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NR-546 ADVANCED PHARMACOLOGY – PSYCHOPHARMACOLOGY FOR
THE PMHNP QUESTIONS EXAM LATEST VERSION 2026 - 2027
NR-546: ADVANCED PHARMACOLOGY – PSYCHOPHARMACOLOGY FOR THE
PMHNP
Questions with Answers & Detailed Rationales
Course: NR-546 Advanced Pharmacology: Psychopharmacology for the Psychiatric-
Mental Health Nurse Practitioner (PMHNP)
Institution: Chamberlain University
Format: Multiple-Choice with Detailed Rationales | Updated: 2025/2026
1. Which brain region is primarily responsible for executive function, decision-making,
and is implicated in the negative symptoms of schizophrenia?
A) Amygdala
B) Hippocampus
C) Prefrontal cortex
D) Nucleus accumbens
Correct Answer: C
Rationale: The prefrontal cortex (PFC) governs executive function, working memory,
impulse control, and emotional regulation. Hypofunction of the mesocortical dopamine
pathway (VTA → PFC) is linked to negative symptoms of schizophrenia (avolition, alogia,
flat affect). The amygdala processes fear and anxiety; the hippocampus is critical for
memory formation; the nucleus accumbens is the core reward center .
2. The myelin sheath surrounding axons is produced by which cell type in the central
nervous system?
A) Schwann cells
, Page 2 of 100
B) Oligodendrocytes
C) Astrocytes
D) Microglia
Correct Answer: B
Rationale: Oligodendrocytes myelinate CNS axons; Schwann cells myelinate PNS
axons. Astrocytes provide metabolic support and form the blood-brain barrier; microglia
are CNS immune cells. This distinction is clinically relevant because demyelinating
diseases like multiple sclerosis affect oligodendrocytes .
3. Which event directly triggers synaptic vesicle fusion and neurotransmitter release at
the axon terminal?
A) Sodium influx during depolarization
B) Potassium efflux during repolarization
C) Calcium influx through voltage-gated channels
D) Chloride influx through ligand-gated channels
Correct Answer: C
Rationale: When an action potential reaches the axon terminal, voltage-gated Ca²⁺
channels open, Ca²⁺ rushes in, and this calcium influx triggers SNARE-mediated vesicle
fusion and exocytosis of neurotransmitters into the synaptic cleft .
4. Autoreceptors on the presynaptic neuron typically function to:
A) Increase neurotransmitter release when activated
B) Provide negative feedback to inhibit further neurotransmitter release
C) Activate postsynaptic neurons directly
D) Block reuptake transporters
Correct Answer: B
Rationale: Autoreceptors (e.g., 5-HT1A, D2 presynaptic) detect neurotransmitter in the
synaptic cleft and provide negative feedback, reducing further synthesis and release.
This is a homeostatic mechanism .
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5. The neurotrophic hypothesis of depression proposes that:
A) Depression is caused by excess norepinephrine
B) Chronic stress reduces BDNF expression, leading to hippocampal atrophy and mood
dysregulation
C) Depression results from GABA receptor upregulation
D) Antidepressants work primarily by blocking sodium channels
Correct Answer: B
Rationale: The neurotrophic hypothesis posits that chronic stress reduces brain-
derived neurotrophic factor (BDNF), leading to neuronal atrophy in the hippocampus
and prefrontal cortex. Antidepressants work in part by restoring BDNF levels and
promoting neuroplasticity .
6. Which neurotransmitter is primarily involved in the "reward circuit" and is central to
the development of substance use disorders?
A) Serotonin
B) Norepinephrine
C) Dopamine
D) GABA
Correct Answer: C
Rationale: Dopamine is the primary neurotransmitter associated with the reward
system, particularly in the nucleus accumbens. Substances cause a surge in dopamine
levels, reinforcing the behavior .
7. Which dopamine pathway is associated with the positive symptoms of
schizophrenia?
A) Mesocortical pathway
B) Mesolimbic pathway
C) Nigrostriatal pathway
D) Tuberoinfundibular pathway
Correct Answer: B
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Rationale: Hyperactivity of the mesolimbic dopamine pathway (VTA → nucleus
accumbens) is associated with positive symptoms of schizophrenia (hallucinations,
delusions). Hypoactivity of the mesocortical pathway is associated with negative
symptoms .
8. The nigrostriatal dopamine pathway is primarily involved in:
A) Reward and reinforcement
B) Executive function
C) Motor control
D) Prolactin regulation
Correct Answer: C
Rationale: The nigrostriatal pathway (substantia nigra → striatum) is involved in motor
control. Blockade of D2 receptors in this pathway by antipsychotics leads to
extrapyramidal symptoms (EPS) .
9. Blockade of dopamine in the tuberoinfundibular pathway would most likely result in:
A) Extrapyramidal symptoms
B) Hyperprolactinemia
C) Negative symptoms
D) Positive symptoms
Correct Answer: B
Rationale: The tuberoinfundibular pathway regulates prolactin secretion. Dopamine
inhibits prolactin release; blockade of D2 receptors in this pathway leads to
hyperprolactinemia, causing galactorrhea, amenorrhea, and sexual dysfunction.
10. Which serotonin receptor subtype is most associated with the therapeutic effects of
SSRIs in depression?
