2026/2027 Exam Questions and
Answers | Already Graded A+
What is pharmacodynamics? - ANSWER ✔✔The study of what drugs
do to the body, including receptor interactions and mechanisms of
action. Rationale: Explains therapeutic and adverse effects. Stahl Pearl:
Most psychotropics alter neurotransmitter signaling. Carlat Pearl:
Understanding mechanisms helps anticipate side effects. D345 Tip:
"Drug → Body."
What is pharmacokinetics? - ANSWER ✔✔The study of what the
body does to drugs through absorption, distribution, metabolism, and
,excretion. Rationale: Determines drug levels and duration. Stahl Pearl:
Think ADME. Carlat Pearl: Explains why dosing schedules differ. D345
Tip: "Body → Drug."
What does ADME stand for? - ANSWER ✔✔Absorption, Distribution,
Metabolism, and Excretion. Rationale: Fundamental pharmacokinetic
processes. Stahl Pearl: Drug journey through the body. Carlat Pearl:
ADME affects onset and toxicity.
What is an agonist? - ANSWER ✔✔A drug that binds to and activates
a receptor. Rationale: Mimics endogenous neurotransmitters. Stahl
Pearl: Turns receptors "on." Carlat Pearl: Often produces predictable
physiologic effects.
What is an antagonist? - ANSWER ✔✔A drug that binds to a receptor
and blocks activation. Rationale: Prevents neurotransmitter effects. Stahl
Pearl: Occupies receptors without activating them. Carlat Pearl: Many
antipsychotics work this way.
What is a partial agonist? - ANSWER ✔✔A drug that activates
receptors but produces a smaller effect than a full agonist. Rationale:
Stabilizes neurotransmission. Stahl Pearl: Acts as a "dimmer switch."
Carlat Pearl: Aripiprazole is the classic example.
,What is receptor affinity? - ANSWER ✔✔The strength with which a
drug binds to a receptor. Rationale: High affinity often means prolonged
occupancy. Stahl Pearl: Affinity influences potency.
What is receptor selectivity? - ANSWER ✔✔A drug's preference for
certain receptors over others. Rationale: Determines efficacy and side
effect profiles. Carlat Pearl: More selective drugs often have cleaner side
effect profiles.
What is potency? - ANSWER ✔✔The amount of drug required to
produce an effect. Rationale: More potent drugs require lower doses.
Stahl Pearl: Potency does not equal efficacy.
What is efficacy? - ANSWER ✔✔The maximum effect a drug can
produce. Rationale: Determines therapeutic ceiling. Stahl Pearl: Efficacy
answers "How well does it work?"
What neurotransmitter is most associated with psychosis and reward? -
ANSWER ✔✔Dopamine. Rationale: Excess mesolimbic dopamine
contributes to positive symptoms. Stahl Pearl: The "salience"
neurotransmitter.
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, What neurotransmitter is most associated with mood and anxiety? -
ANSWER ✔✔Serotonin. Rationale: Modulates mood, appetite, sleep,
and anxiety. Carlat Pearl: Most antidepressants target serotonin.
What neurotransmitter is associated with alertness and energy? -
ANSWER ✔✔Norepinephrine. Rationale: Influences attention and
vigilance. Stahl Pearl: The "fight-or-flight" neurotransmitter.
What neurotransmitter is involved in memory and cognition? -
ANSWER ✔✔Acetylcholine. Rationale: Cholinergic deficits occur in
dementia. Carlat Pearl: Anticholinergic medications worsen cognition.
What is the major inhibitory neurotransmitter? - ANSWER ✔✔GABA.
Rationale: Reduces neuronal firing. Stahl Pearl: Benzodiazepines
enhance GABA-A activity.
What is the major excitatory neurotransmitter? - ANSWER
✔✔Glutamate. Rationale: Essential for learning and memory. Stahl
Pearl: NMDA receptor modulation is a future treatment frontier.
What dopamine pathway is associated with positive symptoms? -
ANSWER ✔✔Mesolimbic. Rationale: Hyperactivity contributes to
hallucinations and delusions.