NR 546 ADVANCED PHARMACOLOGY: PSYCHOPHARMACOLOGY
FOR THE PMHNP — COMPREHENSIVE FINAL EXAM BANK 350
MULTIPLE-CHOICE QUESTIONS WITH CORRECT ANSWERS AND
DETAILED RATIONALES
Section 1: Neurobiology, Neurotransmitters & Receptors (Questions 1–35)
1. A 34-year-old patient with major depressive disorder has significantly reduced
serotonin activity. The PMHNP understands that serotonin is primarily
synthesized from which dietary amino acid precursor?
A. Tyrosine
B. Tryptophan
C. Phenylalanine
D. Histidine
Correct Answer: B
Rationale: Serotonin is synthesized from the amino acid tryptophan through the
enzymatic action of tryptophan hydroxylase and aromatic amino acid
decarboxylase. Tyrosine is the precursor for dopamine and norepinephrine, not
serotonin.
2. A PMHNP is explaining the mechanism of dopaminergic signaling to a medical
student. The presynaptic neuron releases dopamine into the synaptic cleft, where
it binds to postsynaptic receptors. The primary mechanism for terminating this
dopamine signal is:
,A. Enzymatic degradation by monoamine oxidase only
B. Reuptake into the presynaptic neuron via the dopamine transporter
C. Diffusion out of the synaptic cleft into surrounding glial cells
D. Binding to presynaptic autoreceptors causing signal cessation
Correct Answer: B
Rationale: The primary mechanism for terminating dopamine signaling is reuptake
into the presynaptic neuron via the dopamine transporter (DAT). While MAO
enzymes do degrade dopamine, reuptake is the primary termination mechanism.
3. A researcher is studying the role of gamma-aminobutyric acid in the central
nervous system. GABA is classified as the primary inhibitory neurotransmitter
because it:
A. Increases sodium influx to depolarize neurons
B. Opens chloride channels to hyperpolarize neurons and reduce firing
C. Blocks calcium channels to prevent neurotransmitter release
D. Enhances glutamate activity at NMDA receptors
Correct Answer: B
Rationale: GABA-A receptors open chloride channels, allowing chloride influx that
hyperpolarizes the neuron and makes it less likely to fire. This inhibitory action
contrasts with glutamate, which is excitatory and depolarizes neurons.
,4. Which dopamine pathway is primarily responsible for the development of
extrapyramidal symptoms when D2 receptors are blocked by antipsychotic
medications?
A. Mesolimbic pathway
B. Nigrostriatal pathway
C. Mesocortical pathway
D. Tuberoinfundibular pathway
Correct Answer: B
Rationale: The nigrostriatal pathway controls motor function; blockade of D2
receptors here results in extrapyramidal symptoms. The mesolimbic pathway
relates to reward, the mesocortical pathway to cognition and negative symptoms,
and the tuberoinfundibular pathway to prolactin regulation.
5. Hyperactivity of dopamine D2 receptors in which specific pathway is primarily
responsible for the positive symptoms of psychosis?
A. Nigrostriatal pathway
B. Mesolimbic pathway
C. Tuberoinfundibular pathway
D. Mesocortical pathway
Correct Answer: B
Rationale: Hyperactivity of dopamine D2 receptors in the mesolimbic pathway is
responsible for the positive symptoms of psychosis, such as hallucinations and
delusions.
, 6. Which neurotransmitter system is primarily associated with the therapeutic
effects of atypical antipsychotics in treating the negative symptoms of
schizophrenia?
A. Dopamine D2 antagonism
B. Serotonin 5-HT2A antagonism
C. Norepinephrine reuptake inhibition
D. GABA receptor modulation
Correct Answer: B
Rationale: Serotonin 5-HT2A antagonism is the primary mechanism by which
atypical antipsychotics exert therapeutic effects on negative symptoms of
schizophrenia.
7. A patient presents with a resting tremor, cogwheel rigidity, and bradykinesia
after starting haloperidol. Which brain structure is most directly implicated in
these findings?
