NSG 552 Psychopharmacology Exam 1 2 3
ACTUAL EXAM 2026/2027 |
Psychopharmacology Complete Series | Verified
Q&A | Pass Guaranteed - A+ Graded
Section 1: Neurotransmitter Systems (Questions 1–5)
Q1: A PMHNP is explaining the pathophysiology of Major Depressive Disorder (MDD) to a resident.
Which statement best describes the "Monoamine Hypothesis" of depression?
A. A deficiency of gamma-aminobutyric acid (GABA) leads to inhibitory excess and low mood.
B. Reduced synaptic availability of norepinephrine, serotonin, and/or dopamine underlies depressive
symptoms. [CORRECT]
C. Excessive glutamatergic activity causes excitotoxicity in the hippocampus.
D. Sensitization of postsynaptic receptors due to excessive serotonin binding.
Correct Answer: B
Rationale: The Monoamine Hypothesis posits that a functional deficit of monoamine
neurotransmitters—serotonin (5-HT), norepinephrine (NE), and/or dopamine (DA)—in the synaptic cleft
is the primary driver of depressive symptoms. This theory is supported by the efficacy of drugs that
increase synaptic monoamine availability (e.g., SSRIs, SNRIs). Option A is incorrect; GABA deficiency is
more linked to anxiety/seizures. Option C describes a glutamate-based theory (e.g., NMDA antagonism),
which is a newer hypothesis but not the classic monoamine theory. Option D describes receptor
downregulation/desensitization which occurs with chronic treatment, not the acute pathophysiology of
the disorder itself.
Q2: A patient presents with agitation, tachycardia, and hyperthermia after overdosing on a medication
that increases norepinephrine (NE) release. Which presynaptic receptor, when activated, would
theoretically decrease further NE release?
A. Alpha-1 adrenergic receptor.
,B. Beta-1 adrenergic receptor.
C. Alpha-2 adrenergic receptor. [CORRECT]
D. Nicotinic acetylcholine receptor.
Correct Answer: C
Rationale: The Alpha-2 adrenergic receptor functions as an autoreceptor on the presynaptic terminal of
noradrenergic neurons. When stimulated by NE, it provides negative feedback, inhibiting further release
of NE (acting as a "brake"). Clonidine and guanfacine are alpha-2 agonists that reduce sympathetic
outflow. Alpha-1 (A) and Beta-1 (B) are postsynaptic receptors that mediate end-organ effects
(vasoconstriction, heart rate). Stimulating them would worsen the patient's symptoms.
Q3: Which of the following statements regarding the metabolism of serotonin is accurate?
A. It is primarily metabolized by Catechol-O-Methyltransferase (COMT).
B. It is degraded by Monoamine Oxidase A (MAO-A) into 5-Hydroxyindoleacetic acid (5-HIAA).
[CORRECT]
C. It is synthesized directly from L-DOPA.
D. It is reuptaken primarily via the norepinephrine transporter (NET).
Correct Answer: B
Rationale: Serotonin is metabolized primarily by MAO-A into the inactive metabolite 5-HIAA, which is
excreted in urine. This is why MAOIs inhibit this breakdown, increasing synaptic serotonin. Option A is
incorrect; COMT primarily metabolizes catecholamines (NE, DA, Epi). Option C is incorrect; Serotonin is
synthesized from Tryptophan via Tryptophan Hydroxylase, whereas L-DOPA is the precursor for
Dopamine. Option D is incorrect; Serotonin is reuptaken by the Serotonin Transporter (SERT).
Q4: A patient with schizophrenia shows marked "negative symptoms" (flat affect, avolition). Dysfunction
in which dopaminergic pathway is most associated with these symptoms?
A. Mesolimbic pathway.
B. Nigrostriatal pathway.
,C. Mesocortical pathway. [CORRECT]
D. Tuberoinfundibular pathway.
Correct Answer: C
Rationale: The Mesocortical pathway projects from the ventral tegmental area (VTA) to the prefrontal
cortex. Hypoactivity of dopamine in this area is associated with negative symptoms and cognitive
impairment in schizophrenia. The Mesolimbic pathway (A) is associated with positive symptoms
(hyperactivity). The Nigrostriatal pathway (B) is involved in motor control (EPS with blockade). The
Tuberoinfundibular pathway (D) regulates prolactin (hyperprolactinemia with blockade).
Q5: GABA is the primary inhibitory neurotransmitter in the CNS. Which ion channel is directly linked to
the GABA-A receptor?
