NR 546 MIDTERM EXAM NEW 2026/2027 UPDATE |
Psychopharmacology for Psychiatric-Mental Health NP |
Questions & Verified Answers | Chamberlain | Pass
Guaranteed - A+ Graded
Aligned with 2026/2027 Chamberlain University NR546 Curriculum, ANCC PMHNP-BC
Competencies, & Evidence-Based Psychopharmacology Guidelines
Section 1: Neurobiology & Neurotransmitter Systems (Questions 1-12)
Question 1
A PMHNP is reviewing the neurobiology of schizophrenia. Positive symptoms
(hallucinations, delusions) are MOST associated with hyperactivity of which dopamine
pathway?
A. Mesocortical pathway
B. Mesolimbic pathway
C. Nigrostriatal pathway
D. Tuberoinfundibular pathway
Correct Answer: B
Rationale: The mesolimbic pathway (VTA to nucleus accumbens) is hyperactive in
positive symptoms of schizophrenia. Option A (mesocortical) is hypoactive in
negative/cognitive symptoms. Option C (nigrostriatal) is associated with EPS when D2
,is blocked. Option D (tuberoinfundibular) regulates prolactin; D2 blockade causes
hyperprolactinemia. NR546 emphasizes pathway-specific dopamine dysfunction as
foundational to psychopharmacology.
Question 2
Which receptor subtype is PRIMARILY responsible for antipsychotic efficacy, and its
blockade is also responsible for acute extrapyramidal symptoms (EPS)?
A. D1 receptor
B. D2 receptor
C. D3 receptor
D. D4 receptor
Correct Answer: B
Rationale: D2 receptor blockade is the primary mechanism for antipsychotic efficacy
and is responsible for acute EPS (dystonia, parkinsonism, akathisia). Option A (D1) is
not the primary antipsychotic target. Option C (D3) has affinity but is not the primary
efficacy receptor. Option D (D4) has minimal clinical relevance. NR546 teaches that D2
occupancy >65% correlates with efficacy, while >78% correlates with EPS.
Question 3
A patient presents with depression, anxiety, and insomnia. The PMHNP considers a
medication that acts on the 5-HT1A receptor. Activation of 5-HT1A autoreceptors in the
raphe nuclei results in:
A. Increased serotonin release
B. Decreased serotonin release (negative feedback)
,C. No change in serotonin release
D. Blockade of serotonin reuptake
Correct Answer: B
Rationale: 5-HT1A autoreceptors in the raphe nuclei mediate negative feedback;
activation decreases serotonin release. This explains the delayed onset of SSRIs (initial
5-HT increase → autoreceptor activation → decreased release → desensitization over
4-6 weeks → sustained increase). Option A is incorrect for autoreceptors. Option C is
false. Option D describes SERT inhibition, not 5-HT1A. NR546 emphasizes autoreceptor
desensitization as the mechanism for delayed antidepressant onset.
Question 4
Which second messenger system is activated when a G-protein coupled receptor
(GPCR) like the 5-HT2A receptor is stimulated?
A. Direct ligand-gated ion channel opening
B. Phospholipase C activation → IP3/DAG → calcium release and protein kinase C
activation
C. cGMP synthesis
D. Direct tyrosine kinase activation
Correct Answer: B
Rationale: 5-HT2A is a Gq-coupled receptor activating phospholipase C → IP3 (releases
intracellular calcium) and DAG (activates protein kinase C). Option A describes
ionotropic receptors (NMDA, AMPA). Option C involves nitric oxide signaling. Option D
describes growth factor receptors. NR546 requires understanding GPCR signaling
cascades for receptor pharmacology.
, Question 5
Which neurotransmitter receptor is ionotropic (ligand-gated ion channel) rather than
metabotropic (GPCR)?
A. 5-HT2A receptor
B. D2 receptor
C. NMDA receptor
D. Alpha-1 adrenergic receptor
Correct Answer: C
Rationale: NMDA is an ionotropic glutamate receptor (ligand-gated ion channel for Na+,
K+, Ca2+). Options A, B, and D are all metabotropic (GPCR). NMDA requires both
glutamate binding and membrane depolarization (removing Mg2+ block) for activation.
NR546 distinguishes ionotropic (fast, direct) from metabotropic (slow, second
messenger) receptor mechanisms.
Question 6
The HPA axis is hyperactive in many patients with major depression. Which sequence
correctly describes the HPA axis cascade?
