ANCC Psychiatric–Mental Health Nurse Practitioner Board Certification Final Examination 2026:
Challenging Clinical Scenarios, Rare Adverse Effects, Complex Differential Diagnoses, and Advanced
Psychopharmacologic Decision-Making
Questions 1–150 (Multiple Answers + Detailed Explanations)
Section 1: Complex Neurobiology & Pharmacogenomics (Q1–20)
Q1. Which of the following statements about the role of the kynurenine pathway in major depression
are correct? (Select all that apply)
A) Pro-inflammatory cytokines activate indoleamine 2,3-dioxygenase (IDO)
B) IDO shifts tryptophan metabolism away from serotonin toward kynurenine
C) Kynurenic acid (KYNA) is an NMDA receptor antagonist
D) Quinolinic acid (QUIN) is an NMDA receptor agonist and neurotoxic
E) Increased QUIN/KYNA ratio is associated with depressive symptoms
Answer: A, B, C, D, E
Explanation: All statements are correct. Inflammation drives IDO, reducing serotonin and increasing
kynurenine. KYNA is neuroprotective (NMDA antagonist); QUIN is neurotoxic (NMDA agonist).
Elevated QUIN/KYNA ratio is found in depression and suicidal behavior.
Q2. Which of the following are correct regarding the gut-brain axis in psychiatric disorders? (Select all
that apply)
A) Gut microbiota produce neurotransmitters including GABA, serotonin, and dopamine
B) Probiotics (psychobiotics) may reduce anxiety and depression symptoms
C) Increased intestinal permeability ("leaky gut") is associated with depression
D) Fecal microbiota transplantation has no role in psychiatry
E) The vagus nerve is a major communication pathway between gut and brain
Answer: A, B, C, E
Explanation: FMT is being studied for psychiatric disorders (e.g., IBS with anxiety, autism) but is not yet
standard. All other statements are supported by emerging evidence.
Q3. Which of the following are correct about the role of brain-derived neurotrophic factor (BDNF) and
its receptor TrkB in antidepressant response? (Select all that apply)
A) Chronic stress reduces BDNF expression in the hippocampus
B) Antidepressants increase BDNF signaling via TrkB activation
C) Ketamine's rapid antidepressant effect involves TrkB activation independent of NMDA blockade
, D) The Val66Met polymorphism (rs6265) reduces activity-dependent BDNF secretion
E) Met allele carriers have worse response to SSRIs
Answer: A, B, C, D, E
Explanation: All are correct. The Val66Met polymorphism (Met allele) impairs BDNF trafficking and
secretion, associated with smaller hippocampal volume and poorer antidepressant response.
Q4. Which of the following statements about the cholinergic anti-inflammatory pathway are
correct? (Select all that apply)
A) Vagus nerve stimulation (VNS) activates the splenic nerve
B) Acetylcholine binding to α7 nicotinic receptors on macrophages reduces TNF-α
C) VNS is FDA-approved for treatment-resistant depression
D) The cholinergic pathway has no role in rheumatoid arthritis
E) Nicotinic agonists are being studied for inflammatory depression
Answer: A, B, C, E
Explanation: The cholinergic anti-inflammatory pathway is active in rheumatoid arthritis; VNS is used
for RA. VNS is FDA-approved for TRD and epilepsy.
Q5. Which of the following are correct regarding the role of the endocannabinoid system in anxiety
and PTSD? (Select all that apply)
A) Anandamide (AEA) is an endocannabinoid with anxiolytic properties
B) 2-Arachidonoylglycerol (2-AG) is the most abundant endocannabinoid
C) Fatty acid amide hydrolase (FAAH) breaks down anandamide
D) FAAH inhibitors are being studied as novel anxiolytics
E) Cannabis use worsens PTSD symptoms in the long term
Answer: A, B, C, D, E
Explanation: All are correct. Acute THC may reduce symptoms but chronic use worsens outcomes,
increases relapse, and impairs fear extinction.
Q6. Which of the following are correct about the role of the orexin (hypocretin) system? (Select all that
apply)
A) Orexin neurons are located in the lateral hypothalamus
B) Orexin promotes wakefulness and arousal
C) Orexin deficiency causes narcolepsy type 1
D) Orexin antagonists (suvorexant, daridorexant) are FDA-approved for insomnia
E) Orexin hyperactivation is implicated in panic disorder
Answer: A, B, C, D, E
Explanation: All are correct. Orexin antagonists are used for insomnia; orexin hyperactivity is found in
panic and some anxiety disorders.
