Stahl's Essential Psychopharmacology
Neuroscientific Basis and Practical Applications
5th Edition
Author(s)Stephen M. Stahl
TEST BANK
Question 1
Reference: Ch. 1, Chemical Neurotransmission
Question Stem: A patient with major depressive disorder is
prescribed a selective serotonin reuptake inhibitor (SSRI). Based
on the principle of chemical neurotransmission, what is the
primary mechanism by which this medication is intended to
exert its therapeutic effect in the synaptic cleft?
Options:
A) Acting as a serotonin receptor antagonist to downregulate
overactive pathways
B) Blocking the enzymatic degradation of serotonin within the
synaptic cleft
C) Inhibiting the reuptake of serotonin into the presynaptic
neuron
,D) Directly binding to and activating postsynaptic serotonin
receptors
Correct Answer: C
Rationales:
• Correct Option (C): SSRIs work selectively on the serotonin
transporter (SERT), blocking the reuptake of serotonin
from the synaptic cleft back into the presynaptic neuron.
This increases the concentration and duration of action of
serotonin in the synapse, enhancing neurotransmission.
• Incorrect Option (A): This describes the action of some
atypical antipsychotics (e.g., 5-HT2A antagonism), not the
mechanism of SSRIs.
• Incorrect Option (B): This is the mechanism of monoamine
oxidase inhibitors (MAOIs), which prevent the breakdown
of serotonin inside the neuron, not in the cleft.
• Incorrect Option (D): This describes the action of a direct
receptor agonist, which SSRIs are not. They work indirectly
by modulating neurotransmitter availability.
Teaching Point: SSRIs increase synaptic serotonin by blocking its
reuptake via the SERT transporter.
Citation: Stahl's Essential Psychopharmacology, 5th Ed., Ch. 1.
Question 2
,Reference: Ch. 1, Signal Transduction and Chemical Messengers
Question Stem: A new antipsychotic medication is described as
having its primary action as a "D2 receptor partial agonist."
What is the expected functional outcome of this mechanism on
dopamine neurotransmission?
Options:
A) It completely blocks dopamine from binding, effectively
shutting down the pathway.
B) It provides a submaximal dopamine effect while blocking full
agonists like dopamine itself.
C) It directly inhibits the synthesis of dopamine in the
presynaptic neuron.
D) It enhances the release of dopamine from the presynaptic
neuron.
Correct Answer: B
Rationales:
• Correct Option (B): A partial agonist has intrinsic activity
that is greater than an antagonist but less than a full
agonist. It stabilizes the system by providing moderate
functional activity while simultaneously competing with
and reducing the effect of the full agonist (dopamine).
• Incorrect Option (A): This describes the action of a pure
D2 receptor antagonist, not a partial agonist.
, • Incorrect Option (C): This is not a primary receptor-
mediated action; synthesis is controlled by enzymes like
tyrosine hydroxylase.
• Incorrect Option (D): This would be a presynaptic action,
not the primary postsynaptic receptor mechanism of a
partial agonist.
Teaching Point: A partial agonist acts as a functional stabilizer,
providing moderate activity while blocking the full agonist.
Citation: Stahl's Essential Psychopharmacology, 5th Ed., Ch. 1.
Question 3
Reference: Ch. 1, Neurotransmitters and Receptors
Question Stem: A nursing student is teaching a patient about
the "fight or flight" response. Which neurotransmitter, released
directly from the adrenal medulla and from sympathetic nerve
endings, is most directly responsible for the systemic effects like
increased heart rate and blood pressure?
Options:
A) Serotonin
B) Dopamine
C) Norepinephrine
D) Acetylcholine
Correct Answer: C
Rationales:
Neuroscientific Basis and Practical Applications
5th Edition
Author(s)Stephen M. Stahl
TEST BANK
Question 1
Reference: Ch. 1, Chemical Neurotransmission
Question Stem: A patient with major depressive disorder is
prescribed a selective serotonin reuptake inhibitor (SSRI). Based
on the principle of chemical neurotransmission, what is the
primary mechanism by which this medication is intended to
exert its therapeutic effect in the synaptic cleft?
Options:
A) Acting as a serotonin receptor antagonist to downregulate
overactive pathways
B) Blocking the enzymatic degradation of serotonin within the
synaptic cleft
C) Inhibiting the reuptake of serotonin into the presynaptic
neuron
,D) Directly binding to and activating postsynaptic serotonin
receptors
Correct Answer: C
Rationales:
• Correct Option (C): SSRIs work selectively on the serotonin
transporter (SERT), blocking the reuptake of serotonin
from the synaptic cleft back into the presynaptic neuron.
This increases the concentration and duration of action of
serotonin in the synapse, enhancing neurotransmission.
• Incorrect Option (A): This describes the action of some
atypical antipsychotics (e.g., 5-HT2A antagonism), not the
mechanism of SSRIs.
• Incorrect Option (B): This is the mechanism of monoamine
oxidase inhibitors (MAOIs), which prevent the breakdown
of serotonin inside the neuron, not in the cleft.
• Incorrect Option (D): This describes the action of a direct
receptor agonist, which SSRIs are not. They work indirectly
by modulating neurotransmitter availability.
Teaching Point: SSRIs increase synaptic serotonin by blocking its
reuptake via the SERT transporter.
Citation: Stahl's Essential Psychopharmacology, 5th Ed., Ch. 1.
Question 2
,Reference: Ch. 1, Signal Transduction and Chemical Messengers
Question Stem: A new antipsychotic medication is described as
having its primary action as a "D2 receptor partial agonist."
What is the expected functional outcome of this mechanism on
dopamine neurotransmission?
Options:
A) It completely blocks dopamine from binding, effectively
shutting down the pathway.
B) It provides a submaximal dopamine effect while blocking full
agonists like dopamine itself.
C) It directly inhibits the synthesis of dopamine in the
presynaptic neuron.
D) It enhances the release of dopamine from the presynaptic
neuron.
Correct Answer: B
Rationales:
• Correct Option (B): A partial agonist has intrinsic activity
that is greater than an antagonist but less than a full
agonist. It stabilizes the system by providing moderate
functional activity while simultaneously competing with
and reducing the effect of the full agonist (dopamine).
• Incorrect Option (A): This describes the action of a pure
D2 receptor antagonist, not a partial agonist.
, • Incorrect Option (C): This is not a primary receptor-
mediated action; synthesis is controlled by enzymes like
tyrosine hydroxylase.
• Incorrect Option (D): This would be a presynaptic action,
not the primary postsynaptic receptor mechanism of a
partial agonist.
Teaching Point: A partial agonist acts as a functional stabilizer,
providing moderate activity while blocking the full agonist.
Citation: Stahl's Essential Psychopharmacology, 5th Ed., Ch. 1.
Question 3
Reference: Ch. 1, Neurotransmitters and Receptors
Question Stem: A nursing student is teaching a patient about
the "fight or flight" response. Which neurotransmitter, released
directly from the adrenal medulla and from sympathetic nerve
endings, is most directly responsible for the systemic effects like
increased heart rate and blood pressure?
Options:
A) Serotonin
B) Dopamine
C) Norepinephrine
D) Acetylcholine
Correct Answer: C
Rationales:
