A sudden flash of bright light would cause
A) parasympathetic activation to contract the pupillary constrictor muscles.
B) sympathetic activation to contract the pupillary constrictor muscles.
C) parasympathetic activation to contract the pupillary dilator muscles.
D) sympathetic activation to contract the pupillary dilator muscles.
E) contraction of the ciliary muscle.

Question

Quizplus · Accepted Answer

A sudden flash of bright light causes the pupils to constrict to limit the amount of light entering the eye. This response is mediated by the parasympathetic nervous system, which activates the pupillary constrictor muscles.

A Sudden Flash of Bright Light Would Cause