NURS 5359 (Advanced Psychopharmacology) Exam 1
| Questions and Correct Answers plus Rationale | New
Update 2026-2027 | Graded A+
1. Which of the following best describes the primary therapeutic mechanism
of first-generation antipsychotics?
A) Blockade of dopamine D2 receptors in the mesolimbic pathway
B) Inhibition of serotonin reuptake in the prefrontal cortex
C) Enhancement of GABA activity in the basal ganglia
D) Stimulation of muscarinic receptors in the central nervous system
Correct Answer: Blockade of dopamine D2 receptors in the mesolimbic pathway
Rationale: First-generation antipsychotics primarily exert their therapeutic effect
by blocking dopamine D2 receptors in the mesolimbic pathway, which reduces
positive symptoms of schizophrenia such as hallucinations and delusions. This
mechanism is the foundation of the dopamine hypothesis of schizophrenia.
2. What is the primary function of the nigrostriatal dopamine pathway?
A) Regulation of prolactin secretion from the pituitary
B) Control of smooth motor movements and coordination
C) Mediation of reward, pleasure, and positive symptoms
D) Modulation of executive function in the prefrontal cortex
Correct Answer: Control of smooth motor movements and coordination
Rationale: The nigrostriatal pathway projects from the substantia nigra to the
striatum and is critical for smooth motor control. Blockade of D2 receptors in this
pathway by antipsychotics leads to extrapyramidal symptoms such as
parkinsonism, dystonia, and akathisia.
3. According to the dopamine hypothesis, overactivity in which pathway is
most associated with positive symptoms of schizophrenia?
,A) Mesocortical pathway
B) Nigrostriatal pathway
C) Tuberoinfundibular pathway
D) Mesolimbic pathway
Correct Answer: Mesolimbic pathway
Rationale: The mesolimbic pathway is part of the brain's reward system, and
overactivity of dopamine transmission here is linked to positive symptoms such as
hallucinations and delusions. Antipsychotic blockade of D2 receptors in this
pathway reduces these symptoms.
4. Which dopamine pathway is primarily implicated in the negative symptoms
of schizophrenia?
A) Mesolimbic pathway
B) Nigrostriatal pathway
C) Mesocortical pathway
D) Tuberoinfundibular pathway
Correct Answer: Mesocortical pathway
Rationale: Underactivity of dopamine in the mesocortical pathway, which projects
to the prefrontal cortex, is associated with negative symptoms such as apathy,
anhedonia, and social withdrawal. Blockade of this pathway by antipsychotics may
worsen these symptoms.
5. Hyperprolactinemia is most directly caused by antipsychotic blockade of
which dopamine pathway?
A) Mesolimbic pathway
B) Nigrostriatal pathway
C) Mesocortical pathway
D) Tuberoinfundibular pathway
Correct Answer: Tuberoinfundibular pathway
Rationale: The tuberoinfundibular pathway regulates prolactin secretion.
Dopamine normally inhibits prolactin release, so when antipsychotics block D2
,receptors here, prolactin levels rise, causing galactorrhea, amenorrhea,
gynecomastia, and sexual dysfunction.
6. Which extrapyramidal symptom is characterized by a subjective feeling of
restlessness and an urgent need to move?
A) Akathisia
B) Dystonia
C) Parkinsonism
D) Tardive dyskinesia
Correct Answer: Akathisia
Rationale: Akathisia is a common extrapyramidal side effect characterized by a
subjective feeling of restlessness and an urgent need to move. Clients may pace,
shift weight, or cross and uncross their legs. It is often mistaken for anxiety and
can be treated with beta-blockers or anticholinergics.
7. What is the primary mechanism of action of clozapine that distinguishes it
from first-generation antipsychotics?
