NSG 552 Exam 1 | Psychopharmacology | Wilkes University 75 Questions | 75 Minutes
NSG 552 / NSG552 Exam 1 (Latest ):
Psychopharmacology - Wilkes University
Grade A Questions and Verified Answers | 100% Correct
Wilkes University Passan School of Nursing | 75 Questions | 75 Minutes | 2026-2027 Curriculum
Section 1: Neurobiology and Neurotransmission Fundamentals
Questions 1–15 | Synaptic Transmission, Neurotransmitter Systems, Receptor Types, Signal
Transduction, Brain Regions
Q1: During synaptic transmission, which of the following is the correct sequence of events at a chemical synapse?
A. Action potential arrives, voltage-gated Ca²⁺ channels open, vesicle fusion, neurotransmitter release into synaptic cleft,
receptor binding **[CORRECT]**
B. Neurotransmitter release, receptor binding, voltage-gated Ca²⁺ channels open, vesicle fusion, action potential propagation
C. Voltage-gated Na⁺ channels open at the synapse, Ca²⁺ influx, neurotransmitter synthesis, vesicle docking, receptor
activation
D. Receptor binding, G-protein activation, second messenger formation, Ca²⁺ influx, vesicle fusion and neurotransmitter
release
Correct Answer: A
Rationale: The correct sequence of chemical synaptic transmission begins with an action potential reaching the presynaptic terminal, which
opens voltage-gated calcium channels. Calcium influx triggers synaptic vesicle fusion with the presynaptic membrane and neurotransmitter
release into the synaptic cleft, where it binds to postsynaptic receptors. Options B, C, and D reverse the sequence or describe events out of order,
reflecting a fundamental misunderstanding of presynaptic-to-postsynaptic signaling covered in NSG 552.
Q2: A nurse practitioner is explaining the mechanism of action potential propagation to a patient. Which statement accurately
describes the all-or-nothing principle of action potentials?
A. Action potentials vary in amplitude depending on stimulus intensity
B. Once the threshold potential (−55 mV) is reached, the action potential fires at full amplitude regardless of further stimulus
strength **[CORRECT]**
C. Action potentials require continuous neurotransmitter release to be sustained along the axon
D. The refractory period allows graded potentials to summate and generate a larger action potential
Correct Answer: B
Rationale: The all-or-nothing principle states that once membrane depolarization reaches threshold (approximately −55 mV), the action
potential is generated at full amplitude and cannot be partially fired. This is a foundational concept in neurobiology essential for understanding
how neurons transmit signals. Option A describes graded potentials, not action potentials; option C confuses action potential propagation with
synaptic transmission; and option D mischaracterizes the refractory period, which prevents backward propagation rather than enabling
summation.
Q3: A patient taking a serotonergic antidepressant reports improvement in mood, sleep, and appetite. Which neurotransmitter
system is most directly responsible for regulating all three of these domains?
A. Dopamine
B. Norepinephrine
C. Gamma-aminobutyric acid (GABA)
D. Serotonin (5-hydroxytryptamine, 5-HT) **[CORRECT]**
Correct Answer: D
Rationale: Serotonin (5-HT) is the primary neurotransmitter involved in the regulation of mood, sleep, and appetite, which is why SSRIs and
other serotonergic agents effectively address these symptoms in depression and anxiety disorders. While dopamine (A) regulates reward and
motor function, norepinephrine (B) mediates arousal and stress responses, and GABA (C) is the primary inhibitory neurotransmitter, none of
these simultaneously govern mood, sleep, and appetite. This triad of symptom domains is a hallmark of serotonergic dysfunction emphasized in
Page 1
,NSG 552 Exam 1 | Psychopharmacology | Wilkes University 75 Questions | 75 Minutes
the NSG 552 curriculum.
Q4: Which brain region is most critically implicated in the pathophysiology of major depressive disorder due to its role in
emotional regulation and is a target for deep brain stimulation in treatment-resistant depression?
