NSG 552 EXAM 1 – WILKES
PSYCHOPHARMACOLOGY (2026)
COMPREHENSIVE PRACTICE
QUESTIONS AND ANSWERS
1. Which phase of pharmacokinetics is most directly affected by the liver’s Cytochrome P450
(CYP450) enzyme system?
A. Absorption
B. Distribution
C. Excretion
D. Metabolism
Answer: D
Conceptual Explanation: Metabolism, primarily occurring in the liver, involves the
chemical alteration of a drug. The CYP450 system is the major enzyme family responsible
for the biotransformation of psychotropic medications.
,2. In the context of receptor theory, how does a ‘partial agonist’ function compared to a ‘full
agonist’?
A. It binds to the receptor but produces no biological response.
B. It blocks the receptor completely, preventing any ligand binding.
C. It activates the receptor to a submaximal level regardless of the concentration.
D. It produces a response opposite to that of the natural ligand.
Answer: C
Conceptual Explanation: A partial agonist binds to a receptor but elicits only a partial
physiological response compared to a full agonist, acting as a functional antagonist in the
presence of high levels of a full agonist.
3. Which dopamine pathway is primarily responsible for the ‘positive’ symptoms of
schizophrenia, such as hallucinations and delusions?
A. Mesolimbic pathway
B. Nigrostriatal pathway
C. Tuberoinfundibular pathway
D. Mesocortical pathway
Answer: A
, Conceptual Explanation: Overactivity in the mesolimbic dopamine pathway is associated
with positive symptoms of schizophrenia, whereas the mesocortical pathway is linked to
negative symptoms.
4. A patient is prescribed an SSRI and subsequently develops tachycardia, diaphoresis,
hyperreflexia, and clonus. What is the most likely diagnosis?
A. Neuroleptic Malignant Syndrome
B. Serotonin Syndrome
C. Anticholinergic Crisis
D. Tardive Dyskinesia
Answer: B
Conceptual Explanation: Serotonin syndrome is characterized by the triad of mental
status changes, autonomic hyperactivity, and neuromuscular abnormalities (like clonus
and hyperreflexia).
5. Steady-state concentration of a drug is typically achieved after how many half-lives?
A. 4 to 5 half-lives
B. 2 to 3 half-lives
C. 1 to 2 half-lives
D. 8 to 10 half-lives
Answer: A
PSYCHOPHARMACOLOGY (2026)
COMPREHENSIVE PRACTICE
QUESTIONS AND ANSWERS
1. Which phase of pharmacokinetics is most directly affected by the liver’s Cytochrome P450
(CYP450) enzyme system?
A. Absorption
B. Distribution
C. Excretion
D. Metabolism
Answer: D
Conceptual Explanation: Metabolism, primarily occurring in the liver, involves the
chemical alteration of a drug. The CYP450 system is the major enzyme family responsible
for the biotransformation of psychotropic medications.
,2. In the context of receptor theory, how does a ‘partial agonist’ function compared to a ‘full
agonist’?
A. It binds to the receptor but produces no biological response.
B. It blocks the receptor completely, preventing any ligand binding.
C. It activates the receptor to a submaximal level regardless of the concentration.
D. It produces a response opposite to that of the natural ligand.
Answer: C
Conceptual Explanation: A partial agonist binds to a receptor but elicits only a partial
physiological response compared to a full agonist, acting as a functional antagonist in the
presence of high levels of a full agonist.
3. Which dopamine pathway is primarily responsible for the ‘positive’ symptoms of
schizophrenia, such as hallucinations and delusions?
A. Mesolimbic pathway
B. Nigrostriatal pathway
C. Tuberoinfundibular pathway
D. Mesocortical pathway
Answer: A
, Conceptual Explanation: Overactivity in the mesolimbic dopamine pathway is associated
with positive symptoms of schizophrenia, whereas the mesocortical pathway is linked to
negative symptoms.
4. A patient is prescribed an SSRI and subsequently develops tachycardia, diaphoresis,
hyperreflexia, and clonus. What is the most likely diagnosis?
A. Neuroleptic Malignant Syndrome
B. Serotonin Syndrome
C. Anticholinergic Crisis
D. Tardive Dyskinesia
Answer: B
Conceptual Explanation: Serotonin syndrome is characterized by the triad of mental
status changes, autonomic hyperactivity, and neuromuscular abnormalities (like clonus
and hyperreflexia).
5. Steady-state concentration of a drug is typically achieved after how many half-lives?
A. 4 to 5 half-lives
B. 2 to 3 half-lives
C. 1 to 2 half-lives
D. 8 to 10 half-lives
Answer: A