,Q7. Which of the following are correct regarding the role of the immune system in
schizophrenia? (Select all that apply)
A) Maternal immune activation during pregnancy increases schizophrenia risk
B) Elevated interleukin-6 (IL-6) is found in first-episode psychosis
C) Microglial activation is seen on PET imaging in schizophrenia
D) Anti-inflammatory agents (celecoxib) may augment antipsychotic response
E) C-reactive protein (CRP) levels predict treatment resistance
Answer: A, B, C, D, E
Explanation: All are correct. Meta-analyses show anti-inflammatory augmentation improves
symptoms, particularly in early psychosis.
Q8. Which of the following are correct regarding the genetics of antipsychotic response? (Select all
that apply)
A) DRD2 Taq1A (rs1800497) is associated with antipsychotic response
B) HTR2C (rs3813929) is associated with antipsychotic-induced weight gain
C) ANKK1 is in linkage disequilibrium with DRD2
D) COMT Val158Met affects prefrontal dopamine and cognitive response
E) CYP2D6 poor metabolizers have higher antipsychotic levels and EPS risk
Answer: A, B, C, D, E
Explanation: All are correct. Pharmacogenomic testing may guide dosing and side effect prediction.
Q9. Which of the following are correct about the role of the circadian rhythm system in bipolar
disorder? (Select all that apply)
A) Clock gene polymorphisms (CLOCK, ARNTL, PER3) are associated with bipolar disorder
B) Lithium alters circadian rhythms via GSK3β inhibition
C) Light therapy may be effective for bipolar depression
D) Melatonin levels are typically elevated in acute mania
E) Social rhythm disruption can trigger manic episodes
Answer: A, B, C, E
Explanation: Melatonin levels are reduced, not elevated, in mania. Social rhythm therapy is an
evidence-based intervention for bipolar disorder.
Q10. Which of the following are correct about the role of the mineralocorticoid receptor (MR) in
depression? (Select all that apply)
A) MR is activated by aldosterone and cortisol
B) MR has higher affinity for cortisol than glucocorticoid receptor (GR)
C) MR dysfunction is implicated in cognitive impairment in depression
, D) MR antagonists (spironolactone, eplerenone) are antidepressant in animal models
E) Fludrocortisone (MR agonist) has shown antidepressant effects in some studies
Answer: A, B, C, D, E
Explanation: Both MR agonists and antagonists have shown antidepressant effects depending on the
phase and chronicity of stress — a complex area.
Q11. Which of the following are correct about the role of oxidative stress in psychiatric
disorders? (Select all that apply)
A) Elevated lipid peroxidation markers (malondialdehyde) are found in schizophrenia
B) N-acetylcysteine (NAC) has antioxidant and glutamatergic effects
C) NAC is FDA-approved for treatment-resistant schizophrenia
D) NAC reduces negative symptoms and craving in substance use disorders
E) Glutathione levels are reduced in the prefrontal cortex of schizophrenia patients
Answer: A, B, D, E
Explanation: NAC is not FDA-approved for schizophrenia but is used off-label with evidence. It is FDA-
approved for acetaminophen overdose and cystic fibrosis.
Q12. Which of the following are correct about the role of the mTOR pathway in synaptic plasticity and
antidepressant response? (Select all that apply)
A) Ketamine rapidly activates mTORC1 in the prefrontal cortex
B) mTOR activation leads to increased dendritic spine density
C) Rapamycin (mTOR inhibitor) blocks ketamine's antidepressant effects in animal models
D) SSRIs also activate mTOR but with slower kinetics
E) Rapamycin has antidepressant effects in some models
Answer: A, B, C, D, E
Explanation: Complex bidirectional effects. Chronic SSRI increases mTOR; acute ketamine does.
Rapamycin blocks ketamine but may have its own effects under chronic stress.
Q13. Which of the following are correct regarding the role of sigma-1 receptors in
neuropsychiatry? (Select all that apply)
A) Sigma-1 receptors are located on the endoplasmic reticulum
B) Fluvoxamine is a high-affinity sigma-1 agonist
C) Sigma-1 agonists have neuroprotective and antidepressant effects
D) Donepezil is a sigma-1 agonist
E) Sigma-1 antagonists may have antipsychotic effects
Answer: A, B, C, D, E
Explanation: Fluvoxamine, donepezil, and some antipsychotics (e.g., fluvoxamine, donepezil) are
sigma-1 agonists. SPD-1 (sigma-1 antagonist) is being studied for psychosis.