A. Prefrontal cortex
B. Basal ganglia
C. Limbic system (specifically the amygdala and hippocampus) **[CORRECT]**
D. Hypothalamus
Correct Answer: C
Rationale: The limbic system, particularly the amygdala (hyperactive in depression, mediating negative emotional processing) and hippocampus
(involved in memory and HPA axis regulation with documented volume reductions in depression), is most critically implicated in MDD
pathophysiology. While the prefrontal cortex (A) is also involved in executive function deficits in depression, the limbic system is the primary
emotional circuit. The basal ganglia (B) govern motor function and are more associated with movement disorders, and the hypothalamus (D)
regulates autonomic and endocrine functions rather than directly mediating emotional dysregulation.
Q5: A patient with Parkinson’s disease exhibits tremor, bradykinesia, and rigidity. Degeneration of dopaminergic neurons in
which brain region is the primary cause of these motor symptoms?
A. Substantia nigra pars compacta **[CORRECT]**
B. Ventral tegmental area (VTA)
C. Caudate nucleus
D. Globus pallidus
Correct Answer: A
Rationale: The substantia nigra pars compacta (SNpc) is the primary site of dopaminergic neuron degeneration in Parkinson’s disease, leading
to dopamine depletion in the nigrostriatal pathway and the classic motor triad of tremor, bradykinesia, and rigidity. The VTA (B) is part of the
mesolimbic/mesocortical pathways involved in reward and cognition, not primarily motor control. The caudate nucleus (C) and globus pallidus
(D) are components of the basal ganglia that receive dopaminergic input but are not the site of primary neuronal loss. This distinction between
dopamine pathways is a key NSG 552 learning objective.
Q6: A nurse practitioner is considering pharmacotherapy for a patient with generalized anxiety disorder. Enhancement of
which neurotransmitter system would provide the most direct anxiolytic effect?
A. Glutamate
B. Norepinephrine
C. Gamma-aminobutyric acid (GABA) **[CORRECT]**
D. Dopamine
Correct Answer: C
Rationale: GABA is the primary inhibitory neurotransmitter in the CNS, and enhancing GABAergic transmission is the mechanism of
benzodiazepines, the most direct anxiolytic agents. GABA-A receptor activation increases chloride ion influx, hyperpolarizing the neuron and
reducing neuronal excitability. Glutamate (A) is excitatory and would worsen anxiety; norepinephrine (B) promotes arousal and would be
countertherapeutic; dopamine (D) is primarily involved in reward and motor pathways. Understanding GABA’s inhibitory role is fundamental
to the NSG 552 psychopharmacology curriculum.
Q7: Which of the following best describes the difference between G protein-coupled receptors (GPCRs) and ionotropic
receptors?
A. GPCRs directly open ion channels, while ionotropic receptors activate second messenger systems
B. GPCRs are metabotropic and signal through second messengers (e.g., cAMP, IP3, DAG), while ionotropic receptors are
ligand-gated ion channels that directly mediate fast synaptic transmission **[CORRECT]**
C. Ionotropic receptors have slower onset and longer duration compared to GPCRs
D. GPCRs only bind catecholamines, while ionotropic receptors only bind amino acid neurotransmitters
Correct Answer: B
Rationale: GPCRs are metabotropic receptors that activate G-proteins and second messenger cascades (cAMP, IP3, DAG), producing slower
but prolonged effects—examples include 5-HT1A, beta-adrenergic, and muscarinic receptors. Ionotropic receptors (e.g., GABA-A, NMDA,
Page 2
, NSG 552 Exam 1 | Psychopharmacology | Wilkes University 75 Questions | 75 Minutes
nicotinic) are ligand-gated ion channels that directly open pores for rapid synaptic transmission. Option A reverses the definitions. Option C is
incorrect because ionotropic receptors have faster onset, not slower. Option D is incorrect because both receptor classes can bind various
neurotransmitter types. This receptor classification is essential NSG 552 content.
