NR546 2026
NR546 Advanced Pathophysiology and Pharmacology for Nurse Practitioners:
Complete Exam Bank with 200 Verified Questions and Correct Answers for the
2025/2026 Academic Year — Featuring Comprehensive Coverage of
Neurobiology, Antidepressants, Mood Stabilizers, Antipsychotics, Substance
Use Disorders, and Clinical Decision-Making for Psychiatric-Mental Health
Nurse Practitioner Certification
SECTION 1: NEUROTRANSMITTERS AND NEUROBIOLOGY
1. Which neurotransmitters are primarily increased by MAOIs?
A. GABA and glutamate
B. Serotonin, dopamine, norepinephrine
C. Acetylcholine only
D. Histamine and glycine
Answer: B
Rationale: MAOIs inhibit the breakdown of monoamines, increasing serotonin, dopamine, and
norepinephrine in the synaptic cleft .
2. The six main neurotransmitters are:
Answer: Serotonin (5HT), Norepinephrine (NE), Dopamine (DA), Acetylcholine (ACh), Glutamate
(Glu), and Gamma-aminobutyric acid (GABA) .
3. Which of the following is considered the pleasure center of the brain?
A. Cortico-striatal-thalamic-cortical loop
B. Mesolimbic dopamine pathway
C. Mesocortical dopamine pathway
D. None of the above
Answer: B
Rationale: The mesolimbic dopamine pathway, projecting from the ventral tegmental area (VTA) to
the nucleus accumbens, is the brain's primary reward and pleasure circuit. It is critically involved in
reinforcement, motivation, and addiction .
4. The reward pathway neurotransmitter is:
A. Serotonin
B. Dopamine
C. GABA
D. Acetylcholine
, NR546 2026
Answer: B
Rationale: Dopamine mediates reward and addiction through the mesolimbic pathway .
5. Which neurotransmitter system is most directly involved in the "reward pathway" and is heavily
targeted in addiction treatment?
A. Norepinephrine
B. Serotonin
C. Dopamine
D. Acetylcholine
Answer: C
Rationale: The mesolimbic dopamine pathway (VTA to NAc) is the primary circuit for reward and
reinforcement .
6. Glutamate is characterized as:
Answer: An excitatory amino acid neurotransmitter—the "workhorse" of the brain that can affect
almost every neuron. It influences energy, memory, learning, and neural plasticity. Too much
glutamate is associated with schizophrenia, epilepsy, and mania. Receptors include NMDA and
AMPA .
7. GABA is characterized as:
Answer: An inhibitory neurotransmitter that decreases neuroexcitability across the brain. It has a
calming effect, helping people relax, destress, and sleep. Too little GABA may result in anxiety or
schizophrenia. It slows down everything, even breathing, and affects executive function and motor
coordination .
8. Norepinephrine is characterized as:
Answer: A monoamine neurotransmitter responsible for focus and productivity. Too much (due to
stress, medications, caffeine, stimulants) can cause nervousness, antsiness, and affect focus. It
regulates fight-or-flight responses and can impact mood and sleep .
9. Serotonin (5HT) is characterized as:
Answer: Helps regulate mood, making one feel relaxed and comfortable. Decreases stress, regulates
sleep, arousal, libido, aggression, and pain perception .
10. Examples of neurotransmitters produced specifically as retrograde neurotransmitters include:
, NR546 2026
A. GABA
B. Galanin
C. Histamine
D. Nitric oxide
Answer: D
Rationale: Nitric oxide (NO) and endocannabinoids are the primary retrograde neurotransmitters.
They are synthesized postsynaptically and diffuse backward across the synapse to modulate
presynaptic neurotransmitter release .
11. An example of volume neurotransmission is:
A. Dopamine in the prefrontal cortex
B. Dopamine in the striatum
C. Norepinephrine in the prefrontal cortex
D. Norepinephrine in the striatum
Answer: A
Rationale: Volume transmission (nonsynaptic diffusion) occurs when neurotransmitters diffuse away
from the synaptic cleft to act on distant receptors. In the prefrontal cortex, dopamine exhibits
volume transmission due to lower dopamine transporter density and less structured synaptic
architecture compared to the striatum .
