Barkley PMHNP CHaPter Quiz 12
SCHizoPHreNia SPeCtruM aNd
otHer PSyCHotiC diSorderS —
VerSioN 2.0 CoMPreHeNSiVe 150-
QueStioN MultiPle-CHoiCe
exaMiNatioN a well detailed oNe
writteN aNd graded
a+ uPgraded
Section 1: Neurobiology and Pathophysiology (Questions 1–20)
1. A PMHNP is explaining the dopamine hypothesis to a patient's family. Which statement
best describes the role of dopamine dysregulation in schizophrenia?
• A) Dopamine is decreased in all brain regions, leading to both positive and negative
symptoms
• B) Hyperdopaminergia in the mesolimbic pathway contributes to positive symptoms,
while hypodopaminergia in the mesocortical pathway contributes to negative symptoms
• C) Dopamine is only involved in the development of negative symptoms
• D) Dopamine dysregulation is not a significant factor in schizophrenia
,Correct Answer: B — The dopamine hypothesis distinguishes between mesolimbic
hyperdopaminergia (positive symptoms like hallucinations and delusions) and mesocortical
hypodopaminergia (negative symptoms like avolition and affective blunting).
2. A 24-year-old patient with schizophrenia is being evaluated for potential genetic
contributions to the illness. Which of the following statements about the genetics of
schizophrenia is most accurate?
• A) Schizophrenia follows a simple Mendelian inheritance pattern
• B) The concordance rate for monozygotic twins is approximately 50%, indicating
significant heritability
• C) First-degree relatives have a 25% lifetime risk of developing schizophrenia
• D) Genetic factors play no role in the development of schizophrenia
Correct Answer: B — The concordance rate for monozygotic twins is approximately 50%,
indicating strong genetic heritability. Schizophrenia is polygenic and does not follow Mendelian
inheritance. First-degree relatives have approximately a 10% lifetime risk.
3. A 32-year-old patient with schizophrenia is found to have enlarged lateral ventricles on
neuroimaging. This finding is most consistent with which of the following?
• A) A neurodegenerative process
• B) A neurodevelopmental abnormality
• C) Medication-induced changes
• D) A normal variant
Correct Answer: B — Enlarged lateral ventricles and reduced cortical gray matter are among the
most consistently reported structural abnormalities in schizophrenia, supporting the
neurodevelopmental model. These changes are present early in the illness and are not primarily
due to neurodegeneration.
4. A PMHNP is reviewing the role of glutamate in schizophrenia. Which of the following best
describes the glutamate hypothesis?
• A) Glutamate is increased in all brain regions, leading to excitotoxicity
, • B) NMDA receptor hypofunction may contribute to the pathophysiology of schizophrenia
• C) Glutamate is only involved in the development of cognitive symptoms
• D) Glutamate dysregulation is not a significant factor in schizophrenia
Correct Answer: B — The glutamate hypothesis proposes that NMDA receptor hypofunction
contributes to the pathophysiology of schizophrenia. This is supported by the observation that
NMDA receptor antagonists (e.g., phencyclidine, ketamine) can produce psychotic symptoms.
5. A 28-year-old patient with schizophrenia is noted to have a decreased volume of the
hippocampus. Which of the following is the most likely explanation for this finding?
• A) Neurodegeneration due to antipsychotic medications
• B) A neurodevelopmental abnormality
• C) A consequence of substance use
• D) A normal age-related change
Correct Answer: B — Hippocampal volume reduction is a well-documented finding in
schizophrenia and is thought to reflect neurodevelopmental abnormalities. It is not primarily
caused by medications or substance use.
6. A PMHNP is discussing the role of prenatal factors in the development of schizophrenia.
Which of the following prenatal factors is most strongly associated with an increased risk of
schizophrenia?
• A) Maternal diabetes
• B) Maternal influenza during the second trimester
• C) Maternal hypertension
• D) Maternal obesity
Correct Answer: B — Maternal influenza during the second trimester has been associated with
an increased risk of schizophrenia in offspring. Other prenatal factors include maternal
malnutrition and obstetric complications.
, 7. A 30-year-old patient with schizophrenia is being evaluated for cognitive symptoms. Which
of the following cognitive domains is most commonly impaired in schizophrenia?
• A) Visuospatial skills
• B) Executive function, attention, and working memory
• C) Language comprehension
• D) Procedural memory
Correct Answer: B — Executive function, attention, and working memory are among the most
commonly impaired cognitive domains in schizophrenia. These deficits are often present before
the onset of psychosis and persist throughout the illness.
8. A PMHNP is reviewing the neurochemical basis of antipsychotic medications. Which of the
following best describes the mechanism of action of second-generation antipsychotics?
• A) Selective D2 receptor antagonism
• B) D2 and 5-HT2A receptor antagonism
• C) Selective 5-HT2A receptor antagonism
• D) Dopamine reuptake inhibition
Correct Answer: B — Second-generation antipsychotics (atypicals) are characterized by D2 and
5-HT2A receptor antagonism. First-generation antipsychotics primarily act as D2 receptor
antagonists.
9. A 35-year-old patient with schizophrenia is found to have decreased prefrontal cortex
activity on functional imaging. This finding is most closely associated with which of the
following?
