NR546 / NR 546 Final Exam Advanced
Pharmacology Psychopharmacology for the
PMHNP Questions With Correct Verified
Answers Guaranteed Pass (GRADED A+)
Foundational Neuroscience & Neurotransmission
1. Serotonin is primarily synthesized from which dietary
amino acid precursor?
o A. Tyrosine
o B. Tryptophan
o C. Phenylalanine
o D. Histidine
o Correct Answer: B. Tryptophan
o Rationale: Serotonin (5-hydroxytryptamine) is
synthesized from the amino acid tryptophan through a
two-step enzymatic process. Tyrosine is the precursor
for dopamine and norepinephrine, not serotonin.
2. The primary mechanism for terminating a dopamine
signal in the synaptic cleft is:
o A. Enzymatic degradation by monoamine oxidase only
o B. Reuptake into the presynaptic neuron via the
dopamine transporter (DAT)
o C. Diffusion out of the synaptic cleft
o D. Binding to presynaptic autoreceptors
o Correct Answer: B. Reuptake into the presynaptic
neuron via the dopamine transporter
, o Rationale: The dopamine transporter (DAT) is the
primary mechanism for clearing dopamine from the
synapse, terminating its signal. Enzymatic degradation
and diffusion play a secondary role.
3. GABA is classified as the primary inhibitory
neurotransmitter because it:
o A. Increases sodium influx to depolarize neurons
o B. Opens chloride channels to hyperpolarize neurons
and reduce firing
o C. Blocks calcium channels to prevent neurotransmitter
release
o D. Enhances glutamate activity at NMDA receptors
o Correct Answer: B. Opens chloride channels to
hyperpolarize neurons and reduce firing
o Rationale: GABA-A receptors are ligand-gated chloride
channels. When GABA binds, the channel opens,
allowing chloride ions to flow into the neuron, causing
hyperpolarization and making it less likely to fire.
4. Excessive dopaminergic activity in the mesolimbic
pathway is associated with:
o A. Negative symptoms of schizophrenia
o B. Positive symptoms of psychosis
o C. Parkinson's disease
o D. Depression
o Correct Answer: B. Positive symptoms of psychosis
o Rationale: The mesolimbic pathway, which projects
from the ventral tegmental area (VTA) to the nucleus
accumbens, is the brain's reward center. Overactivity in
, this pathway is linked to the positive symptoms of
schizophrenia, such as hallucinations and delusions.
5. Norepinephrine neurons in the locus coeruleus are
primarily involved in:
o A. Motor coordination
o B. Arousal, vigilance, and attention
o C. Memory consolidation
o D. Visual processing
o Correct Answer: B. Arousal, vigilance, and attention
o Rationale: The locus coeruleus is the primary source of
norepinephrine in the brain and projects widely to
influence arousal, wakefulness, and attention. Its
dysfunction is implicated in various psychiatric and
neurodegenerative disorders.
6. Glutamate is the primary __________ neurotransmitter in
the central nervous system.
o A. Inhibitory
o B. Excitatory
o C. Modulatory
o D. Retrograde
o Correct Answer: B. Excitatory
o Rationale: Glutamate is the most abundant excitatory
neurotransmitter and is involved in nearly all aspects of
normal brain function, including learning, memory, and
cognition.
7. The neurotrophic hypothesis of depression proposes that
chronic stress reduces levels of ____________, leading to
hippocampal atrophy.
o A. Dopamine
, o B. Serotonin
o C. Brain-derived neurotrophic factor (BDNF)
o D. GABA
o Correct Answer: C. Brain-derived neurotrophic
factor (BDNF)
o Rationale: This modern hypothesis moves beyond the
monoamine theory by focusing on neuroplasticity. It
posits that stress decreases BDNF, which is crucial for
neuronal survival and growth, leading to atrophy in
brain regions like the hippocampus, which may
contribute to depression.
8. Which pathway is associated with motor control and is
affected in Parkinson's disease?
o A. Mesolimbic pathway
o B. Mesocortical pathway
o C. Nigrostriatal pathway
o D. Tuberoinfundibular pathway
o Correct Answer: C. Nigrostriatal pathway
o Rationale: This pathway projects from the substantia
nigra to the striatum and is crucial for motor control.
Degeneration of dopamine neurons here causes the
motor symptoms of Parkinson's disease.
