21. Rod cells are the ones responsible for night vision, and cone cells are responsible for color vision.22. At lower light levels, where only the rod cells function, the sensitivity is greatest at a blueish-green wavelength. 23. When these channels close, the rod cell produces less neurotransmitter, which is perceived by the brain as light. 24. Rod cells , which are concentrated further away from the fovea, operate better than cone cells in low light.25. In very low light levels, vision is scotopic : light is detected by rod cells of the retina. 26. Rod cells in the depolarized state constantly release neurotransmitters which in turn stimulate the nerves associated with rod cells.27. The large number of rod cells in the retina facilitate night vision, and there is an efficient olfactory system. 28. This is known as the Mizuo-Nakamura phenomena and is thought to be caused by the overstimulation of rod cells . 29. Some of the deeper water fish have tubular eyes with big lenses and only rod cells that look upwards. 30. Rod cells in the depolarized state constantly release neurotransmitters which in turn stimulate the nerves associated with rod cells .
