NSG 552 Psychopharmacology Exam 1 | Latest
Questions and Answers Plus Rationales
Academic Year 2026/27 Instant Pdf Download
SECTION 1: PHARMACOKINETICS & PHARMACODYNAMICS
(Questions 1-12)
QUESTION 1
A nursing student asks the preceptor to explain the primary difference
between pharmacokinetics and pharmacodynamics. Which response is
most accurate?
A) "Pharmacokinetics is the effect of the drug on the body;
pharmacodynamics is what the body does to the drug."
B) "Pharmacokinetics is what the body does to the drug;
pharmacodynamics is the effect of the drug on the body."
C) "Pharmacokinetics involves receptor binding; pharmacodynamics
involves drug absorption."
D) "There is no significant difference between the two terms."
,Answer: B) "Pharmacokinetics is what the body does to the drug;
pharmacodynamics is the effect of the drug on the body."
Rationale: Pharmacokinetics describes what the body does to the
drug (Absorption, Distribution, Metabolism, Excretion - ADME).
Pharmacodynamics describes what the drug does to the body
(receptor binding, mechanism of action, clinical effect) .
QUESTION 2
A patient with depression asks, "My doctor said my medication increases
serotonin. How does that work?" The PMHNP correctly explains that
after a neurotransmitter is released into the synapse, it can be taken back
into the presynaptic neuron through a process known as:
A) Upregulation
B) Depolarization
C) Reuptake
D) Catabolism
Answer: C) Reuptake
Rationale: Reuptake is the process by which neurotransmitters are
transported back into the presynaptic neuron from the synaptic cleft,
terminating their effect. SSRIs block this specific process to increase
synaptic serotonin levels .
,QUESTION 3
A patient with bipolar disorder has been taking a high-dose dopamine
agonist for years. The PMHNP explains that the patient may now require
a higher dose to achieve the same effect due to:
A) Upregulation of dopamine receptors
B) Downregulation of dopamine receptors
C) Increased activity of the CYP450 system
D) Antagonistic effects at the serotonin transporter
Answer: B) Downregulation of dopamine receptors
Rationale: Chronic exposure to an agonist leads to downregulation
(decreased number and sensitivity) of the target receptors. The
neuron adapts to constant stimulation by reducing receptor
availability, requiring higher doses to achieve the same clinical
effect (tolerance) .
QUESTION 4
A patient abruptly stops taking a high-dose antipsychotic (a D2
antagonist). Which receptor adaptation best explains the risk of severe
withdrawal symptoms or "supersensitivity psychosis"?
, A) Downregulation of postsynaptic D2 receptors
B) Upregulation of postsynaptic D2 receptors
C) Inhibition of monoamine oxidase (MAO)
D) Blockade of acetylcholinesterase
Answer: B) Upregulation of postsynaptic D2 receptors
Rationale: Chronic use of an antagonist causes the brain to
compensate by upregulating (increasing the number of) receptors.
When the antagonist is suddenly withdrawn, these excess unblocked
receptors lead to increased sensitivity to endogenous dopamine,
which can cause psychosis or movement disorders .
QUESTION 5
Which statement best describes drug "affinity"?
A) The maximum effect a drug can produce
B) The extent to which a drug binds to receptors at a given concentration
C) The dose required to produce 50% of maximum effect
D) The speed at which a drug is metabolized
Answer: B) The extent to which a drug binds to receptors at a given
concentration
Questions and Answers Plus Rationales
Academic Year 2026/27 Instant Pdf Download
SECTION 1: PHARMACOKINETICS & PHARMACODYNAMICS
(Questions 1-12)
QUESTION 1
A nursing student asks the preceptor to explain the primary difference
between pharmacokinetics and pharmacodynamics. Which response is
most accurate?
A) "Pharmacokinetics is the effect of the drug on the body;
pharmacodynamics is what the body does to the drug."
B) "Pharmacokinetics is what the body does to the drug;
pharmacodynamics is the effect of the drug on the body."
C) "Pharmacokinetics involves receptor binding; pharmacodynamics
involves drug absorption."
D) "There is no significant difference between the two terms."
,Answer: B) "Pharmacokinetics is what the body does to the drug;
pharmacodynamics is the effect of the drug on the body."
Rationale: Pharmacokinetics describes what the body does to the
drug (Absorption, Distribution, Metabolism, Excretion - ADME).
Pharmacodynamics describes what the drug does to the body
(receptor binding, mechanism of action, clinical effect) .
QUESTION 2
A patient with depression asks, "My doctor said my medication increases
serotonin. How does that work?" The PMHNP correctly explains that
after a neurotransmitter is released into the synapse, it can be taken back
into the presynaptic neuron through a process known as:
A) Upregulation
B) Depolarization
C) Reuptake
D) Catabolism
Answer: C) Reuptake
Rationale: Reuptake is the process by which neurotransmitters are
transported back into the presynaptic neuron from the synaptic cleft,
terminating their effect. SSRIs block this specific process to increase
synaptic serotonin levels .
,QUESTION 3
A patient with bipolar disorder has been taking a high-dose dopamine
agonist for years. The PMHNP explains that the patient may now require
a higher dose to achieve the same effect due to:
A) Upregulation of dopamine receptors
B) Downregulation of dopamine receptors
C) Increased activity of the CYP450 system
D) Antagonistic effects at the serotonin transporter
Answer: B) Downregulation of dopamine receptors
Rationale: Chronic exposure to an agonist leads to downregulation
(decreased number and sensitivity) of the target receptors. The
neuron adapts to constant stimulation by reducing receptor
availability, requiring higher doses to achieve the same clinical
effect (tolerance) .
QUESTION 4
A patient abruptly stops taking a high-dose antipsychotic (a D2
antagonist). Which receptor adaptation best explains the risk of severe
withdrawal symptoms or "supersensitivity psychosis"?
, A) Downregulation of postsynaptic D2 receptors
B) Upregulation of postsynaptic D2 receptors
C) Inhibition of monoamine oxidase (MAO)
D) Blockade of acetylcholinesterase
Answer: B) Upregulation of postsynaptic D2 receptors
Rationale: Chronic use of an antagonist causes the brain to
compensate by upregulating (increasing the number of) receptors.
When the antagonist is suddenly withdrawn, these excess unblocked
receptors lead to increased sensitivity to endogenous dopamine,
which can cause psychosis or movement disorders .
QUESTION 5
Which statement best describes drug "affinity"?
A) The maximum effect a drug can produce
B) The extent to which a drug binds to receptors at a given concentration
C) The dose required to produce 50% of maximum effect
D) The speed at which a drug is metabolized
Answer: B) The extent to which a drug binds to receptors at a given
concentration