A) Exclusive dopamine D2 antagonism
B) Combined serotonin 5-HT2A and dopamine D2 antagonism
C) Selective serotonin reuptake inhibition
D) Direct GABA receptor activation
Correct Answer: Combined serotonin 5-HT2A and dopamine D2 antagonism
Rationale: Clozapine is a second-generation antipsychotic that antagonizes both
serotonin 5-HT2A and dopamine D2 receptors. This dual mechanism is thought to
contribute to its efficacy in treatment-resistant schizophrenia and its lower risk of
extrapyramidal symptoms compared to first-generation agents.
8. A nurse is monitoring a client taking clozapine. Which finding requires
immediate intervention?
A) Fever and sore throat
B) Mild sedation
C) Increased appetite
D) Dry mouth
, Correct Answer: Fever and sore throat
Rationale: Fever and sore throat in a client taking clozapine may indicate severe
neutropenia or agranulocytosis, a life-threatening adverse effect. Immediate
evaluation with a complete blood count is required. Clozapine requires regular
blood-count monitoring.
9. Which laboratory value should be monitored closely in a client taking
lithium?
A) Serum sodium
B) Serum lithium level
C) Serum calcium
D) Serum chloride
Correct Answer: Serum lithium level
Rationale: Lithium has a narrow therapeutic index, with a therapeutic range of
0.6-1.2 mEq/L. Levels above 1.5 mEq/L can cause toxicity, including tremor,
confusion, ataxia, and seizures. Regular monitoring of serum lithium levels is
essential for safe administration.
10.Which finding indicates lithium toxicity?
A) Coarse hand tremor and confusion
B) Dry mouth and constipation
C) Increased appetite and weight gain
D) Improved mood and energy
Correct Answer: Coarse hand tremor and confusion
Rationale: Lithium toxicity is characterized by coarse hand tremor, confusion,
ataxia, vomiting, and seizures. It can occur with dehydration, NSAID use, or
excessive dosing. Serum lithium levels should be monitored, and immediate
medical attention is required for severe toxicity.
11.What is the primary purpose of administering lactulose in a client with
hepatic encephalopathy?
A) To increase protein synthesis in the liver
B) To reduce ammonia levels by promoting its excretion
| Questions and Correct Answers plus Rationale | New
Update 2026-2027 | Graded A+
1. Which of the following best describes the primary therapeutic mechanism
of first-generation antipsychotics?
A) Blockade of dopamine D2 receptors in the mesolimbic pathway
B) Inhibition of serotonin reuptake in the prefrontal cortex
C) Enhancement of GABA activity in the basal ganglia
D) Stimulation of muscarinic receptors in the central nervous system
Correct Answer: Blockade of dopamine D2 receptors in the mesolimbic pathway
Rationale: First-generation antipsychotics primarily exert their therapeutic effect
by blocking dopamine D2 receptors in the mesolimbic pathway, which reduces
positive symptoms of schizophrenia such as hallucinations and delusions. This
mechanism is the foundation of the dopamine hypothesis of schizophrenia.
2. What is the primary function of the nigrostriatal dopamine pathway?
A) Regulation of prolactin secretion from the pituitary
B) Control of smooth motor movements and coordination
C) Mediation of reward, pleasure, and positive symptoms
D) Modulation of executive function in the prefrontal cortex
Correct Answer: Control of smooth motor movements and coordination
Rationale: The nigrostriatal pathway projects from the substantia nigra to the
striatum and is critical for smooth motor control. Blockade of D2 receptors in this
pathway by antipsychotics leads to extrapyramidal symptoms such as
parkinsonism, dystonia, and akathisia.
3. According to the dopamine hypothesis, overactivity in which pathway is
most associated with positive symptoms of schizophrenia?
,A) Mesocortical pathway
B) Nigrostriatal pathway
C) Tuberoinfundibular pathway
D) Mesolimbic pathway
Correct Answer: Mesolimbic pathway
Rationale: The mesolimbic pathway is part of the brain's reward system, and
overactivity of dopamine transmission here is linked to positive symptoms such as
hallucinations and delusions. Antipsychotic blockade of D2 receptors in this
pathway reduces these symptoms.
