Wgu D116 Advanced Pharmacology Final Exam Objective
Assement & Pre-Assesment 300 Questions And Answers
Latest Update This Year - Just Released
Question 1
Which pharmacokinetic phase is altered by the first-pass effect?
A) Absorption
B) Distribution
C) Metabolism
D) Excretion
Answer
Answer: C
Rationale
The first-pass effect refers to hepatic metabolism of an orally administered drug before it reaches
systemic circulation, reducing bioavailability and requiring higher oral doses for drugs with extensive
first-pass metabolism.
Question 2
Which patient factor most significantly reduces drug clearance?
A) Increased body temperature
B) Decreased creatinine clearance
C) Increased dietary fiber
D) Decreased gastric pH
Answer
Answer: B
Rationale
Reduced creatinine clearance reflects impaired renal function, decreasing elimination of renally
cleared drugs and requiring dose adjustment to prevent accumulation and toxicity.
,Question 3
Which term describes the proportion of an administered dose reaching systemic circulation
unchanged?
A) Half-life
B) Bioavailability
C) Volume of distribution
D) Clearance
Answer
Answer: B
Rationale
Bioavailability is the fraction of an administered dose that reaches systemic circulation in an
unchanged form, with intravenous administration defined as 100%.
Question 4
A drug with a narrow therapeutic index requires:
A) No monitoring
B) Therapeutic drug monitoring
C) Higher doses
D) Less frequent dosing
Answer
Answer: B
Rationale
Narrow therapeutic index drugs have small margins between therapeutic and toxic concentrations,
requiring serum level monitoring to maintain efficacy while preventing toxicity.
Question 5
Which receptor type is a ligand-gated ion channel?
A) Nicotinic acetylcholine receptor
B) Beta-adrenergic receptor
2
,C) Insulin receptor
D) Steroid receptor
Answer
Answer: A
Rationale
The nicotinic acetylcholine receptor is a ligand-gated ion channel that opens to allow sodium influx
upon acetylcholine binding, producing rapid depolarization.
Question 6
Which term describes two drugs combining to produce an effect greater than the sum of their
individual effects?
A) Antagonism
B) Additivity
C) Synergism
D) Potentiation
Answer
Answer: C
Rationale
Synergism occurs when the combined effect of two drugs exceeds the sum of their individual effects,
such as the combined bactericidal effect of trimethoprim and sulfamethoxazole.
Question 7
Which cytochrome P450 enzyme metabolizes the greatest number of drugs?
A) CYP2C9
B) CYP2D6
C) CYP3A4
D) CYP1A2
Answer
3
, Answer: C
Rationale
CYP3A4 is responsible for the metabolism of approximately half of all clinically used drugs, making it
the most important enzyme for drug interactions.
Question 8
Which drug interaction occurs when one agent induces CYP3A4?
A) Increased levels of CYP3A4 substrates
B) Decreased levels of CYP3A4 substrates
C) No change in substrate levels
D) Increased renal excretion
Answer
Answer: B
Rationale
CYP3A4 inducers increase enzyme activity, accelerating metabolism of substrate drugs and
decreasing their plasma concentrations, potentially reducing therapeutic effect.
Question 9
Which of the following is a CYP3A4 inhibitor that commonly causes drug interactions?
A) Rifampin
B) Carbamazepine
C) Ketoconazole
D) Phenytoin
Answer
Answer: C
Rationale
Ketoconazole is a potent CYP3A4 inhibitor that can increase concentrations of co-administered
CYP3A4 substrates, risking toxicity.
4
Assement & Pre-Assesment 300 Questions And Answers
Latest Update This Year - Just Released
Question 1
Which pharmacokinetic phase is altered by the first-pass effect?
A) Absorption
B) Distribution
C) Metabolism
D) Excretion
Answer
Answer: C
Rationale
The first-pass effect refers to hepatic metabolism of an orally administered drug before it reaches
systemic circulation, reducing bioavailability and requiring higher oral doses for drugs with extensive
first-pass metabolism.
Question 2
Which patient factor most significantly reduces drug clearance?
A) Increased body temperature
B) Decreased creatinine clearance
C) Increased dietary fiber
D) Decreased gastric pH
Answer
Answer: B
Rationale
Reduced creatinine clearance reflects impaired renal function, decreasing elimination of renally
cleared drugs and requiring dose adjustment to prevent accumulation and toxicity.
,Question 3
Which term describes the proportion of an administered dose reaching systemic circulation
unchanged?
A) Half-life
B) Bioavailability
C) Volume of distribution
D) Clearance
Answer
Answer: B
Rationale
Bioavailability is the fraction of an administered dose that reaches systemic circulation in an
unchanged form, with intravenous administration defined as 100%.
Question 4
A drug with a narrow therapeutic index requires:
A) No monitoring
B) Therapeutic drug monitoring
C) Higher doses
D) Less frequent dosing
Answer
Answer: B
Rationale
Narrow therapeutic index drugs have small margins between therapeutic and toxic concentrations,
requiring serum level monitoring to maintain efficacy while preventing toxicity.
Question 5
Which receptor type is a ligand-gated ion channel?
A) Nicotinic acetylcholine receptor
B) Beta-adrenergic receptor
2
,C) Insulin receptor
D) Steroid receptor
Answer
Answer: A
Rationale
The nicotinic acetylcholine receptor is a ligand-gated ion channel that opens to allow sodium influx
upon acetylcholine binding, producing rapid depolarization.
Question 6
Which term describes two drugs combining to produce an effect greater than the sum of their
individual effects?
A) Antagonism
B) Additivity
C) Synergism
D) Potentiation
Answer
Answer: C
Rationale
Synergism occurs when the combined effect of two drugs exceeds the sum of their individual effects,
such as the combined bactericidal effect of trimethoprim and sulfamethoxazole.
Question 7
Which cytochrome P450 enzyme metabolizes the greatest number of drugs?
A) CYP2C9
B) CYP2D6
C) CYP3A4
D) CYP1A2
Answer
3
, Answer: C
Rationale
CYP3A4 is responsible for the metabolism of approximately half of all clinically used drugs, making it
the most important enzyme for drug interactions.
Question 8
Which drug interaction occurs when one agent induces CYP3A4?
A) Increased levels of CYP3A4 substrates
B) Decreased levels of CYP3A4 substrates
C) No change in substrate levels
D) Increased renal excretion
Answer
Answer: B
Rationale
CYP3A4 inducers increase enzyme activity, accelerating metabolism of substrate drugs and
decreasing their plasma concentrations, potentially reducing therapeutic effect.
Question 9
Which of the following is a CYP3A4 inhibitor that commonly causes drug interactions?
A) Rifampin
B) Carbamazepine
C) Ketoconazole
D) Phenytoin
Answer
Answer: C
Rationale
Ketoconazole is a potent CYP3A4 inhibitor that can increase concentrations of co-administered
CYP3A4 substrates, risking toxicity.
4
