Question

multiple choice question
the pupillary dilator is innervated by the ______ nervous system.
o parasympathetic
o sympathetic

Explanation:

The sympathetic nervous system is responsible for the "fight - or - flight" response. One of its functions is to dilate the pupils (through innervation of the pupillary dilator muscle) to allow more light in, which can be useful in situations where heightened awareness is needed. The parasympathetic nervous system, on the other hand, is associated with the "rest - and - digest" response and causes pupil constriction.

Answer:

sympathetic