NSG552 / NSG 552 Exam 1
Psychopharmacology | Complete Review
Questions and Verified Answers | 100% Correct | Grade A
Latest Update
Wilkes University Passan School of Nursing
75 Multiple-Choice Questions
Section I: Neurobiology of Psychopharmacology (Questions 1-15)
1. A psychiatric nurse practitioner is explaining the mechanism of serotonin reuptake inhibition to a nursing
student. Which of the following best describes the primary mechanism by which SSRIs exert their therapeutic
effect?
A. They directly stimulate postsynaptic 5-HT1A receptors in the raphe nuclei
B. They block the serotonin transporter (SERT), increasing serotonin availability in the synaptic cleft
[CORRECT]
C. They inhibit monoamine oxidase type A (MAO-A), preventing serotonin degradation
D. They antagonize 5-HT2A and 5-HT2C receptors, modulating serotonin downstream signaling
Correct Answer: B
Rationale: SSRIs selectively block the serotonin transporter (SERT) on presynaptic neurons, preventing the reuptake of serotonin
from the synaptic cleft back into the presynaptic terminal. This increases the concentration of serotonin available to bind
postsynaptic receptors, which over time leads to downstream adaptations including desensitization of presynaptic autoreceptors
and enhanced serotonergic neurotransmission. Options A, C, and D describe mechanisms of action for buspirone (5-HT1A
partial agonist), MAOIs, and atypical antipsychotics respectively.
2. A patient with major depressive disorder begins treatment with an SSRI. The nurse practitioner explains that
therapeutic effects are not immediate. What is the neurobiological basis for the delayed onset of action of SSRIs,
typically 2 to 4 weeks?
A. SSRIs require hepatic biotransformation to an active metabolite before receptor binding can occur
B. Downregulation of presynaptic autoreceptors and adaptive changes in postsynaptic receptor signaling require
time [CORRECT]
C. Blood-brain barrier permeability limits initial CNS penetration of SSRIs by approximately 80%
D. Serotonin synthesis rates in the dorsal raphe nucleus are initially too low for synaptic accumulation
Correct Answer: B
Rationale: Although SSRIs increase synaptic serotonin within hours, the therapeutic effect is delayed because downstream
neuroadaptive changes are required. Acute SERT blockade leads to activation of presynaptic 5-HT1A autoreceptors via excess
synaptic serotonin, which initially reduces serotonergic firing. Over 2 to 4 weeks, these autoreceptors desensitize and
downregulate, allowing increased serotonin neuronal firing and enhanced postsynaptic receptor activation. Postsynaptic receptor
NSG552 Psychopharmacology | Wilkes University Passan School of Nursing
,NSG552 Exam 1 | Psychopharmacology Complete Review | Wilkes University Latest 2026/2027 Update
adaptations, including changes in BDNF expression and neuroplasticity in the hippocampus, also contribute to the delayed
antidepressant effect.
3. A nurse practitioner is reviewing the mesolimbic dopamine pathway with a patient diagnosed with
schizophrenia. Which clinical manifestation is most directly associated with dysregulation of the mesolimbic
pathway?
A. Bradykinesia and resting tremor
B. Visual hallucinations and cognitive disorganization
C. Positive symptoms such as hallucinations and delusions [CORRECT]
D. Apathy, anhedonia, and alogia
Correct Answer: C
Rationale: The mesolimbic dopamine pathway projects from the ventral tegmental area (VTA) to the nucleus accumbens and
other limbic structures. Hyperactivity of this pathway is strongly associated with positive symptoms of schizophrenia, including
auditory and visual hallucinations, delusions, and thought disorganization. Option A describes nigrostriatal pathway dysfunction
(extrapyramidal symptoms). Option B is not specifically tied to a single dopamine pathway. Option D describes negative
symptoms associated with mesocortical pathway hypofrontality and diminished prefrontal dopamine activity.
4. A nursing student asks about GABA, the primary inhibitory neurotransmitter. Which statement accurately
describes the GABA-A receptor and its clinical significance in psychopharmacology?
A. GABA-A receptors are metabotropic and activate second messenger systems via G-protein coupling
B. Benzodiazepines bind to a site on the GABA-A receptor complex and enhance GABA-mediated chloride
influx [CORRECT]
C. GABA-A receptors are exclusively responsible for postsynaptic inhibition in the cerebellum and spinal cord
D. Buspirone acts as a direct agonist at the GABA-A receptor benzodiazepine binding site
Correct Answer: B
Rationale: The GABA-A receptor is a ligand-gated ion channel (ionotropic receptor) composed of five subunits surrounding a
central chloride ion pore. Benzodiazepines bind to an allosteric site on the GABA-A receptor complex, enhancing the affinity of
GABA for its binding site, increasing the frequency of chloride channel opening. This produces anxiolytic, sedative, muscle
relaxant, and anticonvulsant effects. Option A incorrectly describes GABA-B receptors (metabotropic). Option C is false because
GABA-A receptors are widely distributed throughout the CNS. Option D is incorrect because buspirone is a 5-HT1A partial
agonist, not a GABA-A ligand.
