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Nursing Pharmacology 6e Instructor Test Bank University of Houston Practical (OPTO 6253 )

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John Marsh
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Nursing Pharmacology 6e Instructor Test Bank University of Houston Practical (OPTO 6253 )

Chapter 33- Anticholinergic Agents
1.
A student asks the pharmacology instructor to explain the action of anticholinergic agents.
What would be the instructor’s best response?
A)
They block nicotinic receptors.
B)
They compete with serotonin for muscarinic acetylcholine receptor sites.
C)
They act to block the effects of the parasympathetic nervous system.
D)
They increase norepinephrine at the neuromuscular junction.
Ans: C
Feedback:
Drugs that are used to block the effects of acetylcholine are called anticholinergic drugs.
Because this action lyses, or blocks, the effects of the parasympathetic nervous system,
they are also called parasympatholytic agents. The drug works by blocking only the
muscarinic effectors in the parasympathetic nervous system. They compete with
acetylcholine for the muscarinic acetylcholine receptor sites. They do not block the
nicotinic receptors and have little or no effect at the neuromuscular junction.
2.
A patient calls the clinic and talks to the nurse. The patient tells the nurse he or she is
going on a cruise and is concerned about motion sickness. The patient says that a friend
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Nursing Pharmacology 6e Instructor Test Bank University of Houston Practical (OPTO 6253 )

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