Acetylcholine will cause the pupil of the eye to constrict. A drug acts on receptors for acetylcholine to cause the pupils of the eye to dilate. Nicotine does not bind to receptors in smooth muscle cells of the iris
Therefore, the drug which causes the pupils to dilate is a
A. nicotinic blocking agent.
B. muscarinic blocking agent.
C. a nicotinic agent.
D. a muscarinic agent.
E. an adrenergic agent.
B
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