A) 5-HT1A
B) 5-HT2A
C) 5-HT3
NR-546 ADVANCED PHARMACOLOGY – PSYCHOPHARMACOLOGY FOR
THE PMHNP QUESTIONS EXAM LATEST VERSION 2026 - 2027
NR-546: ADVANCED PHARMACOLOGY – PSYCHOPHARMACOLOGY FOR THE
PMHNP
Questions with Answers & Detailed Rationales
Course: NR-546 Advanced Pharmacology: Psychopharmacology for the Psychiatric-
Mental Health Nurse Practitioner (PMHNP)
Institution: Chamberlain University
Format: Multiple-Choice with Detailed Rationales | Updated: 2025/2026
1. Which brain region is primarily responsible for executive function, decision-making,
and is implicated in the negative symptoms of schizophrenia?
A) Amygdala
B) Hippocampus
C) Prefrontal cortex
D) Nucleus accumbens
Correct Answer: C
Rationale: The prefrontal cortex (PFC) governs executive function, working memory,
impulse control, and emotional regulation. Hypofunction of the mesocortical dopamine
pathway (VTA → PFC) is linked to negative symptoms of schizophrenia (avolition, alogia,
flat affect). The amygdala processes fear and anxiety; the hippocampus is critical for
memory formation; the nucleus accumbens is the core reward center .
2. The myelin sheath surrounding axons is produced by which cell type in the central
nervous system?
A) Schwann cells
, Page 2 of 100
B) Oligodendrocytes
C) Astrocytes
D) Microglia
Correct Answer: B
Rationale: Oligodendrocytes myelinate CNS axons; Schwann cells myelinate PNS
axons. Astrocytes provide metabolic support and form the blood-brain barrier; microglia
are CNS immune cells. This distinction is clinically relevant because demyelinating
diseases like multiple sclerosis affect oligodendrocytes .
3. Which event directly triggers synaptic vesicle fusion and neurotransmitter release at
the axon terminal?
A) Sodium influx during depolarization
B) Potassium efflux during repolarization
C) Calcium influx through voltage-gated channels
D) Chloride influx through ligand-gated channels
Correct Answer: C
Rationale: When an action potential reaches the axon terminal, voltage-gated Ca²⁺
channels open, Ca²⁺ rushes in, and this calcium influx triggers SNARE-mediated vesicle
fusion and exocytosis of neurotransmitters into the synaptic cleft .
4. Autoreceptors on the presynaptic neuron typically function to:
A) Increase neurotransmitter release when activated
B) Provide negative feedback to inhibit further neurotransmitter release
C) Activate postsynaptic neurons directly
D) Block reuptake transporters
Correct Answer: B
Rationale: Autoreceptors (e.g., 5-HT1A, D2 presynaptic) detect neurotransmitter in the
synaptic cleft and provide negative feedback, reducing further synthesis and release.
This is a homeostatic mechanism .
, Page 3 of 100
5. The neurotrophic hypothesis of depression proposes that:
A) Depression is caused by excess norepinephrine
B) Chronic stress reduces BDNF expression, leading to hippocampal atrophy and mood
dysregulation
C) Depression results from GABA receptor upregulation
D) Antidepressants work primarily by blocking sodium channels
Correct Answer: B
Rationale: The neurotrophic hypothesis posits that chronic stress reduces brain-
derived neurotrophic factor (BDNF), leading to neuronal atrophy in the hippocampus
and prefrontal cortex. Antidepressants work in part by restoring BDNF levels and
promoting neuroplasticity .
6. Which neurotransmitter is primarily involved in the "reward circuit" and is central to
the development of substance use disorders?
A) Serotonin
B) Norepinephrine
C) Dopamine
D) GABA
Correct Answer: C
Rationale: Dopamine is the primary neurotransmitter associated with the reward
system, particularly in the nucleus accumbens. Substances cause a surge in dopamine
levels, reinforcing the behavior .
7. Which dopamine pathway is associated with the positive symptoms of
schizophrenia?
A) Mesocortical pathway
B) Mesolimbic pathway
C) Nigrostriatal pathway
D) Tuberoinfundibular pathway
Correct Answer: B
, Page 4 of 100
Rationale: Hyperactivity of the mesolimbic dopamine pathway (VTA → nucleus
accumbens) is associated with positive symptoms of schizophrenia (hallucinations,
delusions). Hypoactivity of the mesocortical pathway is associated with negative
symptoms .
8. The nigrostriatal dopamine pathway is primarily involved in:
A) Reward and reinforcement
B) Executive function
C) Motor control
D) Prolactin regulation
Correct Answer: C
Rationale: The nigrostriatal pathway (substantia nigra → striatum) is involved in motor
control. Blockade of D2 receptors in this pathway by antipsychotics leads to
extrapyramidal symptoms (EPS) .
9. Blockade of dopamine in the tuberoinfundibular pathway would most likely result in:
A) Extrapyramidal symptoms
B) Hyperprolactinemia
C) Negative symptoms
D) Positive symptoms
Correct Answer: B
Rationale: The tuberoinfundibular pathway regulates prolactin secretion. Dopamine
inhibits prolactin release; blockade of D2 receptors in this pathway leads to
hyperprolactinemia, causing galactorrhea, amenorrhea, and sexual dysfunction.
10. Which serotonin receptor subtype is most associated with the therapeutic effects of
SSRIs in depression?
A) 5-HT1A
B) 5-HT2A
C) 5-HT3
