A bit of dust blows into and touches the cornea of the eye. Which of the following is likely to happen?
A) Stimulation of the optic nerve (II) will cause tears to flow from the lacrimal gland.
B) Nothing, because there is no sensory information sent from the cornea.
C) Stimulation of the facial nerve (VII) will be perceived as pain.
D) Stimulation of the ophthalmic division of the trigeminal nerve (V) will cause blinking.

Question

Quizplus · Accepted Answer

Stimulation of the ophthalmic division of the trigeminal nerve (V) will cause blinking. The trigeminal nerve is responsible for innervating the cornea and the blinking reflex is a protective mechanism to prevent foreign objects from entering the eye.

A Bit of Dust Blows into and Touches the Cornea