Which type of drug would be useful in dilating the pupils for an examination of the retina?
A) beta-1 receptor mimic
B) muscarinic receptor inhibitor
C) alpha-1 receptor inhibitor
D) beta-3 receptor mimic

Question

Quizplus · Accepted Answer

Muscarinic receptor inhibitors such as atropine are used to dilate the pupils for an examination of the retina. These drugs block the action of acetylcholine on the circular muscles of the iris, causing the radial muscles to contract and the pupil to dilate.

Which Type of Drug Would Be Useful in Dilating the Pupils