Challenging Clinical Scenarios, Rare Adverse Effects, Complex Differential Diagnoses, and Advanced
Psychopharmacologic Decision-Making
Questions 1–150 (Multiple Answers + Detailed Explanations)
Section 1: Complex Neurobiology & Pharmacogenomics (Q1–20)
Q1. Which of the following statements about the role of the kynurenine pathway in major depression
are correct? (Select all that apply)
A) Pro-inflammatory cytokines activate indoleamine 2,3-dioxygenase (IDO)
B) IDO shifts tryptophan metabolism away from serotonin toward kynurenine
C) Kynurenic acid (KYNA) is an NMDA receptor antagonist
D) Quinolinic acid (QUIN) is an NMDA receptor agonist and neurotoxic
E) Increased QUIN/KYNA ratio is associated with depressive symptoms
Answer: A, B, C, D, E
Explanation: All statements are correct. Inflammation drives IDO, reducing serotonin and increasing
kynurenine. KYNA is neuroprotective (NMDA antagonist); QUIN is neurotoxic (NMDA agonist).
Elevated QUIN/KYNA ratio is found in depression and suicidal behavior.
Q2. Which of the following are correct regarding the gut-brain axis in psychiatric disorders? (Select all
that apply)
A) Gut microbiota produce neurotransmitters including GABA, serotonin, and dopamine
B) Probiotics (psychobiotics) may reduce anxiety and depression symptoms
C) Increased intestinal permeability ("leaky gut") is associated with depression
D) Fecal microbiota transplantation has no role in psychiatry
E) The vagus nerve is a major communication pathway between gut and brain
Answer: A, B, C, E
Explanation: FMT is being studied for psychiatric disorders (e.g., IBS with anxiety, autism) but is not yet
standard. All other statements are supported by emerging evidence.
Q3. Which of the following are correct about the role of brain-derived neurotrophic factor (BDNF) and
its receptor TrkB in antidepressant response? (Select all that apply)
A) Chronic stress reduces BDNF expression in the hippocampus
B) Antidepressants increase BDNF signaling via TrkB activation
C) Ketamine's rapid antidepressant effect involves TrkB activation independent of NMDA blockade
, D) The Val66Met polymorphism (rs6265) reduces activity-dependent BDNF secretion
E) Met allele carriers have worse response to SSRIs
Answer: A, B, C, D, E
Explanation: All are correct. The Val66Met polymorphism (Met allele) impairs BDNF trafficking and
secretion, associated with smaller hippocampal volume and poorer antidepressant response.
Q4. Which of the following statements about the cholinergic anti-inflammatory pathway are
correct? (Select all that apply)
A) Vagus nerve stimulation (VNS) activates the splenic nerve
B) Acetylcholine binding to α7 nicotinic receptors on macrophages reduces TNF-α
C) VNS is FDA-approved for treatment-resistant depression
D) The cholinergic pathway has no role in rheumatoid arthritis
E) Nicotinic agonists are being studied for inflammatory depression
Answer: A, B, C, E
Explanation: The cholinergic anti-inflammatory pathway is active in rheumatoid arthritis; VNS is used
for RA. VNS is FDA-approved for TRD and epilepsy.
Q5. Which of the following are correct regarding the role of the endocannabinoid system in anxiety
and PTSD? (Select all that apply)
A) Anandamide (AEA) is an endocannabinoid with anxiolytic properties
B) 2-Arachidonoylglycerol (2-AG) is the most abundant endocannabinoid
C) Fatty acid amide hydrolase (FAAH) breaks down anandamide
D) FAAH inhibitors are being studied as novel anxiolytics
E) Cannabis use worsens PTSD symptoms in the long term
Answer: A, B, C, D, E
Explanation: All are correct. Acute THC may reduce symptoms but chronic use worsens outcomes,
increases relapse, and impairs fear extinction.
Q6. Which of the following are correct about the role of the orexin (hypocretin) system? (Select all that
apply)
A) Orexin neurons are located in the lateral hypothalamus
B) Orexin promotes wakefulness and arousal
C) Orexin deficiency causes narcolepsy type 1
D) Orexin antagonists (suvorexant, daridorexant) are FDA-approved for insomnia
E) Orexin hyperactivation is implicated in panic disorder
Answer: A, B, C, D, E
Explanation: All are correct. Orexin antagonists are used for insomnia; orexin hyperactivity is found in
panic and some anxiety disorders.
