Regis NU664C Week 10 Final Exam 2025 – Advanced
Practice Questions | 100+ Verified Questions with
Correct Answers | A+ Study Guide
Advanced Pathophysiology (15 Questions)
Question: Which neurotransmitter imbalance is most closely associated with the positive
symptoms of schizophrenia, such as hallucinations and delusions?
Answer: Dopamine excess in the mesolimbic pathway.
Rationale: The dopamine hypothesis of schizophrenia posits that hyperactivity of
dopamine in the mesolimbic pathway contributes to positive symptoms like
hallucinations and delusions. This pathway is critical for reward and motivation, and its
dysregulation is a hallmark of schizophrenia’s psychotic features.
Question: In bipolar disorder, what is the primary pathophysiological mechanism implicated
in mood dysregulation?
Answer: Dysregulation of serotonin and norepinephrine in the prefrontal cortex and
limbic system.
Rationale: Bipolar disorder involves imbalances in monoamine neurotransmitters,
particularly serotonin and norepinephrine, which modulate mood and emotional
regulation. These imbalances affect the prefrontal cortex and limbic system, leading to
manic and depressive episodes.
Question: How does chronic alcohol use affect the GABAergic system in the brain?
Answer: It enhances GABA receptor activity, leading to downregulation of GABA
receptors over time.
Rationale: Chronic alcohol use potentiates GABA-A receptor activity, causing inhibitory
effects. Prolonged exposure leads to receptor downregulation, contributing to tolerance
and withdrawal symptoms like anxiety and seizures.
Question: What role does the hypothalamic-pituitary-adrenal (HPA) axis play in the
pathophysiology of major depressive disorder (MDD)?
Answer: Hyperactivity of the HPA axis leads to elevated cortisol levels, contributing to
depressive symptoms.
Rationale: In MDD, chronic stress activates the HPA axis, resulting in excessive cortisol
release, which disrupts neuroplasticity and contributes to symptoms like anhedonia and
cognitive impairment.
Question: Which brain region is primarily implicated in the pathophysiology of obsessive-
compulsive disorder (OCD)?
Answer: Orbitofrontal cortex and basal ganglia.
, Rationale: OCD is associated with dysfunction in the cortico-striato-thalamo-cortical
circuit, particularly involving the orbitofrontal cortex and basal ganglia, leading to
intrusive thoughts and compulsive behaviors.
Question: How does chronic stress affect neuroplasticity in the hippocampus?
Answer: It reduces neurogenesis and dendritic spine density, impairing memory and
emotional regulation.
Rationale: Chronic stress increases glucocorticoid levels, which suppress hippocampal
neurogenesis and cause dendritic atrophy, contributing to cognitive and mood
disturbances.
Question: What is the primary pathophysiological change in the brain associated with post-
traumatic stress disorder (PTSD)?
Answer: Hyperactivity of the amygdala and hypoactivity of the prefrontal cortex.
Rationale: In PTSD, the amygdala becomes hyperresponsive to threat cues, while the
prefrontal cortex fails to adequately regulate fear responses, leading to hyperarousal and
intrusive memories.
Question: In alcohol use disorder, what is the significance of elevated AST and ALT levels?
Answer: They indicate liver damage due to chronic alcohol consumption.
Rationale: Aspartate aminotransferase (AST) and alanine aminotransferase (ALT) are
liver enzymes elevated in alcohol-induced hepatotoxicity, reflecting hepatocellular injury.
Question: How does serotonin dysregulation contribute to generalized anxiety disorder
(GAD)?
Answer: Reduced serotonin activity in the amygdala and prefrontal cortex increases
anxiety responses.
Rationale: Serotonin modulates fear and anxiety circuits. Low serotonin levels impair
inhibitory control, leading to heightened anxiety and worry in GAD.
Question: What is the role of glutamate in the pathophysiology of schizophrenia?
Answer: Hypofunction of NMDA receptors leads to disrupted glutamatergic signaling.
Rationale: The glutamate hypothesis suggests that NMDA receptor hypofunction in the
prefrontal cortex contributes to cognitive deficits and negative symptoms in
schizophrenia.
Question: How does chronic opioid use affect the brain’s reward system?
Answer: It causes downregulation of mu-opioid receptors and dopamine dysregulation.
Rationale: Chronic opioid use overstimulates mu-opioid receptors, leading to receptor
downregulation and reduced dopamine release in the nucleus accumbens, contributing to
dependence.
Question: What is the significance of reduced brain-derived neurotrophic factor (BDNF) in
depression?
Answer: It impairs neuroplasticity and neuronal survival, exacerbating depressive
symptoms.
