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NURS 223 Adaptive Quiz:Lehne Chapters Exam #1 Drugs-questions and answers
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NURS 223 Adaptive Quiz:Lehne Chapters Exam #1 Drugs-questions and answers
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NURS 223 Adaptive Quiz:Lehne ChaptersExam #1 Drugs-questions and answers
The nurse is preparing to give a medication that stimulates the beta2 receptors. What
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response would the nurse expect from this drug?
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1
Hypoglycemia
2
Bronchodilation
3
Increased peristalsis
m
4
Constriction of the pupil - ANSWER: ➡ Bronchodilation
m m m m m mm m
Activation of beta2 receptors leads to bronchodilation; decreased uterine contractions;
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hyperglycemia; and vasodilation of the heart, lungs, and skeletal muscle. It does not produce
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hypoglycemia, increased peristalsis, or constriction of the pupil..
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The nurse is teaching a group of coworkers about drugs that affect the somatic motor system
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function. The nurse will teach that the site of action of this motor system is at what location?
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1
Preganglionic neurons m
2
Postganglionic neurons m
3
Neuromuscular junction m
4
Synapses of all neurons - ANSWER: ➡ Neuromuscular junction
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,Because this pathway contains only one neuron, peripherally acting drugs that affect somatic
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motor system function have only one site of action: the neuromuscular junction. This is
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unique to the somatic motor system. Other systems have numerous sites of action.
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Which neurotransmitter is most commonly found at the synapses of the peripheral nervous
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system?
m
1
Dopamine
2
Epinephrine
3
Acetylcholine
4
Norepinephrine - ANSWER: ➡ Acetylcholine m m mm m
Dopamine, epinephrine, acetylcholine, and norepinephrine are neurotransmitters for the
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peripheral nervous system, but acetylcholine is the most abundant. It is released by all
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preganglionic neurons in the sympathetic and parasympathetic systems. It also is released
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by all postganglionic neurons of the parasympathetic nervous system.
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A patient is experiencing symptoms of the fight-or-flight response. Which autonomic process
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stimulates this response?
m m m
1
Baroreceptor reflex m
2
Sympathetic system m
3
Parasympathetic system m
4
,Predominant tone of the organs - ANSWER: ➡ Sympathetic system
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Stimulation of the sympathetic nervous system produces the fight-or-flight response. The
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baroreceptor reflex regulates blood pressure.
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There are three main neurotransmitters used by the peripheral nervous system (PNS). What
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is the neurotransmitter employed at most junctions of the peripheral nervous system?
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1
Dopamine
2
Epinephrine
3
Acetylcholine
4
Norepinephrine - ANSWER: ➡ Acetylcholine m m mm m
Acetylcholine is the transmitter employed at most junctions of the PNS. Norepinephrine is
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released by the postganglionic neurons. Epinephrine is released by the adrenal medulla. The
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role of dopamine has not been demonstrated conclusively.
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The nurse is preparing to give a drug to stimulate activation of adrenergic receptors. Which
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effects indicate sympathetic stimulation?
m m m m
1
Sinus bradycardia
m
2
Atrioventricular block m
3
Increase in heart rate m m m
4
, Constriction of pupils - ANSWER: ➡ Increase in heart rate
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Activation of the adrenergic receptors stimulates the sympathetic nervous system and
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causes an increase in heart rate.
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What is the advantage of patients having multiple types of receptors to regulate bodily
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functions?
m
1
Lower therapeutic index
m m
2
Improved maximal efficacy m m
3
Higher degree of selectivity
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4
Reduction of side effects and toxicity - ANSWER: ➡ Higher degree of selectivity
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Selectivity is one of the most desirable qualities a drug can have. Many neuropharmacologic
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drugs are highly selective, because the nervous system works through multiple receptors to
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regulate processes under its control.
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What is a clinical indicator of parasympathetic nervous system stimulation?
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1
Retention of urine m m
2
Dilation of the pupils m m m
3
Dilation of the bronchi m m m
4
Slowing of the heart rate - ANSWER: ➡ Slowing of the heart rate
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