12. Signal transduction cascades can produce:
Answer: Downstream (delayed) and/or long-lasting effects. This explains why some
psychopharmacological drugs do not provide an immediate response but require time to see drug
effects. These cascades involve communication from the genome of the presynaptic neuron to the
genome of the postsynaptic neuron and back via retrograde neurotransmission .
SECTION 2: MAJOR DEPRESSIVE DISORDER & ANTIDEPRESSANTS
13. First-line pharmacologic treatment for major depressive disorder is:
A. MAOIs
B. TCAs
C. SSRIs
D. Antipsychotics
Answer: C
Rationale: SSRIs are first-line treatment due to their favorable safety and tolerability profile .
14. Which SSRI is safest in overdose?
, NR546 2026
A. Fluoxetine
B. Paroxetine
C. Sertraline
D. Citalopram
Answer: C
Rationale: Sertraline has a wide safety margin and fewer cardiac effects in overdose .
15. Which antidepressant is best for a patient with poor medication adherence?
A. Fluoxetine
B. Paroxetine
C. Trazodone
D. Venlafaxine
Answer: A
Rationale: Fluoxetine has a long half-life, reducing withdrawal risk and allowing for missed doses
without significant symptom return .
16. Duloxetine acts on which neurotransmitters?
A. Serotonin and dopamine
B. Serotonin and norepinephrine
C. GABA and glutamate
D. Acetylcholine and histamine
Answer: B
Rationale: Duloxetine is an SNRI that increases both serotonin and norepinephrine .
17. Best antidepressant for an elderly patient with weight loss and poor appetite:
A. Bupropion
B. Mirtazapine
C. Fluoxetine
D. Sertraline
Answer: B
Rationale: Mirtazapine increases appetite and promotes weight gain due to its H1 antagonism and
5-HT2C antagonism .
18. A patient with MDD and comorbid nicotine dependence is requesting an antidepressant that
does not cause weight gain or sexual side effects. Which is the most appropriate choice?
A. Mirtazapine
B. Bupropion
NR546 Advanced Pathophysiology and Pharmacology for Nurse Practitioners:
Complete Exam Bank with 200 Verified Questions and Correct Answers for the
2025/2026 Academic Year — Featuring Comprehensive Coverage of
Neurobiology, Antidepressants, Mood Stabilizers, Antipsychotics, Substance
Use Disorders, and Clinical Decision-Making for Psychiatric-Mental Health
Nurse Practitioner Certification
SECTION 1: NEUROTRANSMITTERS AND NEUROBIOLOGY
1. Which neurotransmitters are primarily increased by MAOIs?
A. GABA and glutamate
B. Serotonin, dopamine, norepinephrine
C. Acetylcholine only
D. Histamine and glycine
Answer: B
Rationale: MAOIs inhibit the breakdown of monoamines, increasing serotonin, dopamine, and
norepinephrine in the synaptic cleft .
2. The six main neurotransmitters are:
Answer: Serotonin (5HT), Norepinephrine (NE), Dopamine (DA), Acetylcholine (ACh), Glutamate
(Glu), and Gamma-aminobutyric acid (GABA) .
3. Which of the following is considered the pleasure center of the brain?
A. Cortico-striatal-thalamic-cortical loop
B. Mesolimbic dopamine pathway
C. Mesocortical dopamine pathway
D. None of the above
Answer: B
Rationale: The mesolimbic dopamine pathway, projecting from the ventral tegmental area (VTA) to
the nucleus accumbens, is the brain's primary reward and pleasure circuit. It is critically involved in
reinforcement, motivation, and addiction .
4. The reward pathway neurotransmitter is:
A. Serotonin
B. Dopamine
C. GABA
D. Acetylcholine
, NR546 2026
Answer: B
Rationale: Dopamine mediates reward and addiction through the mesolimbic pathway .
5. Which neurotransmitter system is most directly involved in the "reward pathway" and is heavily
targeted in addiction treatment?
A. Norepinephrine
B. Serotonin
C. Dopamine
D. Acetylcholine
Answer: C
Rationale: The mesolimbic dopamine pathway (VTA to NAc) is the primary circuit for reward and
reinforcement .