5. A patient prescribed an antipsychotic develops extrapyramidal symptoms (EPS). The nurse practitioner
recognizes that this is most likely due to blockade of dopamine receptors in which pathway?
A. Mesolimbic pathway
B. Mesocortical pathway
C. Nigrostriatal pathway [CORRECT]
D. Tuberoinfundibular pathway
Correct Answer: C
Rationale: The nigrostriatal pathway projects from the substantia nigra to the caudate nucleus and putamen (striatum) and
regulates motor movement. Dopamine D2 receptor blockade in this pathway by antipsychotic medications leads to
extrapyramidal symptoms, including acute dystonia, akathisia, pseudoparkinsonism (bradykinesia, rigidity, tremor), and tardive
dyskinesia with chronic use. The mesolimbic pathway (Option A) is associated with positive symptom control. The mesocortical
pathway (Option B) is associated with negative and cognitive symptoms. The tuberoinfundibular pathway (Option D) is
associated with prolactin elevation.
Page 2
, NSG552 Exam 1 | Psychopharmacology Complete Review | Wilkes University Latest 2026/2027 Update
6. A patient taking a first-generation antipsychotic develops galactorrhea and amenorrhea. The nurse practitioner
understands that this is caused by dopamine D2 receptor blockade in which anatomical pathway?
A. Nigrostriatal pathway
B. Tuberoinfundibular pathway [CORRECT]
C. Mesocortical pathway
D. Mesolimbic pathway
Correct Answer: B
Rationale: The tuberoinfundibular pathway projects from the hypothalamus (arcuate nucleus) to the pituitary gland. Dopamine
normally tonically inhibits prolactin release from the anterior pituitary lactotrophs. When antipsychotic medications block D2
receptors in this pathway, the inhibitory effect of dopamine on prolactin secretion is removed, leading to hyperprolactinemia.
Clinical manifestations include galactorrhea, amenorrhea or menstrual irregularities, gynecomastia, decreased libido, and
sexual dysfunction. This side effect is more common with first-generation antipsychotics and risperidone.
7. A nurse practitioner is teaching about glutamate, the primary excitatory neurotransmitter in the CNS. Which
of the following is the most clinically relevant glutamate receptor in the pathophysiology of mood disorders?
A. Kainate receptor
B. AMPA receptor
C. NMDA receptor [CORRECT]
D. Metabotropic glutamate receptor 1 (mGluR1)
Correct Answer: C
Rationale: The NMDA (N-methyl-D-aspartate) receptor is the most clinically relevant glutamate receptor in mood disorder
pathophysiology. Ketamine, an NMDA receptor antagonist, produces rapid antidepressant effects, supporting the role of
glutamatergic dysfunction in depression. NMDA receptor overactivation leads to excessive calcium influx and excitotoxicity,
implicated in neuronal atrophy in the hippocampus and prefrontal cortex in chronic depression. Ketamine blocks NMDA
receptors on GABAergic interneurons, leading to a glutamate surge activating AMPA receptors and downstream BDNF/mTOR
cascades, promoting synaptic plasticity.
8. A graduate nursing student is studying signal transduction. Which second messenger system is most directly
activated by norepinephrine binding to a beta-1 adrenergic receptor?
A. Phospholipase C (PLC) pathway generating IP3 and DAG
B. Adenylate cyclase-cAMP-protein kinase A (PKA) pathway [CORRECT]
C. Tyrosine kinase pathway activating MAPK/ERK
D. Phospholipase A2 (PLA2) pathway generating arachidonic acid
Correct Answer: B
Rationale: Beta-1 adrenergic receptors are Gs protein-coupled receptors. When norepinephrine binds, the Gs protein activates
adenylate cyclase, converting ATP to cAMP. The increased cAMP then activates protein kinase A (PKA), which phosphorylates
downstream target proteins. This cascade is critical in mediating norepinephrine effects on alertness, attention, and
cardiovascular function. Alpha-1 receptors activate the PLC pathway (Option A), and insulin receptors involve the tyrosine
kinase pathway (Option C).
9. A patient with depression is found to have reduced hippocampal volume on MRI. The nurse practitioner
explains that chronic stress and elevated cortisol affect which neurotrophic factor critical for neuronal survival
and synaptic plasticity?
