Wilkes University NSG 533 Exam 1 (pdf) | 2026/2027 |
Advanced Pharmacology Q&A | Nursing
1. Which term describes the study of functional changes in the body resulting from
disease?
A) Etiology
B) Pathogenesis
C) Pathophysiology
D) Epidemiology
Correct Answer: Pathophysiology
Rationale: Pathophysiology examines how physiological processes are altered by
disease, bridging basic science and clinical practice. Etiology refers to cause,
pathogenesis describes disease development, and epidemiology studies disease
distribution in populations. This foundational concept underpins all subsequent
pharmacology content.
2. What is the primary function of pharmacokinetics in clinical practice?
A) Determining the mechanism of drug action at receptors
B) Describing what the body does to a drug over time
C) Evaluating the therapeutic index of medications
D) Assessing patient adherence to prescribed regimens
Correct Answer: Describing what the body does to a drug over time
Rationale: Pharmacokinetics encompasses absorption, distribution, metabolism, and
excretion (ADME), describing how the body processes a drug. Pharmacodynamics
addresses drug effects at receptors. Understanding ADME is essential for selecting
appropriate doses and dosing intervals in advanced practice.
3. Which factor most significantly affects drug absorption in a patient with delayed
gastric emptying?
A) Increased first-pass metabolism
B) Delayed onset of therapeutic effect
C) Enhanced bioavailability of all drugs
D) Reduced renal clearance of metabolites
Correct Answer: Delayed onset of therapeutic effect
Rationale: Delayed gastric emptying slows the transit of orally administered drugs to the
small intestine, the primary site of absorption, thereby delaying therapeutic onset. First-
pass metabolism occurs after absorption, and renal clearance involves elimination
rather than absorption. Recognizing this helps predict clinical response timing.
, 4. A drug with a narrow therapeutic index requires what specific monitoring
approach?
A) Routine administration without serum level monitoring
B) Therapeutic drug monitoring to prevent toxicity
C) Fixed dosing regardless of patient factors
D) Avoidance in all clinical situations
Correct Answer: Therapeutic drug monitoring to prevent toxicity
Rationale: Narrow therapeutic index drugs have small differences between effective and
toxic concentrations. Therapeutic drug monitoring ensures levels remain within the
therapeutic window, minimizing toxicity risk. Drugs like digoxin and phenytoin exemplify
agents requiring this approach in advanced practice.
5. Which statement best explains the concept of a prodrug?
A) A drug that is pharmacologically active as administered
B) A drug requiring metabolic activation to exert effects
C) A drug that bypasses first-pass hepatic metabolism
D) A drug with no measurable therapeutic effect
Correct Answer: A drug requiring metabolic activation to exert effects
Rationale: Prodrugs are inactive compounds converted to active metabolites through
enzymatic processes, often during hepatic metabolism. Enalapril is converted to
enalaprilat, and clopidogrel requires CYP2C19 activation. This concept explains
interpatient variability in response to certain medications.
6. How does protein binding affect drug distribution in the body?
A) Increases the volume of distribution significantly
B) Restricts distribution by trapping drug in plasma
C) Enhances drug penetration across the blood-brain barrier
D) Accelerates renal elimination of the drug
Correct Answer: Restricts distribution by trapping drug in plasma
Rationale: Only unbound (free) drug can cross membranes and distribute to tissues.
Highly protein-bound drugs remain largely in the vascular compartment, reducing
volume of distribution. Hypoalbuminemia increases free drug concentration, potentially
causing toxicity at standard doses.
7. What is the primary role of the blood-brain barrier in pharmacology?
A) Actively transporting drugs into the central nervous system
B) Metabolizing drugs within the brain parenchyma
C) Limiting entry of many drugs into the central nervous system
D) Producing cerebrospinal fluid for drug distribution
,Correct Answer: Limiting entry of many drugs into the central nervous system
Rationale: The blood-brain barrier comprises tight junctions and efflux transporters that
restrict passage of many substances from blood into brain tissue. P-glycoprotein
actively pumps drugs out of the brain. This barrier is critical when selecting CNS-active
medications and designing dosing strategies.
8. What role does P-glycoprotein play at the blood-brain barrier?
A) Actively transports drugs into the brain
B) Actively effluxes drugs out of the brain
C) Metabolizes drugs within the brain
D) Produces cerebrospinal fluid
Correct Answer: Actively effluxes drugs out of the brain
Rationale: P-glycoprotein is an ATP-dependent efflux transporter that pumps
substances, including many drugs, out of the brain and back into circulation. Inhibiting
P-gp can increase brain concentrations of substrate drugs. This transporter significantly
influences CNS drug penetration.
