What structure is the arrow pointing to?
Incorrect. Ganglion cells (also called “retinal ganglion cells”) convey visual signals from the bipolar cells to the lateral geniculate bodies via the optic nerves. The indicated structure provides metabolic support to the rods and cones. What is this structure?
Incorrect. Rods are photoreceptors. The indicated structure provides metabolic support to the rods. Try again!
Correct. The retinal pigment epithelium (RPE) is a single layer of hexagonal cells that provides metabolic support to the rods and cones (photoreceptors). Tight junctions between retinal pigment epithelial cells form the outer blood-retinal barrier, which prevents macromolecules that escape from choroidal vessels from entering the retina. The RPE, rods, and cones are supplied by the choroidal arterioles.
Incorrect. Cones are photoreceptors. The indicated structure provides metabolic support to the cones. Try again!