Principles of Anatomy and Physiology 14e with Atlas of the Skeleton Set (14th Edition)

Published by Wiley
ISBN 10: 1-11877-456-6
ISBN 13: 978-1-11877-456-4

Chapter 17 - The Special Senses - Figure 17.8 - Page 583: 2

Answer

The sympathetic division of the ANS causes pupil dilation.

Work Step by Step

In dim light and distant vision, the radial muscles of the iris contract in response to sympathetic stimulation. This results in dilation of the pupil and more light entering the eye.
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