A. Sodium (Na+).
B. Calcium (Ca2+).
C. Chloride (Cl-). [CORRECT]
D. Potassium (K+).
Correct Answer: C
Rationale: The GABA-A receptor is a ligand-gated ion channel that, when activated by GABA (or
benzodiazepines/barbiturates), opens to allow Chloride (Cl-) ions to enter the neuron. This influx of
negative ions hyperpolarizes the cell membrane, making it less likely to fire (inhibitory effect). Sodium
(A) and Calcium (B) are excitatory ions. Potassium (D) efflux causes hyperpolarization but GABA-A is
specifically a chloride channel.
Section 2: Pharmacokinetics & Pharmacodynamics (Questions 6–15)
Q6: A PMHNP is prescribing a drug with a high first-pass effect. Which route of administration would
result in the highest bioavailability?
A. Oral (PO).
B. Intramuscular (IM).
, C. Sublingual (SL). [CORRECT]
D. Rectal (PR).
Correct Answer: C
Rationale: The first-pass effect refers to the metabolism of a drug by the liver before it reaches systemic
circulation. Drugs absorbed through the oral mucosa (Sublingual) or administered intravenously bypass
the portal circulation and the liver's initial metabolism. While IV provides 100% bioavailability, it is not
listed. Among the options, Sublingual bypasses the first-pass effect to the greatest extent compared to
Oral (A) which has the highest first-pass metabolism. Rectal (D) partially bypasses the liver (~50%), but
Sublingual is superior for avoiding it.
Q7: Calculation Question A patient is prescribed a medication with a half-life of 24 hours. How long will
it take for the medication to reach approximately 94% (steady state) of its final concentration in the
plasma, assuming no loading dose?
A. 24 hours.
B. 48 hours.
C. 72 hours.
D. 96 hours. [CORRECT]
Correct Answer: D
Rationale: It takes approximately 4 to 5 half-lives for a drug to reach steady state. With a half-life of 24
hours:
1 half-life (50%) = 24 hrs
2 half-lives (75%) = 48 hrs
3 half-lives (87.5%) = 72 hrs
4 half-lives (93.75%) = 96 hrs.
Therefore, 96 hours is the correct answer.
ACTUAL EXAM 2026/2027 |
Psychopharmacology Complete Series | Verified
Q&A | Pass Guaranteed - A+ Graded
Section 1: Neurotransmitter Systems (Questions 1–5)
Q1: A PMHNP is explaining the pathophysiology of Major Depressive Disorder (MDD) to a resident.
Which statement best describes the "Monoamine Hypothesis" of depression?
A. A deficiency of gamma-aminobutyric acid (GABA) leads to inhibitory excess and low mood.
B. Reduced synaptic availability of norepinephrine, serotonin, and/or dopamine underlies depressive
symptoms. [CORRECT]
C. Excessive glutamatergic activity causes excitotoxicity in the hippocampus.
D. Sensitization of postsynaptic receptors due to excessive serotonin binding.
Correct Answer: B
Rationale: The Monoamine Hypothesis posits that a functional deficit of monoamine
neurotransmitters—serotonin (5-HT), norepinephrine (NE), and/or dopamine (DA)—in the synaptic cleft
is the primary driver of depressive symptoms. This theory is supported by the efficacy of drugs that
increase synaptic monoamine availability (e.g., SSRIs, SNRIs). Option A is incorrect; GABA deficiency is
more linked to anxiety/seizures. Option C describes a glutamate-based theory (e.g., NMDA antagonism),
which is a newer hypothesis but not the classic monoamine theory. Option D describes receptor
downregulation/desensitization which occurs with chronic treatment, not the acute pathophysiology of
the disorder itself.
Q2: A patient presents with agitation, tachycardia, and hyperthermia after overdosing on a medication
that increases norepinephrine (NE) release. Which presynaptic receptor, when activated, would
theoretically decrease further NE release?
A. Alpha-1 adrenergic receptor.
,B. Beta-1 adrenergic receptor.
C. Alpha-2 adrenergic receptor. [CORRECT]
D. Nicotinic acetylcholine receptor.
Correct Answer: C
Rationale: The Alpha-2 adrenergic receptor functions as an autoreceptor on the presynaptic terminal of
noradrenergic neurons. When stimulated by NE, it provides negative feedback, inhibiting further release
of NE (acting as a "brake"). Clonidine and guanfacine are alpha-2 agonists that reduce sympathetic
outflow. Alpha-1 (A) and Beta-1 (B) are postsynaptic receptors that mediate end-organ effects
(vasoconstriction, heart rate). Stimulating them would worsen the patient's symptoms.
