,NR 546 Advanced Psychopharmacology PMHNP Week 2 | Questions and Answers +
Rationales | 2026/27 Updates | 100% correct
1. Which of the following is the primary inhibitory neurotransmitter in the central nervous
system?
A) Glutamate
B) Dopamine
C) Gamma-aminobutyric acid (GABA)
D) Norepinephrine
Correct Answer: Gamma-aminobutyric acid (GABA)
Rationale: GABA is the chief inhibitory neurotransmitter in the CNS, working to decrease
neuroexcitability across the brain . It produces a calming effect, helps individuals relax, and is
crucial for managing stress and sleep. Decreased levels of GABA are associated with anxiety and
schizophrenia .
2. A client with schizophrenia is experiencing positive symptoms such as hallucinations and
delusions. Which neurotransmitter system is most implicated in these symptoms?
A) Serotonin
B) Norepinephrine
C) Dopamine
D) Acetylcholine
Correct Answer: Dopamine
Rationale: The dopamine hypothesis of schizophrenia suggests that an excess of dopamine,
particularly in the mesolimbic pathway, is responsible for positive symptoms like hallucinations
,and delusions . Antipsychotic medications work primarily by blocking dopamine receptors to
reduce these symptoms.
3. A client presents with symptoms of depression. According to NR546, which neurotransmitter
imbalances are most likely contributing to their symptoms? (Select all that apply)
A) Decreased levels of norepinephrine
B) Decreased levels of serotonin
C) Increased levels of acetylcholine
D) Increased levels of glutamate
Correct Answer: Decreased levels of norepinephrine; Decreased levels of serotonin; Increased
levels of acetylcholine; Increased levels of glutamate
Rationale: Depression is linked to imbalances in several neurotransmitters. Research indicates
that decreased levels of norepinephrine and serotonin are common . Additionally, increased
levels of acetylcholine and glutamate can also contribute to depressive symptoms .
4. What is the mechanism of action of a medication that acts as a "full agonist" at a receptor?
A) It blocks the receptor, preventing activation
B) It fully stimulates the receptor, producing the maximum possible effect
C) It stimulates the receptor but with a lower effect than a full agonist
D) It has no effect on the receptor
Correct Answer: It fully stimulates the receptor, producing the maximum possible effect
Rationale: By definition, a full agonist binds to a receptor and fully activates it, producing a
maximal biological response . This is in contrast to a partial agonist, which produces a
submaximal response, or an antagonist, which blocks the receptor.
, 5. What is the role of signal transduction cascades in psychopharmacology?
A) To produce immediate effects from medication
B) To explain the delayed onset of action of many psychiatric drugs
C) To metabolize drugs in the liver
D) To transport neurotransmitters across the synaptic cleft
Correct Answer: To explain the delayed onset of action of many psychiatric drugs
Rationale: Signal transduction cascades are intracellular signaling pathways that are activated
by neurotransmitter binding to G-protein-linked receptors . These cascades can take weeks to
produce their downstream effects on gene expression and protein synthesis, which is a primary
reason why many psychotropic medications, like antidepressants and antipsychotics, require
several weeks to reach their full therapeutic effect .
6. The Flockhart Table is a clinical tool used to identify:
A) Neurotransmitter imbalances
B) Drug interactions mediated by the cytochrome P450 system
C) Common side effects of SSRIs
D) Which medications are approved for off-label use
Correct Answer: Drug interactions mediated by the cytochrome P450 system
Rationale: The Flockhart Table is a comprehensive and widely used resource that lists
significant drug interactions mediated by the cytochrome P450 (CYP450) enzyme system . It
helps clinicians predict how one drug might affect the metabolism of another.
Rationales | 2026/27 Updates | 100% correct
1. Which of the following is the primary inhibitory neurotransmitter in the central nervous
system?
A) Glutamate
B) Dopamine
C) Gamma-aminobutyric acid (GABA)
D) Norepinephrine
Correct Answer: Gamma-aminobutyric acid (GABA)
Rationale: GABA is the chief inhibitory neurotransmitter in the CNS, working to decrease
neuroexcitability across the brain . It produces a calming effect, helps individuals relax, and is
crucial for managing stress and sleep. Decreased levels of GABA are associated with anxiety and
schizophrenia .
2. A client with schizophrenia is experiencing positive symptoms such as hallucinations and
delusions. Which neurotransmitter system is most implicated in these symptoms?
A) Serotonin
B) Norepinephrine
C) Dopamine
D) Acetylcholine
Correct Answer: Dopamine
Rationale: The dopamine hypothesis of schizophrenia suggests that an excess of dopamine,
particularly in the mesolimbic pathway, is responsible for positive symptoms like hallucinations
,and delusions . Antipsychotic medications work primarily by blocking dopamine receptors to
reduce these symptoms.
3. A client presents with symptoms of depression. According to NR546, which neurotransmitter
imbalances are most likely contributing to their symptoms? (Select all that apply)
A) Decreased levels of norepinephrine
B) Decreased levels of serotonin
C) Increased levels of acetylcholine
D) Increased levels of glutamate
Correct Answer: Decreased levels of norepinephrine; Decreased levels of serotonin; Increased
levels of acetylcholine; Increased levels of glutamate
Rationale: Depression is linked to imbalances in several neurotransmitters. Research indicates
that decreased levels of norepinephrine and serotonin are common . Additionally, increased
levels of acetylcholine and glutamate can also contribute to depressive symptoms .
4. What is the mechanism of action of a medication that acts as a "full agonist" at a receptor?
A) It blocks the receptor, preventing activation
B) It fully stimulates the receptor, producing the maximum possible effect
C) It stimulates the receptor but with a lower effect than a full agonist
D) It has no effect on the receptor
Correct Answer: It fully stimulates the receptor, producing the maximum possible effect
Rationale: By definition, a full agonist binds to a receptor and fully activates it, producing a
maximal biological response . This is in contrast to a partial agonist, which produces a
submaximal response, or an antagonist, which blocks the receptor.
, 5. What is the role of signal transduction cascades in psychopharmacology?
A) To produce immediate effects from medication
B) To explain the delayed onset of action of many psychiatric drugs
C) To metabolize drugs in the liver
D) To transport neurotransmitters across the synaptic cleft
Correct Answer: To explain the delayed onset of action of many psychiatric drugs
Rationale: Signal transduction cascades are intracellular signaling pathways that are activated
by neurotransmitter binding to G-protein-linked receptors . These cascades can take weeks to
produce their downstream effects on gene expression and protein synthesis, which is a primary
reason why many psychotropic medications, like antidepressants and antipsychotics, require
several weeks to reach their full therapeutic effect .
6. The Flockhart Table is a clinical tool used to identify:
A) Neurotransmitter imbalances
B) Drug interactions mediated by the cytochrome P450 system
C) Common side effects of SSRIs
D) Which medications are approved for off-label use
Correct Answer: Drug interactions mediated by the cytochrome P450 system
Rationale: The Flockhart Table is a comprehensive and widely used resource that lists
significant drug interactions mediated by the cytochrome P450 (CYP450) enzyme system . It
helps clinicians predict how one drug might affect the metabolism of another.
