Given below are groups of terms. In each group the first pair indicates the relationship between the two terms. Rewrite and complete the second pair on a similar basis. Example: Oxygen : Inspiration :: Carbon dioxide : Expiration
Eye : Optic nerve :: Ear : __________
Topic: Auditory nerve
Answer
AUDITORY NERVE (vestibulocochlear nerve).
The relationship is SENSE ORGAN : THE NERVE CARRYING ITS IMPULSES TO THE BRAIN. The optic nerve serves the eye, so the auditory nerve serves the ear.
Both are SENSORY cranial nerves, among the 12 pairs arising from the brain.
THE FULLER NAME, VESTIBULOCOCHLEAR, records that it serves BOTH jobs of the inner ear — the COCHLEAR branch for hearing and the VESTIBULAR branch for balance.
THE METHOD for every analogy: state the relationship of the first pair IN WORDS before attempting the second. Here it is "organ : its sensory nerve", and the answer follows at once.