NURS 6630 MIDTERM EXAM 2021 / NURS6630
MIDTERM EXAM 2021
1. A PMHNP is explaining how most psychotropic medications produce their effects. Which
statement is most accurate?
A. They primarily act by directly altering DNA transcription
B. They typically act on G-protein linked receptors and have antagonistic properties
C. They work exclusively by blocking ion channels
D. They increase neurotransmitter synthesis in the postsynaptic neuron
Correct Answer: B
Rationale: Most psychotropic medications in clinical practice act on G-protein linked
receptors and exhibit antagonistic properties at those receptors .
2. A patient asks why psychiatric medications often take weeks to work. The PMHNP should
explain that this delay is primarily due to:
A. Slow absorption from the gastrointestinal tract
B. The time required for receptor-level adaptive changes
C. The blood-brain barrier blocking most of the drug
D. Rapid metabolism by the liver
Correct Answer: B
Rationale: Therapeutic effects of many psychotropic drugs, especially antidepressants,
depend on adaptive changes at the receptor level (e.g., downregulation, altered second
messenger signaling), not simply drug accumulation.
3. Which statement about the dopamine hypothesis of schizophrenia is correct?
A. Hyperactivity in the mesolimbic dopamine pathway mediates positive symptoms
B. Dopamine deficiency causes all symptoms of schizophrenia
C. The nigrostriatal pathway is primarily involved in psychosis
D. Dopamine has no role in schizophrenia
Correct Answer: A
Rationale: The dopamine hypothesis holds that hyperactivity in the mesolimbic dopamine
pathway mediates positive symptoms of schizophrenia, such as hallucinations and delusions .
4. A patient on antipsychotic therapy develops symptoms of apathy, anhedonia, and social
withdrawal. The PMHNP should suspect blockade of D2 receptors in which pathway?
A. Mesolimbic pathway
,B. Mesocortical pathway
C. Nigrostriatal pathway
D. Tuberoinfundibular pathway
Correct Answer: B
Rationale: D2 blockade in the mesocortical pathway can produce negative symptoms such
as apathy, anhedonia, and social withdrawal .
5. Which neurotransmitter is primarily associated with learning and memory and is deficient
in Alzheimer's disease?
A. Dopamine
B. Serotonin
C. Acetylcholine
D. Norepinephrine
Correct Answer: C
Rationale: Acetylcholine is critical for learning and memory; deterioration of acetylcholine
neurons is seen in Alzheimer's disease .
6. A PMHNP understands that the cytochrome P450 enzyme system is significant because:
A. It determines the color of medications
B. It affects drug bioavailability and can alter drug levels
C. It only metabolizes psychiatric medications
D. It has no clinical relevance
Correct Answer: B
Rationale: The CYP450 system affects the bioavailability of medications after they pass
through the stomach and liver, making it important for safe prescribing and monitoring .
7. Which statement about genetic differences in drug metabolism is true?
A. All ethnic groups metabolize drugs at the same rate
B. About 1 in 5 Asians requires lower-than-normal doses of some antidepressants and
antipsychotics
C. Genetic factors do not affect drug metabolism
D. Only Caucasians have CYP450 polymorphisms
Correct Answer: B
Rationale: About 1 in 5 Asians requires lower-than-normal doses of some antidepressants
and antipsychotics due to genetic differences in drug metabolism .
,8. A patient taking clozapine smokes cigarettes. The PMHNP should recognize that this may
affect the dose needed because:
A. Smoking decreases clozapine metabolism
B. Smoking induces CYP1A2, potentially requiring higher clozapine doses
C. Smoking has no effect on clozapine
D. Smoking increases clozapine levels
Correct Answer: B
Rationale: Cigarette smoking induces CYP1A2, which metabolizes clozapine and other
antipsychotics, often requiring dose adjustments .
9. Which of the following is a characteristic of ligand-gated ion channels?
A. Slow, prolonged effects
B. Almost immediate effects
C. Only found in the peripheral nervous system
D. Not involved in neurotransmission
Correct Answer: B
Rationale: Ligand-gated ion channels produce almost immediate effects because they
directly open ion channels upon neurotransmitter binding .
10. Which receptors share the characteristic of being ligand-gated ion channels with a
pentameric structure?
