WGU D345 NURS 6438 Psychopharmacology Comprehensive
Final OA ACTUAL EXAM 2026 Questions and Correct Verified
Answers (GRADED A+)
Question 1:
Which neurotransmitter is primarily synthesized in the locus coeruleus
and is involved in the fight-or-flight response, attention, and arousal?
A) Dopamine
B) Serotonin
C) Acetylcholine
D) Norepinephrine
VERIFIED ANSWER: D) Norepinephrine
Rationale: Norepinephrine is synthesized in the locus coeruleus and plays
a critical role in the sympathetic nervous system, regulating attention,
arousal, and the stress response.
Question 2:
A medication that binds to a receptor and produces a full biological
response is known as which of the following?
A) Antagonist
B) Inverse agonist
,C) Partial agonist
D) Full agonist
VERIFIED ANSWER: D) Full agonist
Rationale: A full agonist binds to a receptor and produces the maximal
biological response that the receptor is capable of producing.
Question 3:
The process by which a drug is transported from the site of
administration to the bloodstream is called:
A) Distribution
B) Metabolism
C) Absorption
D) Excretion
VERIFIED ANSWER: C) Absorption
Rationale: Absorption is the first phase of pharmacokinetics, involving the
movement of a drug from its administration site (e.g., gastrointestinal
tract) into the bloodstream.
Question 4:
Which cytochrome P450 enzyme is responsible for metabolizing the
majority of SSRIs and many antipsychotics, making it a common source of
drug-drug interactions?
,A) CYP1A2
B) CYP2C9
C) CYP2D6
D) CYP3A4
VERIFIED ANSWER: C) CYP2D6
Rationale: CYP2D6 metabolizes many psychotropic medications including
fluoxetine, paroxetine, and several antipsychotics. Genetic polymorphisms
can lead to poor or ultrarapid metabolism, affecting drug levels and
safety.
Question 5:
The term "pharmacodynamics" refers to which of the following?
A) What the body does to the drug
B) What the drug does to the body
C) The study of drug absorption rates
D) The process of drug excretion
VERIFIED ANSWER: B) What the drug does to the body
Rationale: Pharmacodynamics describes the effects of a drug on the
body, including receptor binding, mechanism of action, and the
relationship between drug concentration and therapeutic response.
, Question 6:
A substance that binds to a receptor and blocks the action of an agonist is
called a(n):
A) Partial agonist
B) Inverse agonist
C) Antagonist
D) Neuromodulator
VERIFIED ANSWER: C) Antagonist
Rationale: An antagonist binds to a receptor without activating it and
prevents the receptor from being activated by agonists, effectively
blocking the receptor's function.
Question 7:
Which neurotransmitter is synthesized from tryptophan and plays a key
role in mood regulation, sleep, and appetite?
A) Dopamine
B) Norepinephrine
C) Serotonin
D) GABA
VERIFIED ANSWER: C) Serotonin
Final OA ACTUAL EXAM 2026 Questions and Correct Verified
Answers (GRADED A+)
Question 1:
Which neurotransmitter is primarily synthesized in the locus coeruleus
and is involved in the fight-or-flight response, attention, and arousal?
A) Dopamine
B) Serotonin
C) Acetylcholine
D) Norepinephrine
VERIFIED ANSWER: D) Norepinephrine
Rationale: Norepinephrine is synthesized in the locus coeruleus and plays
a critical role in the sympathetic nervous system, regulating attention,
arousal, and the stress response.
Question 2:
A medication that binds to a receptor and produces a full biological
response is known as which of the following?
A) Antagonist
B) Inverse agonist
,C) Partial agonist
D) Full agonist
VERIFIED ANSWER: D) Full agonist
Rationale: A full agonist binds to a receptor and produces the maximal
biological response that the receptor is capable of producing.
Question 3:
The process by which a drug is transported from the site of
administration to the bloodstream is called:
A) Distribution
B) Metabolism
C) Absorption
D) Excretion
VERIFIED ANSWER: C) Absorption
Rationale: Absorption is the first phase of pharmacokinetics, involving the
movement of a drug from its administration site (e.g., gastrointestinal
tract) into the bloodstream.
Question 4:
Which cytochrome P450 enzyme is responsible for metabolizing the
majority of SSRIs and many antipsychotics, making it a common source of
drug-drug interactions?
,A) CYP1A2
B) CYP2C9
C) CYP2D6
D) CYP3A4
VERIFIED ANSWER: C) CYP2D6
Rationale: CYP2D6 metabolizes many psychotropic medications including
fluoxetine, paroxetine, and several antipsychotics. Genetic polymorphisms
can lead to poor or ultrarapid metabolism, affecting drug levels and
safety.
Question 5:
The term "pharmacodynamics" refers to which of the following?
A) What the body does to the drug
B) What the drug does to the body
C) The study of drug absorption rates
D) The process of drug excretion
VERIFIED ANSWER: B) What the drug does to the body
Rationale: Pharmacodynamics describes the effects of a drug on the
body, including receptor binding, mechanism of action, and the
relationship between drug concentration and therapeutic response.
, Question 6:
A substance that binds to a receptor and blocks the action of an agonist is
called a(n):
A) Partial agonist
B) Inverse agonist
C) Antagonist
D) Neuromodulator
VERIFIED ANSWER: C) Antagonist
Rationale: An antagonist binds to a receptor without activating it and
prevents the receptor from being activated by agonists, effectively
blocking the receptor's function.
Question 7:
Which neurotransmitter is synthesized from tryptophan and plays a key
role in mood regulation, sleep, and appetite?
A) Dopamine
B) Norepinephrine
C) Serotonin
D) GABA
VERIFIED ANSWER: C) Serotonin
