An Anticholinergic Drug Such as Atropine

Question

An anticholinergic drug such as atropine
A) causes miosis.
B) causes the circular muscles to contract.
C) causes ptosis of the eyelid.
D) dilates the pupil.

Accepted Answer

Anticholinergic drugs inhibit the action of the neurotransmitter acetylcholine, which normally causes constriction of the pupil. As a result, anticholinergic drugs such as atropine will dilate the pupil.