9. Which dopamine pathway is associated with reward,
motivation, and pleasure?
o A. Mesolimbic pathway
o B. Mesocortical pathway
o C. Nigrostriatal pathway
o D. Tuberoinfundibular pathway
o Correct Answer: A. Mesolimbic pathway
Pharmacology Psychopharmacology for the
PMHNP Questions With Correct Verified
Answers Guaranteed Pass (GRADED A+)
Foundational Neuroscience & Neurotransmission
1. Serotonin is primarily synthesized from which dietary
amino acid precursor?
o A. Tyrosine
o B. Tryptophan
o C. Phenylalanine
o D. Histidine
o Correct Answer: B. Tryptophan
o Rationale: Serotonin (5-hydroxytryptamine) is
synthesized from the amino acid tryptophan through a
two-step enzymatic process. Tyrosine is the precursor
for dopamine and norepinephrine, not serotonin.
2. The primary mechanism for terminating a dopamine
signal in the synaptic cleft is:
o A. Enzymatic degradation by monoamine oxidase only
o B. Reuptake into the presynaptic neuron via the
dopamine transporter (DAT)
o C. Diffusion out of the synaptic cleft
o D. Binding to presynaptic autoreceptors
o Correct Answer: B. Reuptake into the presynaptic
neuron via the dopamine transporter
, o Rationale: The dopamine transporter (DAT) is the
primary mechanism for clearing dopamine from the
synapse, terminating its signal. Enzymatic degradation
and diffusion play a secondary role.
3. GABA is classified as the primary inhibitory
neurotransmitter because it:
o A. Increases sodium influx to depolarize neurons
o B. Opens chloride channels to hyperpolarize neurons
and reduce firing
o C. Blocks calcium channels to prevent neurotransmitter
release
o D. Enhances glutamate activity at NMDA receptors
o Correct Answer: B. Opens chloride channels to
hyperpolarize neurons and reduce firing
o Rationale: GABA-A receptors are ligand-gated chloride
channels. When GABA binds, the channel opens,
allowing chloride ions to flow into the neuron, causing
hyperpolarization and making it less likely to fire.
4. Excessive dopaminergic activity in the mesolimbic
pathway is associated with:
o A. Negative symptoms of schizophrenia
o B. Positive symptoms of psychosis
o C. Parkinson's disease
o D. Depression
o Correct Answer: B. Positive symptoms of psychosis
o Rationale: The mesolimbic pathway, which projects
from the ventral tegmental area (VTA) to the nucleus
accumbens, is the brain's reward center. Overactivity in
, this pathway is linked to the positive symptoms of
schizophrenia, such as hallucinations and delusions.
5. Norepinephrine neurons in the locus coeruleus are
primarily involved in:
o A. Motor coordination
o B. Arousal, vigilance, and attention
o C. Memory consolidation
o D. Visual processing
o Correct Answer: B. Arousal, vigilance, and attention
o Rationale: The locus coeruleus is the primary source of
norepinephrine in the brain and projects widely to
influence arousal, wakefulness, and attention. Its
dysfunction is implicated in various psychiatric and
neurodegenerative disorders.
6. Glutamate is the primary __________ neurotransmitter in
the central nervous system.
o A. Inhibitory
o B. Excitatory
o C. Modulatory
o D. Retrograde
o Correct Answer: B. Excitatory
o Rationale: Glutamate is the most abundant excitatory
neurotransmitter and is involved in nearly all aspects of
normal brain function, including learning, memory, and
cognition.
7. The neurotrophic hypothesis of depression proposes that
chronic stress reduces levels of ____________, leading to
hippocampal atrophy.
o A. Dopamine
, o B. Serotonin
o C. Brain-derived neurotrophic factor (BDNF)
o D. GABA
o Correct Answer: C. Brain-derived neurotrophic
factor (BDNF)
o Rationale: This modern hypothesis moves beyond the
monoamine theory by focusing on neuroplasticity. It
posits that stress decreases BDNF, which is crucial for
neuronal survival and growth, leading to atrophy in
brain regions like the hippocampus, which may
contribute to depression.
8. Which pathway is associated with motor control and is
affected in Parkinson's disease?
o A. Mesolimbic pathway
o B. Mesocortical pathway
o C. Nigrostriatal pathway
o D. Tuberoinfundibular pathway
o Correct Answer: C. Nigrostriatal pathway
o Rationale: This pathway projects from the substantia
nigra to the striatum and is crucial for motor control.
Degeneration of dopamine neurons here causes the
motor symptoms of Parkinson's disease.
9. Which dopamine pathway is associated with reward,
motivation, and pleasure?
o A. Mesolimbic pathway
o B. Mesocortical pathway
o C. Nigrostriatal pathway
o D. Tuberoinfundibular pathway
o Correct Answer: A. Mesolimbic pathway