A. Nerve growth factor (NGF)
B. Brain-derived neurotrophic factor (BDNF) [CORRECT]
Page 3
Psychopharmacology | Complete Review
Questions and Verified Answers | 100% Correct | Grade A
Latest Update
Wilkes University Passan School of Nursing
75 Multiple-Choice Questions
Section I: Neurobiology of Psychopharmacology (Questions 1-15)
1. A psychiatric nurse practitioner is explaining the mechanism of serotonin reuptake inhibition to a nursing
student. Which of the following best describes the primary mechanism by which SSRIs exert their therapeutic
effect?
A. They directly stimulate postsynaptic 5-HT1A receptors in the raphe nuclei
B. They block the serotonin transporter (SERT), increasing serotonin availability in the synaptic cleft
[CORRECT]
C. They inhibit monoamine oxidase type A (MAO-A), preventing serotonin degradation
D. They antagonize 5-HT2A and 5-HT2C receptors, modulating serotonin downstream signaling
Correct Answer: B
Rationale: SSRIs selectively block the serotonin transporter (SERT) on presynaptic neurons, preventing the reuptake of serotonin
from the synaptic cleft back into the presynaptic terminal. This increases the concentration of serotonin available to bind
postsynaptic receptors, which over time leads to downstream adaptations including desensitization of presynaptic autoreceptors
and enhanced serotonergic neurotransmission. Options A, C, and D describe mechanisms of action for buspirone (5-HT1A
partial agonist), MAOIs, and atypical antipsychotics respectively.
2. A patient with major depressive disorder begins treatment with an SSRI. The nurse practitioner explains that
therapeutic effects are not immediate. What is the neurobiological basis for the delayed onset of action of SSRIs,
typically 2 to 4 weeks?
A. SSRIs require hepatic biotransformation to an active metabolite before receptor binding can occur
B. Downregulation of presynaptic autoreceptors and adaptive changes in postsynaptic receptor signaling require
time [CORRECT]
C. Blood-brain barrier permeability limits initial CNS penetration of SSRIs by approximately 80%
D. Serotonin synthesis rates in the dorsal raphe nucleus are initially too low for synaptic accumulation
Correct Answer: B
Rationale: Although SSRIs increase synaptic serotonin within hours, the therapeutic effect is delayed because downstream
neuroadaptive changes are required. Acute SERT blockade leads to activation of presynaptic 5-HT1A autoreceptors via excess
synaptic serotonin, which initially reduces serotonergic firing. Over 2 to 4 weeks, these autoreceptors desensitize and
downregulate, allowing increased serotonin neuronal firing and enhanced postsynaptic receptor activation. Postsynaptic receptor
NSG552 Psychopharmacology | Wilkes University Passan School of Nursing
,NSG552 Exam 1 | Psychopharmacology Complete Review | Wilkes University Latest 2026/2027 Update
adaptations, including changes in BDNF expression and neuroplasticity in the hippocampus, also contribute to the delayed
antidepressant effect.
3. A nurse practitioner is reviewing the mesolimbic dopamine pathway with a patient diagnosed with
schizophrenia. Which clinical manifestation is most directly associated with dysregulation of the mesolimbic
pathway?
A. Bradykinesia and resting tremor
B. Visual hallucinations and cognitive disorganization
C. Positive symptoms such as hallucinations and delusions [CORRECT]
D. Apathy, anhedonia, and alogia
Correct Answer: C
Rationale: The mesolimbic dopamine pathway projects from the ventral tegmental area (VTA) to the nucleus accumbens and
other limbic structures. Hyperactivity of this pathway is strongly associated with positive symptoms of schizophrenia, including
auditory and visual hallucinations, delusions, and thought disorganization. Option A describes nigrostriatal pathway dysfunction
(extrapyramidal symptoms). Option B is not specifically tied to a single dopamine pathway. Option D describes negative
symptoms associated with mesocortical pathway hypofrontality and diminished prefrontal dopamine activity.
4. A nursing student asks about GABA, the primary inhibitory neurotransmitter. Which statement accurately
describes the GABA-A receptor and its clinical significance in psychopharmacology?
A. GABA-A receptors are metabotropic and activate second messenger systems via G-protein coupling
B. Benzodiazepines bind to a site on the GABA-A receptor complex and enhance GABA-mediated chloride
influx [CORRECT]
C. GABA-A receptors are exclusively responsible for postsynaptic inhibition in the cerebellum and spinal cord
D. Buspirone acts as a direct agonist at the GABA-A receptor benzodiazepine binding site
Correct Answer: B
Rationale: The GABA-A receptor is a ligand-gated ion channel (ionotropic receptor) composed of five subunits surrounding a
central chloride ion pore. Benzodiazepines bind to an allosteric site on the GABA-A receptor complex, enhancing the affinity of
GABA for its binding site, increasing the frequency of chloride channel opening. This produces anxiolytic, sedative, muscle
relaxant, and anticonvulsant effects. Option A incorrectly describes GABA-B receptors (metabotropic). Option C is false because
GABA-A receptors are widely distributed throughout the CNS. Option D is incorrect because buspirone is a 5-HT1A partial
agonist, not a GABA-A ligand.