6. Glutamate is characterized as:
Answer: An excitatory amino acid neurotransmitter—the "workhorse" of the brain that can affect
almost every neuron. It influences energy, memory, learning, and neural plasticity. Too much
glutamate is associated with schizophrenia, epilepsy, and mania. Receptors include NMDA and
AMPA .
7. GABA is characterized as:
Answer: An inhibitory neurotransmitter that decreases neuroexcitability across the brain. It has a
calming effect, helping people relax, destress, and sleep. Too little GABA may result in anxiety or
schizophrenia. It slows down everything, even breathing, and affects executive function and motor
coordination .
8. Norepinephrine is characterized as:
Answer: A monoamine neurotransmitter responsible for focus and productivity. Too much (due to
stress, medications, caffeine, stimulants) can cause nervousness, antsiness, and affect focus. It
regulates fight-or-flight responses and can impact mood and sleep .
9. Serotonin (5HT) is characterized as:
Answer: Helps regulate mood, making one feel relaxed and comfortable. Decreases stress, regulates
sleep, arousal, libido, aggression, and pain perception .
10. Examples of neurotransmitters produced specifically as retrograde neurotransmitters include:
, NR546 2026
A. GABA
B. Galanin
C. Histamine
D. Nitric oxide
Answer: D
Rationale: Nitric oxide (NO) and endocannabinoids are the primary retrograde neurotransmitters.
They are synthesized postsynaptically and diffuse backward across the synapse to modulate
presynaptic neurotransmitter release .
11. An example of volume neurotransmission is:
A. Dopamine in the prefrontal cortex
B. Dopamine in the striatum
C. Norepinephrine in the prefrontal cortex
D. Norepinephrine in the striatum
Answer: A
Rationale: Volume transmission (nonsynaptic diffusion) occurs when neurotransmitters diffuse away
from the synaptic cleft to act on distant receptors. In the prefrontal cortex, dopamine exhibits
volume transmission due to lower dopamine transporter density and less structured synaptic
architecture compared to the striatum .
12. Signal transduction cascades can produce:
Answer: Downstream (delayed) and/or long-lasting effects. This explains why some
psychopharmacological drugs do not provide an immediate response but require time to see drug
effects. These cascades involve communication from the genome of the presynaptic neuron to the
genome of the postsynaptic neuron and back via retrograde neurotransmission .
SECTION 2: MAJOR DEPRESSIVE DISORDER & ANTIDEPRESSANTS
13. First-line pharmacologic treatment for major depressive disorder is:
A. MAOIs
B. TCAs
C. SSRIs
D. Antipsychotics
Answer: C
Rationale: SSRIs are first-line treatment due to their favorable safety and tolerability profile .
14. Which SSRI is safest in overdose?
, NR546 2026
A. Fluoxetine
B. Paroxetine
C. Sertraline
D. Citalopram
Answer: C
Rationale: Sertraline has a wide safety margin and fewer cardiac effects in overdose .
15. Which antidepressant is best for a patient with poor medication adherence?
A. Fluoxetine
B. Paroxetine
C. Trazodone
D. Venlafaxine
Answer: A
Rationale: Fluoxetine has a long half-life, reducing withdrawal risk and allowing for missed doses
without significant symptom return .
16. Duloxetine acts on which neurotransmitters?
A. Serotonin and dopamine
B. Serotonin and norepinephrine
C. GABA and glutamate
D. Acetylcholine and histamine
Answer: B
Rationale: Duloxetine is an SNRI that increases both serotonin and norepinephrine .
17. Best antidepressant for an elderly patient with weight loss and poor appetite:
A. Bupropion
B. Mirtazapine
C. Fluoxetine
D. Sertraline
Answer: B
Rationale: Mirtazapine increases appetite and promotes weight gain due to its H1 antagonism and
5-HT2C antagonism .
18. A patient with MDD and comorbid nicotine dependence is requesting an antidepressant that
does not cause weight gain or sexual side effects. Which is the most appropriate choice?
A. Mirtazapine
B. Bupropion