Q8: When a beta-adrenergic receptor is activated by norepinephrine, which second messenger system is primarily activated?
A. Inositol triphosphate (IP3) and diacylglycerol (DAG) pathway
B. Adenylyl cyclase → cAMP → protein kinase A (PKA) pathway **[CORRECT]**
C. Tyrosine kinase pathway
D. Nitric oxide synthase pathway
Correct Answer: B
Rationale: Beta-adrenergic receptors are Gs-coupled GPCRs that activate adenylyl cyclase, converting ATP to cyclic AMP (cAMP), which then
activates protein kinase A (PKA) to phosphorylate downstream targets. The IP3/DAG pathway (A) is associated with Gq-coupled receptors
(e.g., 5-HT2, alpha-1 adrenergic, muscarinic M1). The tyrosine kinase pathway (C) is associated with growth factor receptors, and the nitric
oxide pathway (D) is a distinct signaling mechanism. Differentiating Gs, Gi, and Gq second messenger systems is a core NSG 552
pharmacology concept.
Q9: Glutamate is the primary excitatory neurotransmitter in the CNS. Which receptor type mediates fast excitatory synaptic
transmission and is blocked by the drug memantine, used in Alzheimer’s disease?
A. AMPA receptor
B. Kainate receptor
C. NMDA receptor **[CORRECT]**
D. Metabotropic glutamate receptor (mGluR)
Correct Answer: C
Rationale: The NMDA receptor is a glutamate-gated ion channel that mediates fast excitatory transmission and is critically involved in synaptic
plasticity, learning, and memory. Memantine is a low-affinity NMDA receptor antagonist used in Alzheimer’s disease to reduce excitotoxicity.
AMPA (A) and kainate (B) receptors also mediate fast excitatory transmission but are not the target of memantine. Metabotropic glutamate
receptors (D) are GPCRs, not ion channels, and signal through second messengers. Understanding glutamate receptor subtypes is a key NSG
552 objective.
Q10: A patient prescribed an MAOI reports eating aged cheese and develops a severe headache, hypertension, and
diaphoresis. This reaction is caused by which mechanism?
A. Excessive serotonin release from presynaptic terminals
B. Accumulation of tyramine leading to massive norepinephrine release from adrenergic nerve endings **[CORRECT]**
C. Direct alpha-1 adrenergic receptor agonism by tyramine
D. Inhibition of COMT leading to catecholamine accumulation
Correct Answer: B
Rationale: Tyramine is a pressor amine normally metabolized by monoamine oxidase (MAO) in the gut and liver. MAOIs block this enzyme,
allowing dietary tyramine to be absorbed systemically and displace norepinephrine from presynaptic vesicles, causing a hypertensive crisis. This
is an indirect mechanism—tyramine does not directly stimulate alpha-1 receptors (C), nor does it cause serotonin release (A). COMT inhibition
(D) is the mechanism of entacapone, not MAOIs. This dietary restriction is a critical patient safety point in the NSG 552 curriculum.
Q11: The prefrontal cortex is responsible for which of the following cognitive functions that are commonly impaired in
psychiatric disorders?
A. Emotional memory consolidation and fear conditioning
B. Executive function, working memory, decision-making, and impulse control **[CORRECT]**
C. Motor coordination and procedural learning
D. Circadian rhythm regulation and appetite control
Correct Answer: B
Rationale: The prefrontal cortex (PFC) is the seat of executive function, including working memory, decision-making, planning, and impulse
control—all impaired in depression, schizophrenia, and ADHD. Emotional memory consolidation and fear conditioning (A) are functions of
the amygdala and hippocampus within the limbic system. Motor coordination and procedural learning (C) are mediated by the basal ganglia
and cerebellum. Circadian and appetite regulation (D) are primarily hypothalamic functions. These brain region-function correlations are
Page 3
NSG 552 / NSG552 Exam 1 (Latest ):
Psychopharmacology - Wilkes University
Grade A Questions and Verified Answers | 100% Correct
Wilkes University Passan School of Nursing | 75 Questions | 75 Minutes | 2026-2027 Curriculum
Section 1: Neurobiology and Neurotransmission Fundamentals
Questions 1–15 | Synaptic Transmission, Neurotransmitter Systems, Receptor Types, Signal
Transduction, Brain Regions
Q1: During synaptic transmission, which of the following is the correct sequence of events at a chemical synapse?
