NUR 6011/NUR6011 Exam 1 V2 | Advance
Pharmacology Q&A with Rationale |
William Paterson University
1. Which pharmacokinetic process is primarily affected by the ‘first-pass effect’ following oral
administration?
A. Excretion
B. Distribution
C. Absorption
D. Metabolism
Correct Answer: D
Expert Explanation: The first-pass effect refers to the rapid hepatic metabolism of a drug
before it reaches the systemic circulation. This process significantly reduces the
bioavailability of certain medications administered orally. Understanding this allows
providers to adjust dosages or choose alternative routes like sublingual or intravenous
administration.
2. A drug with a high volume of distribution (Vd) is characterized by which of the following?
A. Extensive distribution into tissues
B. High plasma concentration
C. Low lipid solubility
,D. High protein binding to albumin
Correct Answer: A
Expert Explanation: A high volume of distribution indicates that the drug has left the
plasma and distributed extensively into body tissues. These drugs are typically lipid-
soluble and may accumulate in fat or other compartments. This parameter helps clinicians
understand how much drug is needed to achieve a target plasma concentration.
3. How many half-lives are generally required for a drug to reach a steady-state concentration
in the plasma?
A. 1 to 2 half-lives
B. 8 to 10 half-lives
C. 4 to 5 half-lives
D. Only one large loading dose is needed
Correct Answer: C
Expert Explanation: Steady state is reached when the rate of drug administration equals
the rate of drug elimination. It typically takes about four to five half-lives for the plasma
concentration to stabilize during continuous dosing. Knowing this timeframe is crucial for
timing therapeutic drug monitoring and assessing the full effect of a medication.
4. Which schedule of controlled substances has the highest potential for abuse while still
having an accepted medical use?
A. Schedule I
, B. Schedule III
C. Schedule II
D. Schedule IV
Correct Answer: C
Expert Explanation: Schedule II drugs have a high potential for abuse which may lead to
severe psychological or physical dependence. Unlike Schedule I substances, they have
currently accepted medical uses in treatment. Prescribing these drugs requires strict
adherence to federal laws, such as no refills without a new prescription.
5. What is the primary function of a drug that acts as a ‘competitive antagonist’ at a receptor
site?
A. It binds to the same site as the agonist but does not activate it.
B. It binds to a different site than the agonist to inhibit it.
C. It activates the receptor to its maximum potential.
D. It irreversibly bonds to the receptor, destroying it.
Correct Answer: A
Expert Explanation: A competitive antagonist competes with the endogenous agonist for
the same binding site on a receptor. It does not produce a biological response itself but
prevents the agonist from binding. The effect can be overcome by increasing the
concentration of the agonist, which shifts the dose-response curve to the right.
Pharmacology Q&A with Rationale |
William Paterson University
1. Which pharmacokinetic process is primarily affected by the ‘first-pass effect’ following oral
administration?
A. Excretion
B. Distribution
C. Absorption
D. Metabolism
Correct Answer: D
Expert Explanation: The first-pass effect refers to the rapid hepatic metabolism of a drug
before it reaches the systemic circulation. This process significantly reduces the
bioavailability of certain medications administered orally. Understanding this allows
providers to adjust dosages or choose alternative routes like sublingual or intravenous
administration.
2. A drug with a high volume of distribution (Vd) is characterized by which of the following?
A. Extensive distribution into tissues
B. High plasma concentration
C. Low lipid solubility
,D. High protein binding to albumin
Correct Answer: A
Expert Explanation: A high volume of distribution indicates that the drug has left the
plasma and distributed extensively into body tissues. These drugs are typically lipid-
soluble and may accumulate in fat or other compartments. This parameter helps clinicians
understand how much drug is needed to achieve a target plasma concentration.
3. How many half-lives are generally required for a drug to reach a steady-state concentration
in the plasma?
A. 1 to 2 half-lives
B. 8 to 10 half-lives
C. 4 to 5 half-lives
D. Only one large loading dose is needed
Correct Answer: C
Expert Explanation: Steady state is reached when the rate of drug administration equals
the rate of drug elimination. It typically takes about four to five half-lives for the plasma
concentration to stabilize during continuous dosing. Knowing this timeframe is crucial for
timing therapeutic drug monitoring and assessing the full effect of a medication.
4. Which schedule of controlled substances has the highest potential for abuse while still
having an accepted medical use?
A. Schedule I
, B. Schedule III
C. Schedule II
D. Schedule IV
Correct Answer: C
Expert Explanation: Schedule II drugs have a high potential for abuse which may lead to
severe psychological or physical dependence. Unlike Schedule I substances, they have
currently accepted medical uses in treatment. Prescribing these drugs requires strict
adherence to federal laws, such as no refills without a new prescription.
5. What is the primary function of a drug that acts as a ‘competitive antagonist’ at a receptor
site?
A. It binds to the same site as the agonist but does not activate it.
B. It binds to a different site than the agonist to inhibit it.
C. It activates the receptor to its maximum potential.
D. It irreversibly bonds to the receptor, destroying it.
Correct Answer: A
Expert Explanation: A competitive antagonist competes with the endogenous agonist for
the same binding site on a receptor. It does not produce a biological response itself but
prevents the agonist from binding. The effect can be overcome by increasing the
concentration of the agonist, which shifts the dose-response curve to the right.