• A) Positive symptoms
• B) Negative symptoms
• C) Cognitive symptoms
• D) Mood symptoms
SCHizoPHreNia SPeCtruM aNd
otHer PSyCHotiC diSorderS —
VerSioN 2.0 CoMPreHeNSiVe 150-
QueStioN MultiPle-CHoiCe
exaMiNatioN a well detailed oNe
writteN aNd graded
a+ uPgraded
Section 1: Neurobiology and Pathophysiology (Questions 1–20)
1. A PMHNP is explaining the dopamine hypothesis to a patient's family. Which statement
best describes the role of dopamine dysregulation in schizophrenia?
• A) Dopamine is decreased in all brain regions, leading to both positive and negative
symptoms
• B) Hyperdopaminergia in the mesolimbic pathway contributes to positive symptoms,
while hypodopaminergia in the mesocortical pathway contributes to negative symptoms
• C) Dopamine is only involved in the development of negative symptoms
• D) Dopamine dysregulation is not a significant factor in schizophrenia
,Correct Answer: B — The dopamine hypothesis distinguishes between mesolimbic
hyperdopaminergia (positive symptoms like hallucinations and delusions) and mesocortical
hypodopaminergia (negative symptoms like avolition and affective blunting).
2. A 24-year-old patient with schizophrenia is being evaluated for potential genetic
contributions to the illness. Which of the following statements about the genetics of
schizophrenia is most accurate?
• A) Schizophrenia follows a simple Mendelian inheritance pattern
• B) The concordance rate for monozygotic twins is approximately 50%, indicating
significant heritability
• C) First-degree relatives have a 25% lifetime risk of developing schizophrenia
• D) Genetic factors play no role in the development of schizophrenia
Correct Answer: B — The concordance rate for monozygotic twins is approximately 50%,
indicating strong genetic heritability. Schizophrenia is polygenic and does not follow Mendelian
inheritance. First-degree relatives have approximately a 10% lifetime risk.
3. A 32-year-old patient with schizophrenia is found to have enlarged lateral ventricles on
neuroimaging. This finding is most consistent with which of the following?
• A) A neurodegenerative process
• B) A neurodevelopmental abnormality
• C) Medication-induced changes
• D) A normal variant
Correct Answer: B — Enlarged lateral ventricles and reduced cortical gray matter are among the
most consistently reported structural abnormalities in schizophrenia, supporting the
neurodevelopmental model. These changes are present early in the illness and are not primarily
due to neurodegeneration.
4. A PMHNP is reviewing the role of glutamate in schizophrenia. Which of the following best
describes the glutamate hypothesis?
• A) Glutamate is increased in all brain regions, leading to excitotoxicity
, • B) NMDA receptor hypofunction may contribute to the pathophysiology of schizophrenia
• C) Glutamate is only involved in the development of cognitive symptoms
• D) Glutamate dysregulation is not a significant factor in schizophrenia
Correct Answer: B — The glutamate hypothesis proposes that NMDA receptor hypofunction
contributes to the pathophysiology of schizophrenia. This is supported by the observation that
NMDA receptor antagonists (e.g., phencyclidine, ketamine) can produce psychotic symptoms.
5. A 28-year-old patient with schizophrenia is noted to have a decreased volume of the
hippocampus. Which of the following is the most likely explanation for this finding?
• A) Neurodegeneration due to antipsychotic medications
• B) A neurodevelopmental abnormality
• C) A consequence of substance use
• D) A normal age-related change
Correct Answer: B — Hippocampal volume reduction is a well-documented finding in
schizophrenia and is thought to reflect neurodevelopmental abnormalities. It is not primarily
caused by medications or substance use.
6. A PMHNP is discussing the role of prenatal factors in the development of schizophrenia.
Which of the following prenatal factors is most strongly associated with an increased risk of
schizophrenia?
• A) Maternal diabetes
• B) Maternal influenza during the second trimester
• C) Maternal hypertension
• D) Maternal obesity
Correct Answer: B — Maternal influenza during the second trimester has been associated with
an increased risk of schizophrenia in offspring. Other prenatal factors include maternal
malnutrition and obstetric complications.
, 7. A 30-year-old patient with schizophrenia is being evaluated for cognitive symptoms. Which
of the following cognitive domains is most commonly impaired in schizophrenia?
• A) Visuospatial skills
• B) Executive function, attention, and working memory
• C) Language comprehension
• D) Procedural memory
Correct Answer: B — Executive function, attention, and working memory are among the most
commonly impaired cognitive domains in schizophrenia. These deficits are often present before
the onset of psychosis and persist throughout the illness.
8. A PMHNP is reviewing the neurochemical basis of antipsychotic medications. Which of the
following best describes the mechanism of action of second-generation antipsychotics?
• A) Selective D2 receptor antagonism
• B) D2 and 5-HT2A receptor antagonism
• C) Selective 5-HT2A receptor antagonism
• D) Dopamine reuptake inhibition
Correct Answer: B — Second-generation antipsychotics (atypicals) are characterized by D2 and
5-HT2A receptor antagonism. First-generation antipsychotics primarily act as D2 receptor
antagonists.
9. A 35-year-old patient with schizophrenia is found to have decreased prefrontal cortex
activity on functional imaging. This finding is most closely associated with which of the
following?
• A) Positive symptoms
• B) Negative symptoms
• C) Cognitive symptoms
• D) Mood symptoms