A. CRH → ACTH → cortisol
B. ACTH → CRH → cortisol
C. Cortisol → CRH → ACTH
D. CRH → cortisol → ACTH
Correct Answer: A
Psychopharmacology for Psychiatric-Mental Health NP |
Questions & Verified Answers | Chamberlain | Pass
Guaranteed - A+ Graded
Aligned with 2026/2027 Chamberlain University NR546 Curriculum, ANCC PMHNP-BC
Competencies, & Evidence-Based Psychopharmacology Guidelines
Section 1: Neurobiology & Neurotransmitter Systems (Questions 1-12)
Question 1
A PMHNP is reviewing the neurobiology of schizophrenia. Positive symptoms
(hallucinations, delusions) are MOST associated with hyperactivity of which dopamine
pathway?
A. Mesocortical pathway
B. Mesolimbic pathway
C. Nigrostriatal pathway
D. Tuberoinfundibular pathway
Correct Answer: B
Rationale: The mesolimbic pathway (VTA to nucleus accumbens) is hyperactive in
positive symptoms of schizophrenia. Option A (mesocortical) is hypoactive in
negative/cognitive symptoms. Option C (nigrostriatal) is associated with EPS when D2
,is blocked. Option D (tuberoinfundibular) regulates prolactin; D2 blockade causes
hyperprolactinemia. NR546 emphasizes pathway-specific dopamine dysfunction as
foundational to psychopharmacology.
Question 2
Which receptor subtype is PRIMARILY responsible for antipsychotic efficacy, and its
blockade is also responsible for acute extrapyramidal symptoms (EPS)?
A. D1 receptor
B. D2 receptor
C. D3 receptor
D. D4 receptor
Correct Answer: B
Rationale: D2 receptor blockade is the primary mechanism for antipsychotic efficacy
and is responsible for acute EPS (dystonia, parkinsonism, akathisia). Option A (D1) is
not the primary antipsychotic target. Option C (D3) has affinity but is not the primary
efficacy receptor. Option D (D4) has minimal clinical relevance. NR546 teaches that D2
occupancy >65% correlates with efficacy, while >78% correlates with EPS.
Question 3
A patient presents with depression, anxiety, and insomnia. The PMHNP considers a
medication that acts on the 5-HT1A receptor. Activation of 5-HT1A autoreceptors in the
raphe nuclei results in:
A. Increased serotonin release
B. Decreased serotonin release (negative feedback)
,C. No change in serotonin release
D. Blockade of serotonin reuptake
Correct Answer: B
Rationale: 5-HT1A autoreceptors in the raphe nuclei mediate negative feedback;
activation decreases serotonin release. This explains the delayed onset of SSRIs (initial
5-HT increase → autoreceptor activation → decreased release → desensitization over
4-6 weeks → sustained increase). Option A is incorrect for autoreceptors. Option C is
false. Option D describes SERT inhibition, not 5-HT1A. NR546 emphasizes autoreceptor
desensitization as the mechanism for delayed antidepressant onset.
Question 4
Which second messenger system is activated when a G-protein coupled receptor
(GPCR) like the 5-HT2A receptor is stimulated?
A. Direct ligand-gated ion channel opening
B. Phospholipase C activation → IP3/DAG → calcium release and protein kinase C
activation
C. cGMP synthesis
D. Direct tyrosine kinase activation
Correct Answer: B
Rationale: 5-HT2A is a Gq-coupled receptor activating phospholipase C → IP3 (releases
intracellular calcium) and DAG (activates protein kinase C). Option A describes
ionotropic receptors (NMDA, AMPA). Option C involves nitric oxide signaling. Option D
describes growth factor receptors. NR546 requires understanding GPCR signaling
cascades for receptor pharmacology.
, Question 5
Which neurotransmitter receptor is ionotropic (ligand-gated ion channel) rather than
metabotropic (GPCR)?
A. 5-HT2A receptor
B. D2 receptor
C. NMDA receptor
D. Alpha-1 adrenergic receptor
Correct Answer: C
Rationale: NMDA is an ionotropic glutamate receptor (ligand-gated ion channel for Na+,
K+, Ca2+). Options A, B, and D are all metabotropic (GPCR). NMDA requires both
glutamate binding and membrane depolarization (removing Mg2+ block) for activation.
NR546 distinguishes ionotropic (fast, direct) from metabotropic (slow, second
messenger) receptor mechanisms.
Question 6
The HPA axis is hyperactive in many patients with major depression. Which sequence
correctly describes the HPA axis cascade?
A. CRH → ACTH → cortisol
B. ACTH → CRH → cortisol
C. Cortisol → CRH → ACTH
D. CRH → cortisol → ACTH
Correct Answer: A