,Q7. Which of the following are correct regarding the role of the immune system in
schizophrenia? (Select all that apply)
A) Maternal immune activation during pregnancy increases schizophrenia risk
B) Elevated interleukin-6 (IL-6) is found in first-episode psychosis
C) Microglial activation is seen on PET imaging in schizophrenia
D) Anti-inflammatory agents (celecoxib) may augment antipsychotic response
E) C-reactive protein (CRP) levels predict treatment resistance
Answer: A, B, C, D, E
Explanation: All are correct. Meta-analyses show anti-inflammatory augmentation improves
symptoms, particularly in early psychosis.
Q8. Which of the following are correct regarding the genetics of antipsychotic response? (Select all
that apply)
A) DRD2 Taq1A (rs1800497) is associated with antipsychotic response
B) HTR2C (rs3813929) is associated with antipsychotic-induced weight gain
C) ANKK1 is in linkage disequilibrium with DRD2
D) COMT Val158Met affects prefrontal dopamine and cognitive response
E) CYP2D6 poor metabolizers have higher antipsychotic levels and EPS risk
Answer: A, B, C, D, E
Explanation: All are correct. Pharmacogenomic testing may guide dosing and side effect prediction.
Q9. Which of the following are correct about the role of the circadian rhythm system in bipolar
disorder? (Select all that apply)
A) Clock gene polymorphisms (CLOCK, ARNTL, PER3) are associated with bipolar disorder
B) Lithium alters circadian rhythms via GSK3β inhibition
C) Light therapy may be effective for bipolar depression
D) Melatonin levels are typically elevated in acute mania
E) Social rhythm disruption can trigger manic episodes
Answer: A, B, C, E
Explanation: Melatonin levels are reduced, not elevated, in mania. Social rhythm therapy is an
evidence-based intervention for bipolar disorder.
Q10. Which of the following are correct about the role of the mineralocorticoid receptor (MR) in
depression? (Select all that apply)
A) MR is activated by aldosterone and cortisol
B) MR has higher affinity for cortisol than glucocorticoid receptor (GR)
C) MR dysfunction is implicated in cognitive impairment in depression
, D) MR antagonists (spironolactone, eplerenone) are antidepressant in animal models
E) Fludrocortisone (MR agonist) has shown antidepressant effects in some studies
Answer: A, B, C, D, E
Explanation: Both MR agonists and antagonists have shown antidepressant effects depending on the
phase and chronicity of stress — a complex area.
Q11. Which of the following are correct about the role of oxidative stress in psychiatric
disorders? (Select all that apply)
A) Elevated lipid peroxidation markers (malondialdehyde) are found in schizophrenia
B) N-acetylcysteine (NAC) has antioxidant and glutamatergic effects
C) NAC is FDA-approved for treatment-resistant schizophrenia
D) NAC reduces negative symptoms and craving in substance use disorders
E) Glutathione levels are reduced in the prefrontal cortex of schizophrenia patients
Answer: A, B, D, E
Explanation: NAC is not FDA-approved for schizophrenia but is used off-label with evidence. It is FDA-
approved for acetaminophen overdose and cystic fibrosis.
Q12. Which of the following are correct about the role of the mTOR pathway in synaptic plasticity and
antidepressant response? (Select all that apply)
A) Ketamine rapidly activates mTORC1 in the prefrontal cortex
B) mTOR activation leads to increased dendritic spine density
C) Rapamycin (mTOR inhibitor) blocks ketamine's antidepressant effects in animal models
D) SSRIs also activate mTOR but with slower kinetics
E) Rapamycin has antidepressant effects in some models
Answer: A, B, C, D, E
Explanation: Complex bidirectional effects. Chronic SSRI increases mTOR; acute ketamine does.
Rapamycin blocks ketamine but may have its own effects under chronic stress.
Q13. Which of the following are correct regarding the role of sigma-1 receptors in
neuropsychiatry? (Select all that apply)
A) Sigma-1 receptors are located on the endoplasmic reticulum
B) Fluvoxamine is a high-affinity sigma-1 agonist
C) Sigma-1 agonists have neuroprotective and antidepressant effects
D) Donepezil is a sigma-1 agonist
E) Sigma-1 antagonists may have antipsychotic effects
Answer: A, B, C, D, E
Explanation: Fluvoxamine, donepezil, and some antipsychotics (e.g., fluvoxamine, donepezil) are
sigma-1 agonists. SPD-1 (sigma-1 antagonist) is being studied for psychosis.
