Pupil dilation occurs when a person steps from a light room into a dark one. What reflex causes such a reaction?

Answer options

1. Parasympathetic conditioned reflex
2. Sympathetic unconditioned reflex
3. Metasympathetic reflex
4. Parasympathetic unconditioned reflex
5. Sympathetic conditioned reflex

Explanation

The pupillary response is a physiological response that varies the size of the pupil, via the optic and oculomotor cranial nerve. ... Dilation of the pupil occurs when the smooth cells of the radial muscle, controlled by the