4. Which dopamine pathway is primarily implicated in the negative symptoms
of schizophrenia?
A) Mesolimbic pathway
B) Nigrostriatal pathway
C) Mesocortical pathway
D) Tuberoinfundibular pathway
Correct Answer: Mesocortical pathway
Rationale: Underactivity of dopamine in the mesocortical pathway, which projects
to the prefrontal cortex, is associated with negative symptoms such as apathy,
anhedonia, and social withdrawal. Blockade of this pathway by antipsychotics may
worsen these symptoms.
5. Hyperprolactinemia is most directly caused by antipsychotic blockade of
which dopamine pathway?
A) Mesolimbic pathway
B) Nigrostriatal pathway
C) Mesocortical pathway
D) Tuberoinfundibular pathway
Correct Answer: Tuberoinfundibular pathway
Rationale: The tuberoinfundibular pathway regulates prolactin secretion.
Dopamine normally inhibits prolactin release, so when antipsychotics block D2
,receptors here, prolactin levels rise, causing galactorrhea, amenorrhea,
gynecomastia, and sexual dysfunction.
6. Which extrapyramidal symptom is characterized by a subjective feeling of
restlessness and an urgent need to move?
A) Akathisia
B) Dystonia
C) Parkinsonism
D) Tardive dyskinesia
Correct Answer: Akathisia
Rationale: Akathisia is a common extrapyramidal side effect characterized by a
subjective feeling of restlessness and an urgent need to move. Clients may pace,
shift weight, or cross and uncross their legs. It is often mistaken for anxiety and
can be treated with beta-blockers or anticholinergics.
7. What is the primary mechanism of action of clozapine that distinguishes it
from first-generation antipsychotics?
A) Exclusive dopamine D2 antagonism
B) Combined serotonin 5-HT2A and dopamine D2 antagonism
C) Selective serotonin reuptake inhibition
D) Direct GABA receptor activation
Correct Answer: Combined serotonin 5-HT2A and dopamine D2 antagonism
Rationale: Clozapine is a second-generation antipsychotic that antagonizes both
serotonin 5-HT2A and dopamine D2 receptors. This dual mechanism is thought to
contribute to its efficacy in treatment-resistant schizophrenia and its lower risk of
extrapyramidal symptoms compared to first-generation agents.
8. A nurse is monitoring a client taking clozapine. Which finding requires
immediate intervention?
A) Fever and sore throat
B) Mild sedation
C) Increased appetite
D) Dry mouth
, Correct Answer: Fever and sore throat
Rationale: Fever and sore throat in a client taking clozapine may indicate severe
neutropenia or agranulocytosis, a life-threatening adverse effect. Immediate
evaluation with a complete blood count is required. Clozapine requires regular
blood-count monitoring.
9. Which laboratory value should be monitored closely in a client taking
lithium?
A) Serum sodium
B) Serum lithium level
C) Serum calcium
D) Serum chloride
Correct Answer: Serum lithium level
Rationale: Lithium has a narrow therapeutic index, with a therapeutic range of
0.6-1.2 mEq/L. Levels above 1.5 mEq/L can cause toxicity, including tremor,
confusion, ataxia, and seizures. Regular monitoring of serum lithium levels is
essential for safe administration.
10.Which finding indicates lithium toxicity?
A) Coarse hand tremor and confusion
B) Dry mouth and constipation
C) Increased appetite and weight gain
D) Improved mood and energy
Correct Answer: Coarse hand tremor and confusion
Rationale: Lithium toxicity is characterized by coarse hand tremor, confusion,
ataxia, vomiting, and seizures. It can occur with dehydration, NSAID use, or
excessive dosing. Serum lithium levels should be monitored, and immediate
medical attention is required for severe toxicity.
11.What is the primary purpose of administering lactulose in a client with
hepatic encephalopathy?
A) To increase protein synthesis in the liver
B) To reduce ammonia levels by promoting its excretion
