The Circular Muscle of the Iris

Multiple Choice

The circular muscle of the iris

A) contracts in response to bright light to produce pupillary constriction
B) is innervated by the parasympathetic nervous system
C) contracts to slacken the suspensory ligaments and to increase the strength of the lens during accommodation
D) contracts in response to bright light to produce pupillary constriction and is innervated by the parasympathetic nervous system
E) all of these