Short answerEasy1 mark
5(i)
Name the nerve that transmits impulses to the brain from:
Eye
Topic: Optic nerve
Previous-year question practice database
Answer
Exam answer
The OPTIC NERVE.
Explanation
The optic nerve carries impulses from the RODS and CONES of the retina to the brain, where the image is interpreted.
THE POINT WORTH ADDING: the place where the optic nerve leaves the eyeball has NO rods or cones at all, so no image can be formed there. That is the BLIND SPOT — and it is the standard follow-up question to this one.
Both the optic and auditory nerves are SENSORY cranial nerves, among the 12 pairs arising from the brain.
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