Final answer:
Magnocellular-Y OFF cells are a type of retinal ganglion cell that increase their firing rate when exposed to light and decrease their firing rate when the light is turned off.
Step-by-step explanation:
Magnocellular-Y OFF cells are a type of retinal ganglion cell found in the retina. These cells are responsible for transmitting visual information from the retina to the brain. When a light is turned on, there is an increase in firing rate of Magnocellular-Y OFF cells. This increased firing rate signifies the presence of light and is an important part of the visual signaling process. Conversely, when the light is turned off, there is a decrease in firing rate of these cells.