A. Action potential arrives, voltage-gated Ca²⁺ channels open, vesicle fusion, neurotransmitter release into synaptic cleft,
receptor binding **[CORRECT]**
B. Neurotransmitter release, receptor binding, voltage-gated Ca²⁺ channels open, vesicle fusion, action potential propagation
C. Voltage-gated Na⁺ channels open at the synapse, Ca²⁺ influx, neurotransmitter synthesis, vesicle docking, receptor
activation
D. Receptor binding, G-protein activation, second messenger formation, Ca²⁺ influx, vesicle fusion and neurotransmitter
release
Correct Answer: A
Rationale: The correct sequence of chemical synaptic transmission begins with an action potential reaching the presynaptic terminal, which
opens voltage-gated calcium channels. Calcium influx triggers synaptic vesicle fusion with the presynaptic membrane and neurotransmitter
release into the synaptic cleft, where it binds to postsynaptic receptors. Options B, C, and D reverse the sequence or describe events out of order,
reflecting a fundamental misunderstanding of presynaptic-to-postsynaptic signaling covered in NSG 552.
Q2: A nurse practitioner is explaining the mechanism of action potential propagation to a patient. Which statement accurately
describes the all-or-nothing principle of action potentials?
A. Action potentials vary in amplitude depending on stimulus intensity
B. Once the threshold potential (−55 mV) is reached, the action potential fires at full amplitude regardless of further stimulus
strength **[CORRECT]**
C. Action potentials require continuous neurotransmitter release to be sustained along the axon
D. The refractory period allows graded potentials to summate and generate a larger action potential
Correct Answer: B
Rationale: The all-or-nothing principle states that once membrane depolarization reaches threshold (approximately −55 mV), the action
potential is generated at full amplitude and cannot be partially fired. This is a foundational concept in neurobiology essential for understanding
how neurons transmit signals. Option A describes graded potentials, not action potentials; option C confuses action potential propagation with
synaptic transmission; and option D mischaracterizes the refractory period, which prevents backward propagation rather than enabling
summation.
Q3: A patient taking a serotonergic antidepressant reports improvement in mood, sleep, and appetite. Which neurotransmitter
system is most directly responsible for regulating all three of these domains?
A. Dopamine
B. Norepinephrine
C. Gamma-aminobutyric acid (GABA)
D. Serotonin (5-hydroxytryptamine, 5-HT) **[CORRECT]**
Correct Answer: D
Rationale: Serotonin (5-HT) is the primary neurotransmitter involved in the regulation of mood, sleep, and appetite, which is why SSRIs and
other serotonergic agents effectively address these symptoms in depression and anxiety disorders. While dopamine (A) regulates reward and
motor function, norepinephrine (B) mediates arousal and stress responses, and GABA (C) is the primary inhibitory neurotransmitter, none of
these simultaneously govern mood, sleep, and appetite. This triad of symptom domains is a hallmark of serotonergic dysfunction emphasized in
Page 1
,NSG 552 Exam 1 | Psychopharmacology | Wilkes University 75 Questions | 75 Minutes
the NSG 552 curriculum.
Q4: Which brain region is most critically implicated in the pathophysiology of major depressive disorder due to its role in
emotional regulation and is a target for deep brain stimulation in treatment-resistant depression?
