NUR 5461 ADVANCED
PHARMACOLOGY EXAM 1 QUESTIONS
AND CORRECT ANSWERS 2026/2027
1. Which phase of pharmacokinetics is most significantly affected by a patient’s genetic
polymorphism of the CYP2D6 enzyme?
A. Absorption
B. Distribution
C. Excretion
D. Metabolism
Answer: D
Conceptual Explanation: CYP2D6 is a major hepatic enzyme involved in the metabolism
of many drugs; polymorphisms can lead to poor or ultra-rapid metabolism of substrates.
2. A drug with a high volume of distribution (Vd) suggests which of the following
characteristics?
A. The drug is likely lipophilic and distributed into tissues.
B. The drug is highly protein-bound in the blood.
C. The drug is confined to the plasma compartment.
D. The drug is rapidly excreted by the kidneys.
,Answer: A
Conceptual Explanation: A high Vd indicates that the drug has left the plasma and
distributed extensively into body tissues, often due to lipophilicity.
3. In the context of the Dose-Response relationship, what does the term ‘Efficacy’ represent?
A. The amount of drug required to produce an effect.
B. The affinity of the drug for its receptor.
C. The rate at which a drug is absorbed.
D. The maximum effect a drug can produce regardless of dose.
Answer: D
Conceptual Explanation: Efficacy refers to the maximal response (Emax) a drug can
produce, whereas potency refers to the dose required to achieve a specific effect.
4. Which mechanism describes an ‘Irreversible Antagonist’?
A. It competes for the same site and can be overcome by increasing agonist concentration.
B. It binds to an allosteric site to increase agonist affinity.
C. It binds covalently to the receptor, and its effects cannot be overcome by more agonist.
D. It acts as a physiological antagonist by activating a different pathway.
Answer: C
, Conceptual Explanation: Irreversible antagonists form covalent bonds with receptors,
permanently disabling them; increasing the agonist concentration does not displace them.
5. Steady-state concentration (Css) of a drug is typically reached after approximately how
many half-lives?
A. 1 to 2 half-lives
B. 2 to 3 half-lives
C. 4 to 5 half-lives
D. 8 to 10 half-lives
Answer: C
Conceptual Explanation: It takes approximately 4 to 5 half-lives of consistent dosing to
reach a steady state where the rate of administration equals the rate of elimination.
6. A patient is prescribed a prodrug. Which statement is true regarding this medication?
A. It is active upon administration.
B. It bypasses the liver entirely.
C. It has a 100% bioavailability regardless of the route.
D. It requires metabolic conversion to become pharmacologically active.
Answer: D
Conceptual Explanation: Prodrugs are inactive compounds that must undergo enzymatic
conversion (usually in the liver) to their active form.
PHARMACOLOGY EXAM 1 QUESTIONS
AND CORRECT ANSWERS 2026/2027
1. Which phase of pharmacokinetics is most significantly affected by a patient’s genetic
polymorphism of the CYP2D6 enzyme?
A. Absorption
B. Distribution
C. Excretion
D. Metabolism
Answer: D
Conceptual Explanation: CYP2D6 is a major hepatic enzyme involved in the metabolism
of many drugs; polymorphisms can lead to poor or ultra-rapid metabolism of substrates.
2. A drug with a high volume of distribution (Vd) suggests which of the following
characteristics?
A. The drug is likely lipophilic and distributed into tissues.
B. The drug is highly protein-bound in the blood.
C. The drug is confined to the plasma compartment.
D. The drug is rapidly excreted by the kidneys.
,Answer: A
Conceptual Explanation: A high Vd indicates that the drug has left the plasma and
distributed extensively into body tissues, often due to lipophilicity.
3. In the context of the Dose-Response relationship, what does the term ‘Efficacy’ represent?
A. The amount of drug required to produce an effect.
B. The affinity of the drug for its receptor.
C. The rate at which a drug is absorbed.
D. The maximum effect a drug can produce regardless of dose.
Answer: D
Conceptual Explanation: Efficacy refers to the maximal response (Emax) a drug can
produce, whereas potency refers to the dose required to achieve a specific effect.
4. Which mechanism describes an ‘Irreversible Antagonist’?
A. It competes for the same site and can be overcome by increasing agonist concentration.
B. It binds to an allosteric site to increase agonist affinity.
C. It binds covalently to the receptor, and its effects cannot be overcome by more agonist.
D. It acts as a physiological antagonist by activating a different pathway.
Answer: C
, Conceptual Explanation: Irreversible antagonists form covalent bonds with receptors,
permanently disabling them; increasing the agonist concentration does not displace them.
5. Steady-state concentration (Css) of a drug is typically reached after approximately how
many half-lives?
A. 1 to 2 half-lives
B. 2 to 3 half-lives
C. 4 to 5 half-lives
D. 8 to 10 half-lives
Answer: C
Conceptual Explanation: It takes approximately 4 to 5 half-lives of consistent dosing to
reach a steady state where the rate of administration equals the rate of elimination.
6. A patient is prescribed a prodrug. Which statement is true regarding this medication?
A. It is active upon administration.
B. It bypasses the liver entirely.
C. It has a 100% bioavailability regardless of the route.
D. It requires metabolic conversion to become pharmacologically active.
Answer: D
Conceptual Explanation: Prodrugs are inactive compounds that must undergo enzymatic
conversion (usually in the liver) to their active form.