Practice Questions | 100+ Verified Questions with
Correct Answers | A+ Study Guide
Advanced Pathophysiology (15 Questions)
Question: Which neurotransmitter imbalance is most closely associated with the positive
symptoms of schizophrenia, such as hallucinations and delusions?
Answer: Dopamine excess in the mesolimbic pathway.
Rationale: The dopamine hypothesis of schizophrenia posits that hyperactivity of
dopamine in the mesolimbic pathway contributes to positive symptoms like
hallucinations and delusions. This pathway is critical for reward and motivation, and its
dysregulation is a hallmark of schizophrenia’s psychotic features.
Question: In bipolar disorder, what is the primary pathophysiological mechanism implicated
in mood dysregulation?
Answer: Dysregulation of serotonin and norepinephrine in the prefrontal cortex and
limbic system.
Rationale: Bipolar disorder involves imbalances in monoamine neurotransmitters,
particularly serotonin and norepinephrine, which modulate mood and emotional
regulation. These imbalances affect the prefrontal cortex and limbic system, leading to
manic and depressive episodes.
Question: How does chronic alcohol use affect the GABAergic system in the brain?
Answer: It enhances GABA receptor activity, leading to downregulation of GABA
receptors over time.
Rationale: Chronic alcohol use potentiates GABA-A receptor activity, causing inhibitory
effects. Prolonged exposure leads to receptor downregulation, contributing to tolerance
and withdrawal symptoms like anxiety and seizures.
Question: What role does the hypothalamic-pituitary-adrenal (HPA) axis play in the
pathophysiology of major depressive disorder (MDD)?
Answer: Hyperactivity of the HPA axis leads to elevated cortisol levels, contributing to
depressive symptoms.
Rationale: In MDD, chronic stress activates the HPA axis, resulting in excessive cortisol
release, which disrupts neuroplasticity and contributes to symptoms like anhedonia and
cognitive impairment.
Question: Which brain region is primarily implicated in the pathophysiology of obsessive-
compulsive disorder (OCD)?
Answer: Orbitofrontal cortex and basal ganglia.
, Rationale: OCD is associated with dysfunction in the cortico-striato-thalamo-cortical
circuit, particularly involving the orbitofrontal cortex and basal ganglia, leading to
intrusive thoughts and compulsive behaviors.
Question: How does chronic stress affect neuroplasticity in the hippocampus?
Answer: It reduces neurogenesis and dendritic spine density, impairing memory and
emotional regulation.
Rationale: Chronic stress increases glucocorticoid levels, which suppress hippocampal
neurogenesis and cause dendritic atrophy, contributing to cognitive and mood
disturbances.
Question: What is the primary pathophysiological change in the brain associated with post-
traumatic stress disorder (PTSD)?
Answer: Hyperactivity of the amygdala and hypoactivity of the prefrontal cortex.
Rationale: In PTSD, the amygdala becomes hyperresponsive to threat cues, while the
prefrontal cortex fails to adequately regulate fear responses, leading to hyperarousal and
intrusive memories.
Question: In alcohol use disorder, what is the significance of elevated AST and ALT levels?
Answer: They indicate liver damage due to chronic alcohol consumption.
Rationale: Aspartate aminotransferase (AST) and alanine aminotransferase (ALT) are
liver enzymes elevated in alcohol-induced hepatotoxicity, reflecting hepatocellular injury.
Question: How does serotonin dysregulation contribute to generalized anxiety disorder
(GAD)?
Answer: Reduced serotonin activity in the amygdala and prefrontal cortex increases
anxiety responses.
Rationale: Serotonin modulates fear and anxiety circuits. Low serotonin levels impair
inhibitory control, leading to heightened anxiety and worry in GAD.
Question: What is the role of glutamate in the pathophysiology of schizophrenia?
Answer: Hypofunction of NMDA receptors leads to disrupted glutamatergic signaling.
Rationale: The glutamate hypothesis suggests that NMDA receptor hypofunction in the
prefrontal cortex contributes to cognitive deficits and negative symptoms in
schizophrenia.
Question: How does chronic opioid use affect the brain’s reward system?
Answer: It causes downregulation of mu-opioid receptors and dopamine dysregulation.
Rationale: Chronic opioid use overstimulates mu-opioid receptors, leading to receptor
downregulation and reduced dopamine release in the nucleus accumbens, contributing to
dependence.
Question: What is the significance of reduced brain-derived neurotrophic factor (BDNF) in
depression?
Answer: It impairs neuroplasticity and neuronal survival, exacerbating depressive
symptoms.