A. Prefrontal cortex
B. Basal ganglia
C. Limbic system (specifically the amygdala and hippocampus) **[CORRECT]**
D. Hypothalamus
Correct Answer: C
Rationale: The limbic system, particularly the amygdala (hyperactive in depression, mediating negative emotional processing) and hippocampus
(involved in memory and HPA axis regulation with documented volume reductions in depression), is most critically implicated in MDD
pathophysiology. While the prefrontal cortex (A) is also involved in executive function deficits in depression, the limbic system is the primary
emotional circuit. The basal ganglia (B) govern motor function and are more associated with movement disorders, and the hypothalamus (D)
regulates autonomic and endocrine functions rather than directly mediating emotional dysregulation.
Q5: A patient with Parkinson’s disease exhibits tremor, bradykinesia, and rigidity. Degeneration of dopaminergic neurons in
which brain region is the primary cause of these motor symptoms?
A. Substantia nigra pars compacta **[CORRECT]**
B. Ventral tegmental area (VTA)
C. Caudate nucleus
D. Globus pallidus
Correct Answer: A
Rationale: The substantia nigra pars compacta (SNpc) is the primary site of dopaminergic neuron degeneration in Parkinson’s disease, leading
to dopamine depletion in the nigrostriatal pathway and the classic motor triad of tremor, bradykinesia, and rigidity. The VTA (B) is part of the
mesolimbic/mesocortical pathways involved in reward and cognition, not primarily motor control. The caudate nucleus (C) and globus pallidus
(D) are components of the basal ganglia that receive dopaminergic input but are not the site of primary neuronal loss. This distinction between
dopamine pathways is a key NSG 552 learning objective.
Q6: A nurse practitioner is considering pharmacotherapy for a patient with generalized anxiety disorder. Enhancement of
which neurotransmitter system would provide the most direct anxiolytic effect?
A. Glutamate
B. Norepinephrine
C. Gamma-aminobutyric acid (GABA) **[CORRECT]**
D. Dopamine
Correct Answer: C
Rationale: GABA is the primary inhibitory neurotransmitter in the CNS, and enhancing GABAergic transmission is the mechanism of
benzodiazepines, the most direct anxiolytic agents. GABA-A receptor activation increases chloride ion influx, hyperpolarizing the neuron and
reducing neuronal excitability. Glutamate (A) is excitatory and would worsen anxiety; norepinephrine (B) promotes arousal and would be
countertherapeutic; dopamine (D) is primarily involved in reward and motor pathways. Understanding GABA’s inhibitory role is fundamental
to the NSG 552 psychopharmacology curriculum.
Q7: Which of the following best describes the difference between G protein-coupled receptors (GPCRs) and ionotropic
receptors?
A. GPCRs directly open ion channels, while ionotropic receptors activate second messenger systems
B. GPCRs are metabotropic and signal through second messengers (e.g., cAMP, IP3, DAG), while ionotropic receptors are
ligand-gated ion channels that directly mediate fast synaptic transmission **[CORRECT]**
C. Ionotropic receptors have slower onset and longer duration compared to GPCRs
D. GPCRs only bind catecholamines, while ionotropic receptors only bind amino acid neurotransmitters
Correct Answer: B
Rationale: GPCRs are metabotropic receptors that activate G-proteins and second messenger cascades (cAMP, IP3, DAG), producing slower
but prolonged effects—examples include 5-HT1A, beta-adrenergic, and muscarinic receptors. Ionotropic receptors (e.g., GABA-A, NMDA,
Page 2
, NSG 552 Exam 1 | Psychopharmacology | Wilkes University 75 Questions | 75 Minutes
nicotinic) are ligand-gated ion channels that directly open pores for rapid synaptic transmission. Option A reverses the definitions. Option C is
incorrect because ionotropic receptors have faster onset, not slower. Option D is incorrect because both receptor classes can bind various
neurotransmitter types. This receptor classification is essential NSG 552 content.
