Question

The second cranial nerve of frog is distributed in

• A. Retina alone
• B. Lens and retina
• C. Iris and eye muscles
• D. Eye muscles and retina

Answer 1

Answer: (A)

Retina alone

There are 10 pairs of cranial nerves in a frog. They extend from lateral surfaces of the brain to the parts of the body. The second cranial nerve is an optic nerve. It originates from optic thalami and is somatic sensory in nature. It receives impulses from the retina of the eye. So, the correct answer is option A.