A. Hippocampus
B. Basal ganglia
C. Amygdala
D. Thalamus
Correct Answer: B
FOR THE PMHNP — COMPREHENSIVE FINAL EXAM BANK 350
MULTIPLE-CHOICE QUESTIONS WITH CORRECT ANSWERS AND
DETAILED RATIONALES
Section 1: Neurobiology, Neurotransmitters & Receptors (Questions 1–35)
1. A 34-year-old patient with major depressive disorder has significantly reduced
serotonin activity. The PMHNP understands that serotonin is primarily
synthesized from which dietary amino acid precursor?
A. Tyrosine
B. Tryptophan
C. Phenylalanine
D. Histidine
Correct Answer: B
Rationale: Serotonin is synthesized from the amino acid tryptophan through the
enzymatic action of tryptophan hydroxylase and aromatic amino acid
decarboxylase. Tyrosine is the precursor for dopamine and norepinephrine, not
serotonin.
2. A PMHNP is explaining the mechanism of dopaminergic signaling to a medical
student. The presynaptic neuron releases dopamine into the synaptic cleft, where
it binds to postsynaptic receptors. The primary mechanism for terminating this
dopamine signal is:
,A. Enzymatic degradation by monoamine oxidase only
B. Reuptake into the presynaptic neuron via the dopamine transporter
C. Diffusion out of the synaptic cleft into surrounding glial cells
D. Binding to presynaptic autoreceptors causing signal cessation
Correct Answer: B
Rationale: The primary mechanism for terminating dopamine signaling is reuptake
into the presynaptic neuron via the dopamine transporter (DAT). While MAO
enzymes do degrade dopamine, reuptake is the primary termination mechanism.
3. A researcher is studying the role of gamma-aminobutyric acid in the central
nervous system. GABA is classified as the primary inhibitory neurotransmitter
because it:
A. Increases sodium influx to depolarize neurons
B. Opens chloride channels to hyperpolarize neurons and reduce firing
C. Blocks calcium channels to prevent neurotransmitter release
D. Enhances glutamate activity at NMDA receptors
Correct Answer: B
Rationale: GABA-A receptors open chloride channels, allowing chloride influx that
hyperpolarizes the neuron and makes it less likely to fire. This inhibitory action
contrasts with glutamate, which is excitatory and depolarizes neurons.
,4. Which dopamine pathway is primarily responsible for the development of
extrapyramidal symptoms when D2 receptors are blocked by antipsychotic
medications?
A. Mesolimbic pathway
B. Nigrostriatal pathway
C. Mesocortical pathway
D. Tuberoinfundibular pathway
Correct Answer: B
Rationale: The nigrostriatal pathway controls motor function; blockade of D2
receptors here results in extrapyramidal symptoms. The mesolimbic pathway
relates to reward, the mesocortical pathway to cognition and negative symptoms,
and the tuberoinfundibular pathway to prolactin regulation.
5. Hyperactivity of dopamine D2 receptors in which specific pathway is primarily
responsible for the positive symptoms of psychosis?
A. Nigrostriatal pathway
B. Mesolimbic pathway
C. Tuberoinfundibular pathway
D. Mesocortical pathway
Correct Answer: B
Rationale: Hyperactivity of dopamine D2 receptors in the mesolimbic pathway is
responsible for the positive symptoms of psychosis, such as hallucinations and
delusions.
, 6. Which neurotransmitter system is primarily associated with the therapeutic
effects of atypical antipsychotics in treating the negative symptoms of
schizophrenia?
A. Dopamine D2 antagonism
B. Serotonin 5-HT2A antagonism
C. Norepinephrine reuptake inhibition
D. GABA receptor modulation
Correct Answer: B
Rationale: Serotonin 5-HT2A antagonism is the primary mechanism by which
atypical antipsychotics exert therapeutic effects on negative symptoms of
schizophrenia.
7. A patient presents with a resting tremor, cogwheel rigidity, and bradykinesia
after starting haloperidol. Which brain structure is most directly implicated in
these findings?
A. Hippocampus
B. Basal ganglia
C. Amygdala
D. Thalamus
Correct Answer: B