A. Dopamine and serotonin receptors
B. Nicotinic, cholinergic, serotonin 3, and glycine receptors
C. GABA-A and glutamate receptors
D. All G-protein linked receptors
Correct Answer: B
Rationale: Nicotinic, cholinergic, serotonin 3, and glycine receptors are all ligand-gated ion
channels with a pentameric structure .
11. SATA — Which of the following are true regarding neurotransmitters?
A. Serotonin is involved in mood, sleep, and appetite regulation
B. Dopamine is linked to psychosis when excessive
C. GABA is the major excitatory neurotransmitter
D. Glutamate is the most common neurotransmitter in the CNS
E. Acetylcholine triggers voluntary muscle contraction
Correct Answer: A, B, D, E
Rationale: GABA is the major inhibitory neurotransmitter, not excitatory .
, 12. The PMHNP is reviewing brain anatomy. The primary "input zone" of the neuron is
generally considered to be the:
A. Axon
B. Dendrites
C. Soma
D. Axon hillock
Correct Answer: B
Rationale: Dendrites are the primary input zone, receiving signals from other neurons .
13. Action potentials are first generated at the axon hillock because this is where which
structures are located?
A. Non-gated K+ channels
B. Na+/K+ pumps
C. Voltage-gated Na+ channels
D. Transporters
Correct Answer: C
Rationale: Voltage-gated sodium channels are concentrated at the axon hillock, the site of
action potential initiation .
14. The most common type of synapse in the brain is the:
A. Axoaxonic synapse
B. Axosomatic synapse
C. Axodendritic synapse
D. Presynaptic inhibition synapse
Correct Answer: C
Rationale: Axodendritic synapses are the most common type in the brain .
15. The direct effect of depolarization of the presynaptic nerve terminal by the action
potential is:
A. Opening of voltage-gated Ca2+ channels
B. Docking of vesicles at active zones
C. Packaging of neurotransmitter into vesicles
D. Activation of autoreceptors
Correct Answer: A
Rationale: Depolarization opens voltage-gated calcium channels, allowing Ca2+ influx that
triggers neurotransmitter release .
MIDTERM EXAM 2021
1. A PMHNP is explaining how most psychotropic medications produce their effects. Which
statement is most accurate?
A. They primarily act by directly altering DNA transcription
B. They typically act on G-protein linked receptors and have antagonistic properties
C. They work exclusively by blocking ion channels
D. They increase neurotransmitter synthesis in the postsynaptic neuron
Correct Answer: B
Rationale: Most psychotropic medications in clinical practice act on G-protein linked
receptors and exhibit antagonistic properties at those receptors .
2. A patient asks why psychiatric medications often take weeks to work. The PMHNP should
explain that this delay is primarily due to:
A. Slow absorption from the gastrointestinal tract
B. The time required for receptor-level adaptive changes
C. The blood-brain barrier blocking most of the drug
D. Rapid metabolism by the liver
Correct Answer: B
Rationale: Therapeutic effects of many psychotropic drugs, especially antidepressants,
depend on adaptive changes at the receptor level (e.g., downregulation, altered second
messenger signaling), not simply drug accumulation.
3. Which statement about the dopamine hypothesis of schizophrenia is correct?
A. Hyperactivity in the mesolimbic dopamine pathway mediates positive symptoms
B. Dopamine deficiency causes all symptoms of schizophrenia
C. The nigrostriatal pathway is primarily involved in psychosis
D. Dopamine has no role in schizophrenia
Correct Answer: A
Rationale: The dopamine hypothesis holds that hyperactivity in the mesolimbic dopamine
pathway mediates positive symptoms of schizophrenia, such as hallucinations and delusions .
4. A patient on antipsychotic therapy develops symptoms of apathy, anhedonia, and social
withdrawal. The PMHNP should suspect blockade of D2 receptors in which pathway?
A. Mesolimbic pathway
,B. Mesocortical pathway
C. Nigrostriatal pathway
D. Tuberoinfundibular pathway
Correct Answer: B
Rationale: D2 blockade in the mesocortical pathway can produce negative symptoms such
as apathy, anhedonia, and social withdrawal .
