) receptor (MK-801 [MK]), 2-amino-3-(5-methyl-3-oxo-1,2- oxazol-4-yl)propanoic acid (AMPA) receptor (3-dihydroxy-6-nitro-7- sulfamoyl-benzo[f]quinoxaline-2,3-dione [NBQX; NB]), and L-type voltage-gated calcium channel (nifedipine (NIF)). Graphs depict A: Inner retina (IR) and B: Outer retina (OR) of dark adapted postnatal (P)50 Long Evans (LE) rats. The red line indicates a significant (p<0.05) difference from control values. Error bars represent standard error of the mean (SEM), and numbers above the bars represent the number of animals studied.