5. A patient prescribed an antipsychotic develops extrapyramidal symptoms (EPS). The nurse practitioner
recognizes that this is most likely due to blockade of dopamine receptors in which pathway?
A. Mesolimbic pathway
B. Mesocortical pathway
C. Nigrostriatal pathway [CORRECT]
D. Tuberoinfundibular pathway
Correct Answer: C
Rationale: The nigrostriatal pathway projects from the substantia nigra to the caudate nucleus and putamen (striatum) and
regulates motor movement. Dopamine D2 receptor blockade in this pathway by antipsychotic medications leads to
extrapyramidal symptoms, including acute dystonia, akathisia, pseudoparkinsonism (bradykinesia, rigidity, tremor), and tardive
dyskinesia with chronic use. The mesolimbic pathway (Option A) is associated with positive symptom control. The mesocortical
pathway (Option B) is associated with negative and cognitive symptoms. The tuberoinfundibular pathway (Option D) is
associated with prolactin elevation.
Page 2
, NSG552 Exam 1 | Psychopharmacology Complete Review | Wilkes University Latest 2026/2027 Update
6. A patient taking a first-generation antipsychotic develops galactorrhea and amenorrhea. The nurse practitioner
understands that this is caused by dopamine D2 receptor blockade in which anatomical pathway?
A. Nigrostriatal pathway
B. Tuberoinfundibular pathway [CORRECT]
C. Mesocortical pathway
D. Mesolimbic pathway
Correct Answer: B
Rationale: The tuberoinfundibular pathway projects from the hypothalamus (arcuate nucleus) to the pituitary gland. Dopamine
normally tonically inhibits prolactin release from the anterior pituitary lactotrophs. When antipsychotic medications block D2
receptors in this pathway, the inhibitory effect of dopamine on prolactin secretion is removed, leading to hyperprolactinemia.
Clinical manifestations include galactorrhea, amenorrhea or menstrual irregularities, gynecomastia, decreased libido, and
sexual dysfunction. This side effect is more common with first-generation antipsychotics and risperidone.
7. A nurse practitioner is teaching about glutamate, the primary excitatory neurotransmitter in the CNS. Which
of the following is the most clinically relevant glutamate receptor in the pathophysiology of mood disorders?
A. Kainate receptor
B. AMPA receptor
C. NMDA receptor [CORRECT]
D. Metabotropic glutamate receptor 1 (mGluR1)
Correct Answer: C
Rationale: The NMDA (N-methyl-D-aspartate) receptor is the most clinically relevant glutamate receptor in mood disorder
pathophysiology. Ketamine, an NMDA receptor antagonist, produces rapid antidepressant effects, supporting the role of
glutamatergic dysfunction in depression. NMDA receptor overactivation leads to excessive calcium influx and excitotoxicity,
implicated in neuronal atrophy in the hippocampus and prefrontal cortex in chronic depression. Ketamine blocks NMDA
receptors on GABAergic interneurons, leading to a glutamate surge activating AMPA receptors and downstream BDNF/mTOR
cascades, promoting synaptic plasticity.
8. A graduate nursing student is studying signal transduction. Which second messenger system is most directly
activated by norepinephrine binding to a beta-1 adrenergic receptor?
A. Phospholipase C (PLC) pathway generating IP3 and DAG
B. Adenylate cyclase-cAMP-protein kinase A (PKA) pathway [CORRECT]
C. Tyrosine kinase pathway activating MAPK/ERK
D. Phospholipase A2 (PLA2) pathway generating arachidonic acid
Correct Answer: B
Rationale: Beta-1 adrenergic receptors are Gs protein-coupled receptors. When norepinephrine binds, the Gs protein activates
adenylate cyclase, converting ATP to cAMP. The increased cAMP then activates protein kinase A (PKA), which phosphorylates
downstream target proteins. This cascade is critical in mediating norepinephrine effects on alertness, attention, and
cardiovascular function. Alpha-1 receptors activate the PLC pathway (Option A), and insulin receptors involve the tyrosine
kinase pathway (Option C).
9. A patient with depression is found to have reduced hippocampal volume on MRI. The nurse practitioner
explains that chronic stress and elevated cortisol affect which neurotrophic factor critical for neuronal survival
and synaptic plasticity?
A. Nerve growth factor (NGF)
B. Brain-derived neurotrophic factor (BDNF) [CORRECT]
Page 3
