Which layer of the retina does Amacrine cells modify the synapse between ganglion cells and bipolar cells?

• A. Outer Nuclear Layer
• B. Inner Nuclear Layer
• C. Inner Plexiform Layer
• D. Outer Plexiform Layer

Answer: (C)

Amacrine cells influence the connection between bipolar cells and ganglion cells in the inner plexiform layer. Their cell bodies sit in the inner nuclear layer, and their processes extend into the inner plexiform layer to provide inhibitory modulation of the bipolar-to-ganglion synapse. This arrangement shapes how signals are transmitted from bipolar cells to ganglion cells, affecting timing, contrast, and motion processing. The outer plexiform layer is where photoreceptors connect to bipolar and horizontal cells, the inner nuclear layer contains the cell bodies of several retinal interneurons, and the actual synapses between bipolar and ganglion cells occur specifically in the inner plexiform layer.