As a cook chops red onions he begins to tear up due to activation of the lacrimal gland.Which of the following nerves provided the stimulus?
A) the vagus nerve (X)
B) the optic nerve (II)
C) the facial nerve (VII)
D) the olfactory nerve (I)

Question

Quizplus · Accepted Answer

The lacrimal gland is innervated by the facial nerve (VII). When the cook is chopping the red onions, the vapors irritate the eyes and activate the facial nerve, leading to tear production from the lacrimal gland. The vagus nerve has no direct involvement in tear production, the optic nerve is responsible for vision, and the olfactory nerve is responsible for sense of smell.

As a Cook Chops Red Onions He Begins to Tear