Question
Write the difference between Rod cells and Cone cells.

Answer

Rod cellsCone cells
1. Rods are responsible for

vision in dim light.
1. The cones are

responsible for colour

vision and works best in

bright light.
2. The pigment present in

the rods is rhodopsin,

formed of a protein

scotopsin and retinal (an

aldehyde of vitamin A).
2. The pigment present in

the cones is photopsin,

formed of opsin protein

and retinal.
3. There are about 120

million rod cells.
3. There may be 6-7 million

cone cells.
4. Rods are predominant in

the extra fovea region.
4. Cones are concentrated

in the fovea region.

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