Q8: When a beta-adrenergic receptor is activated by norepinephrine, which second messenger system is primarily activated?
A. Inositol triphosphate (IP3) and diacylglycerol (DAG) pathway
B. Adenylyl cyclase → cAMP → protein kinase A (PKA) pathway **[CORRECT]**
C. Tyrosine kinase pathway
D. Nitric oxide synthase pathway
Correct Answer: B
Rationale: Beta-adrenergic receptors are Gs-coupled GPCRs that activate adenylyl cyclase, converting ATP to cyclic AMP (cAMP), which then
activates protein kinase A (PKA) to phosphorylate downstream targets. The IP3/DAG pathway (A) is associated with Gq-coupled receptors
(e.g., 5-HT2, alpha-1 adrenergic, muscarinic M1). The tyrosine kinase pathway (C) is associated with growth factor receptors, and the nitric
oxide pathway (D) is a distinct signaling mechanism. Differentiating Gs, Gi, and Gq second messenger systems is a core NSG 552
pharmacology concept.
Q9: Glutamate is the primary excitatory neurotransmitter in the CNS. Which receptor type mediates fast excitatory synaptic
transmission and is blocked by the drug memantine, used in Alzheimer’s disease?
A. AMPA receptor
B. Kainate receptor
C. NMDA receptor **[CORRECT]**
D. Metabotropic glutamate receptor (mGluR)
Correct Answer: C
Rationale: The NMDA receptor is a glutamate-gated ion channel that mediates fast excitatory transmission and is critically involved in synaptic
plasticity, learning, and memory. Memantine is a low-affinity NMDA receptor antagonist used in Alzheimer’s disease to reduce excitotoxicity.
AMPA (A) and kainate (B) receptors also mediate fast excitatory transmission but are not the target of memantine. Metabotropic glutamate
receptors (D) are GPCRs, not ion channels, and signal through second messengers. Understanding glutamate receptor subtypes is a key NSG
552 objective.
Q10: A patient prescribed an MAOI reports eating aged cheese and develops a severe headache, hypertension, and
diaphoresis. This reaction is caused by which mechanism?
A. Excessive serotonin release from presynaptic terminals
B. Accumulation of tyramine leading to massive norepinephrine release from adrenergic nerve endings **[CORRECT]**
C. Direct alpha-1 adrenergic receptor agonism by tyramine
D. Inhibition of COMT leading to catecholamine accumulation
Correct Answer: B
Rationale: Tyramine is a pressor amine normally metabolized by monoamine oxidase (MAO) in the gut and liver. MAOIs block this enzyme,
allowing dietary tyramine to be absorbed systemically and displace norepinephrine from presynaptic vesicles, causing a hypertensive crisis. This
is an indirect mechanism—tyramine does not directly stimulate alpha-1 receptors (C), nor does it cause serotonin release (A). COMT inhibition
(D) is the mechanism of entacapone, not MAOIs. This dietary restriction is a critical patient safety point in the NSG 552 curriculum.
Q11: The prefrontal cortex is responsible for which of the following cognitive functions that are commonly impaired in
psychiatric disorders?
A. Emotional memory consolidation and fear conditioning
B. Executive function, working memory, decision-making, and impulse control **[CORRECT]**
C. Motor coordination and procedural learning
D. Circadian rhythm regulation and appetite control
Correct Answer: B
Rationale: The prefrontal cortex (PFC) is the seat of executive function, including working memory, decision-making, planning, and impulse
control—all impaired in depression, schizophrenia, and ADHD. Emotional memory consolidation and fear conditioning (A) are functions of
the amygdala and hippocampus within the limbic system. Motor coordination and procedural learning (C) are mediated by the basal ganglia
and cerebellum. Circadian and appetite regulation (D) are primarily hypothalamic functions. These brain region-function correlations are
Page 3
