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 facial nerve (VII)
C) the optic nerve (II)
D) the olfactory nerve (I)

Question

Quizplus · Accepted Answer

The facial nerve (VII) provides sensory innervation to the lacrimal gland, which produces tears in response to irritants such as chopping onions. The vagus nerve (X) is not involved in tear production, the optic nerve (II) is responsible for vision, and the olfactory nerve (I) is responsible for smell.

As a Cook Chops Red Onions He Begins to Tear