5. Which neurotransmitter is primarily associated with learning and memory and is deficient
in Alzheimer's disease?
A. Dopamine
B. Serotonin
C. Acetylcholine
D. Norepinephrine
Correct Answer: C
Rationale: Acetylcholine is critical for learning and memory; deterioration of acetylcholine
neurons is seen in Alzheimer's disease .
6. A PMHNP understands that the cytochrome P450 enzyme system is significant because:
A. It determines the color of medications
B. It affects drug bioavailability and can alter drug levels
C. It only metabolizes psychiatric medications
D. It has no clinical relevance
Correct Answer: B
Rationale: The CYP450 system affects the bioavailability of medications after they pass
through the stomach and liver, making it important for safe prescribing and monitoring .
7. Which statement about genetic differences in drug metabolism is true?
A. All ethnic groups metabolize drugs at the same rate
B. About 1 in 5 Asians requires lower-than-normal doses of some antidepressants and
antipsychotics
C. Genetic factors do not affect drug metabolism
D. Only Caucasians have CYP450 polymorphisms
Correct Answer: B
Rationale: About 1 in 5 Asians requires lower-than-normal doses of some antidepressants
and antipsychotics due to genetic differences in drug metabolism .
,8. A patient taking clozapine smokes cigarettes. The PMHNP should recognize that this may
affect the dose needed because:
A. Smoking decreases clozapine metabolism
B. Smoking induces CYP1A2, potentially requiring higher clozapine doses
C. Smoking has no effect on clozapine
D. Smoking increases clozapine levels
Correct Answer: B
Rationale: Cigarette smoking induces CYP1A2, which metabolizes clozapine and other
antipsychotics, often requiring dose adjustments .
9. Which of the following is a characteristic of ligand-gated ion channels?
A. Slow, prolonged effects
B. Almost immediate effects
C. Only found in the peripheral nervous system
D. Not involved in neurotransmission
Correct Answer: B
Rationale: Ligand-gated ion channels produce almost immediate effects because they
directly open ion channels upon neurotransmitter binding .
10. Which receptors share the characteristic of being ligand-gated ion channels with a
pentameric structure?
A. Dopamine and serotonin receptors
B. Nicotinic, cholinergic, serotonin 3, and glycine receptors
C. GABA-A and glutamate receptors
D. All G-protein linked receptors
Correct Answer: B
Rationale: Nicotinic, cholinergic, serotonin 3, and glycine receptors are all ligand-gated ion
channels with a pentameric structure .
11. SATA — Which of the following are true regarding neurotransmitters?
A. Serotonin is involved in mood, sleep, and appetite regulation
B. Dopamine is linked to psychosis when excessive
C. GABA is the major excitatory neurotransmitter
D. Glutamate is the most common neurotransmitter in the CNS
E. Acetylcholine triggers voluntary muscle contraction
Correct Answer: A, B, D, E
Rationale: GABA is the major inhibitory neurotransmitter, not excitatory .
, 12. The PMHNP is reviewing brain anatomy. The primary "input zone" of the neuron is
generally considered to be the:
A. Axon
B. Dendrites
C. Soma
D. Axon hillock
Correct Answer: B
Rationale: Dendrites are the primary input zone, receiving signals from other neurons .
13. Action potentials are first generated at the axon hillock because this is where which
structures are located?
A. Non-gated K+ channels
B. Na+/K+ pumps
C. Voltage-gated Na+ channels
D. Transporters
Correct Answer: C
Rationale: Voltage-gated sodium channels are concentrated at the axon hillock, the site of
action potential initiation .
14. The most common type of synapse in the brain is the:
A. Axoaxonic synapse
B. Axosomatic synapse
C. Axodendritic synapse
D. Presynaptic inhibition synapse
Correct Answer: C
Rationale: Axodendritic synapses are the most common type in the brain .
15. The direct effect of depolarization of the presynaptic nerve terminal by the action
potential is:
A. Opening of voltage-gated Ca2+ channels
B. Docking of vesicles at active zones
C. Packaging of neurotransmitter into vesicles
D. Activation of autoreceptors
Correct Answer: A
Rationale: Depolarization opens voltage-gated calcium channels, allowing Ca2+ influx that
triggers neurotransmitter release .
