AIIMS 2006
- Exam
- AIIMS
- Year
- 2006
- Subject
- Zoology
- Chapter
- Neural Control and Coordination
AIIMS 2006 · Zoology · Neural Control and Coordination
Examine the diagram of the two cell types A and B given below and...
Examine the diagram of the two cell types and given below and select the correct option
Options
- ACell A is the rod cell found evenly all over retina
- BCell is the cone cell more concentrated in the fovea centralis
- CCell B is concerned with colour vision in bright light
- DCell A is sensitive to low light intensities
Correct answer
B. Cell is the cone cell more concentrated in the fovea centralis
Step-by-step solution
Cone cell is one of two types (other is rod) of light sensitive cells in the retina of the eye. The human retina contains 6-7 million cones which function best in bright light and are essential for active vision (receiving a sharp accurate image). The area of retina called the fovea contains the greatest concentration of cone. Cones can also distinguish colours. There are 3 types of cone, each sensitive to the wavelength of a different primary colour - red, green or blue.