Q3: Which of the following statements regarding the metabolism of serotonin is accurate?
A. It is primarily metabolized by Catechol-O-Methyltransferase (COMT).
B. It is degraded by Monoamine Oxidase A (MAO-A) into 5-Hydroxyindoleacetic acid (5-HIAA).
[CORRECT]
C. It is synthesized directly from L-DOPA.
D. It is reuptaken primarily via the norepinephrine transporter (NET).
Correct Answer: B
Rationale: Serotonin is metabolized primarily by MAO-A into the inactive metabolite 5-HIAA, which is
excreted in urine. This is why MAOIs inhibit this breakdown, increasing synaptic serotonin. Option A is
incorrect; COMT primarily metabolizes catecholamines (NE, DA, Epi). Option C is incorrect; Serotonin is
synthesized from Tryptophan via Tryptophan Hydroxylase, whereas L-DOPA is the precursor for
Dopamine. Option D is incorrect; Serotonin is reuptaken by the Serotonin Transporter (SERT).
Q4: A patient with schizophrenia shows marked "negative symptoms" (flat affect, avolition). Dysfunction
in which dopaminergic pathway is most associated with these symptoms?
A. Mesolimbic pathway.
B. Nigrostriatal pathway.
,C. Mesocortical pathway. [CORRECT]
D. Tuberoinfundibular pathway.
Correct Answer: C
Rationale: The Mesocortical pathway projects from the ventral tegmental area (VTA) to the prefrontal
cortex. Hypoactivity of dopamine in this area is associated with negative symptoms and cognitive
impairment in schizophrenia. The Mesolimbic pathway (A) is associated with positive symptoms
(hyperactivity). The Nigrostriatal pathway (B) is involved in motor control (EPS with blockade). The
Tuberoinfundibular pathway (D) regulates prolactin (hyperprolactinemia with blockade).
Q5: GABA is the primary inhibitory neurotransmitter in the CNS. Which ion channel is directly linked to
the GABA-A receptor?
A. Sodium (Na+).
B. Calcium (Ca2+).
C. Chloride (Cl-). [CORRECT]
D. Potassium (K+).
Correct Answer: C
Rationale: The GABA-A receptor is a ligand-gated ion channel that, when activated by GABA (or
benzodiazepines/barbiturates), opens to allow Chloride (Cl-) ions to enter the neuron. This influx of
negative ions hyperpolarizes the cell membrane, making it less likely to fire (inhibitory effect). Sodium
(A) and Calcium (B) are excitatory ions. Potassium (D) efflux causes hyperpolarization but GABA-A is
specifically a chloride channel.
Section 2: Pharmacokinetics & Pharmacodynamics (Questions 6–15)
Q6: A PMHNP is prescribing a drug with a high first-pass effect. Which route of administration would
result in the highest bioavailability?
A. Oral (PO).
B. Intramuscular (IM).
, C. Sublingual (SL). [CORRECT]
D. Rectal (PR).
Correct Answer: C
Rationale: The first-pass effect refers to the metabolism of a drug by the liver before it reaches systemic
circulation. Drugs absorbed through the oral mucosa (Sublingual) or administered intravenously bypass
the portal circulation and the liver's initial metabolism. While IV provides 100% bioavailability, it is not
listed. Among the options, Sublingual bypasses the first-pass effect to the greatest extent compared to
Oral (A) which has the highest first-pass metabolism. Rectal (D) partially bypasses the liver (~50%), but
Sublingual is superior for avoiding it.
Q7: Calculation Question A patient is prescribed a medication with a half-life of 24 hours. How long will
it take for the medication to reach approximately 94% (steady state) of its final concentration in the
plasma, assuming no loading dose?
A. 24 hours.
B. 48 hours.
C. 72 hours.
D. 96 hours. [CORRECT]
Correct Answer: D
Rationale: It takes approximately 4 to 5 half-lives for a drug to reach steady state. With a half-life of 24
hours:
1 half-life (50%) = 24 hrs
2 half-lives (75%) = 48 hrs
3 half-lives (87.5%) = 72 hrs
4 half-lives (93.75%) = 96 hrs.
Therefore, 96 hours is the correct answer.
