NR 546 MIDTERM EXAM REVIEW:
PSYCHOPHARMACOLOGY
ESSENTIALS QUESTIONS WITH
CORRECT ANSWERS (LATEST 2026 /
2027), (A+ GUARANTEE).
1. A client is prescribed a medication that acts as a partial agonist at the dopamine D2
receptor. How does this medication function in a state of high dopamine concentration?
A. It acts as a pure antagonist, blocking all dopamine activity.
B. It acts as a net antagonist, lowering dopamine activity.
C. It acts as a net agonist, further increasing dopamine activity.
D. It has no effect on the receptor site when endogenous dopamine is present.
Answer: B
Conceptual Explanation: Partial agonists act as a functional antagonist in the presence of
high neurotransmitter concentration by competing for receptors and providing less signal
than the full agonist.
2. Which cytochrome P450 enzyme is responsible for the metabolism of approximately 25
percent of all psychotropic medications, including many antidepressants and antipsychotics?
A. CYP2D6
,B. CYP2C19
C. CYP1A2
D. CYP3A4
Answer: A
Conceptual Explanation: CYP2D6 is a major metabolic pathway for many psychotropic
drugs. Variations in this enzyme lead to poor, intermediate, or ultra-rapid metabolizer
phenotypes.
3. A patient taking Phenelzine (an MAOI) consumes aged cheese and wine, leading to a
hypertensive crisis. This is caused by the accumulation of which substance?
A. Tyramine
B. Tryptophan
C. Phenylalanine
D. Histamine
Answer: A
Conceptual Explanation: MAOIs inhibit the breakdown of tyramine in the gut. High levels
of tyramine cause the release of stored norepinephrine, leading to dangerous increases in
blood pressure.
4. The ‘Mesolimbic’ pathway is primarily associated with which symptoms in Schizophrenia?
A. Negative symptoms such as apathy
, B. Cognitive symptoms such as memory loss
C. Positive symptoms such as hallucinations
D. Extrapyramidal symptoms
Answer: C
Conceptual Explanation: Overactivity of the mesolimbic dopamine pathway is thought to
mediate the positive symptoms of psychosis, such as delusions and hallucinations.
5. Which brain region is associated with the ‘worry’ loop in anxiety disorders, involving the
cortico-striato-thalamo-cortical (CSTC) circuit?
A. Prefrontal Cortex
B. Hippocampus
C. Amygdala
D. Locus Coeruleus
Answer: A
Conceptual Explanation: The CSTC circuit, involving the prefrontal cortex, is responsible
for the cognitive experience of worry, whereas the amygdala is central to fear.
6. Which neurotransmitter is primarily targeted by benzodiazepines to produce an anxiolytic
effect?
A. GABA
B. Norepinephrine
PSYCHOPHARMACOLOGY
ESSENTIALS QUESTIONS WITH
CORRECT ANSWERS (LATEST 2026 /
2027), (A+ GUARANTEE).
1. A client is prescribed a medication that acts as a partial agonist at the dopamine D2
receptor. How does this medication function in a state of high dopamine concentration?
A. It acts as a pure antagonist, blocking all dopamine activity.
B. It acts as a net antagonist, lowering dopamine activity.
C. It acts as a net agonist, further increasing dopamine activity.
D. It has no effect on the receptor site when endogenous dopamine is present.
Answer: B
Conceptual Explanation: Partial agonists act as a functional antagonist in the presence of
high neurotransmitter concentration by competing for receptors and providing less signal
than the full agonist.
2. Which cytochrome P450 enzyme is responsible for the metabolism of approximately 25
percent of all psychotropic medications, including many antidepressants and antipsychotics?
A. CYP2D6
,B. CYP2C19
C. CYP1A2
D. CYP3A4
Answer: A
Conceptual Explanation: CYP2D6 is a major metabolic pathway for many psychotropic
drugs. Variations in this enzyme lead to poor, intermediate, or ultra-rapid metabolizer
phenotypes.
3. A patient taking Phenelzine (an MAOI) consumes aged cheese and wine, leading to a
hypertensive crisis. This is caused by the accumulation of which substance?
A. Tyramine
B. Tryptophan
C. Phenylalanine
D. Histamine
Answer: A
Conceptual Explanation: MAOIs inhibit the breakdown of tyramine in the gut. High levels
of tyramine cause the release of stored norepinephrine, leading to dangerous increases in
blood pressure.
4. The ‘Mesolimbic’ pathway is primarily associated with which symptoms in Schizophrenia?
A. Negative symptoms such as apathy
, B. Cognitive symptoms such as memory loss
C. Positive symptoms such as hallucinations
D. Extrapyramidal symptoms
Answer: C
Conceptual Explanation: Overactivity of the mesolimbic dopamine pathway is thought to
mediate the positive symptoms of psychosis, such as delusions and hallucinations.
5. Which brain region is associated with the ‘worry’ loop in anxiety disorders, involving the
cortico-striato-thalamo-cortical (CSTC) circuit?
A. Prefrontal Cortex
B. Hippocampus
C. Amygdala
D. Locus Coeruleus
Answer: A
Conceptual Explanation: The CSTC circuit, involving the prefrontal cortex, is responsible
for the cognitive experience of worry, whereas the amygdala is central to fear.
6. Which neurotransmitter is primarily targeted by benzodiazepines to produce an anxiolytic
effect?
A. GABA
B. Norepinephrine