9. Which cytochrome P450 enzyme metabolizes the largest percentage of
psychotropic medications?
A) CYP2D6
B) CYP3A4
C) CYP1A2
D) CYP2C19
Correct Answer: CYP3A4
Rationale: CYP3A4 is responsible for metabolizing approximately 50% of all drugs,
including many psychotropic agents. CYP2D6 metabolizes about 25% of medications,
while CYP1A2 and CYP2C19 have narrower substrate profiles. Understanding CYP3A4's
dominance helps predict drug interactions.
10. A patient with impaired renal function would be expected to have what alteration
in drug handling?
A) Decreased drug excretion and increased risk of accumulation
B) Enhanced hepatic metabolism compensating for renal loss
C) Increased volume of distribution for all drugs
D) Reduced absorption of orally administered drugs
Correct Answer: Decreased drug excretion and increased risk of accumulation
Rationale: Impaired renal function reduces clearance of renally eliminated drugs and
active metabolites, increasing accumulation risk and toxicity. Dose adjustments are
, often necessary for drugs like metformin and gabapentin. Monitoring renal function
guides safe prescribing in this population.
11. Which term describes a disease of unknown cause?
A) Iatrogenic
B) Idiopathic
C) Nosocomial
D) Congenital
Correct Answer: Idiopathic
Rationale: Idiopathic disorders arise spontaneously without identifiable cause.
Iatrogenic conditions result from medical intervention, nosocomial infections are
hospital-acquired, and congenital conditions are present at birth. Recognizing these
distinctions informs diagnostic reasoning and treatment planning.
12. What is the most common mechanism of cellular injury resulting from hypoxia?
A) Free radical accumulation
B) ATP depletion
C) Calcium influx
D) Membrane permeability defects
Correct Answer: ATP depletion
Rationale: Hypoxia impairs oxidative phosphorylation, reducing ATP production and
causing ion pump failure, cellular swelling, and eventual death. ATP depletion is the
central mechanism in ischemic injury. Other mechanisms like calcium influx occur
downstream of initial energy failure.
13. Which sequence correctly describes nuclear changes during necrosis?
A) Karyolysis → Karyorrhexis → Pyknosis
B) Pyknosis → Karyorrhexis → Karyolysis
C) Karyorrhexis → Pyknosis → Karyolysis
D) Pyknosis → Karyolysis → Karyorrhexis
Correct Answer: Pyknosis → Karyorrhexis → Karyolysis
Rationale: During necrosis, chromatin first clumps (pyknosis), then the nucleus
fragments (karyorrhexis), and finally the nuclear membrane dissolves (karyolysis). This
ordered progression distinguishes necrosis from apoptosis. Recognizing these changes
aids in understanding tissue injury patterns.
14. Coagulative necrosis is characterized by which feature?
A) Tissue liquefaction with pus formation
B) Preservation of tissue architecture with denatured proteins
Advanced Pharmacology Q&A | Nursing
1. Which term describes the study of functional changes in the body resulting from
disease?
A) Etiology
B) Pathogenesis
C) Pathophysiology
D) Epidemiology
Correct Answer: Pathophysiology
Rationale: Pathophysiology examines how physiological processes are altered by
disease, bridging basic science and clinical practice. Etiology refers to cause,
pathogenesis describes disease development, and epidemiology studies disease
distribution in populations. This foundational concept underpins all subsequent
pharmacology content.
2. What is the primary function of pharmacokinetics in clinical practice?
A) Determining the mechanism of drug action at receptors
B) Describing what the body does to a drug over time
C) Evaluating the therapeutic index of medications
D) Assessing patient adherence to prescribed regimens
Correct Answer: Describing what the body does to a drug over time
Rationale: Pharmacokinetics encompasses absorption, distribution, metabolism, and
excretion (ADME), describing how the body processes a drug. Pharmacodynamics
addresses drug effects at receptors. Understanding ADME is essential for selecting
appropriate doses and dosing intervals in advanced practice.
3. Which factor most significantly affects drug absorption in a patient with delayed
gastric emptying?
A) Increased first-pass metabolism
B) Delayed onset of therapeutic effect
C) Enhanced bioavailability of all drugs
D) Reduced renal clearance of metabolites
Correct Answer: Delayed onset of therapeutic effect
Rationale: Delayed gastric emptying slows the transit of orally administered drugs to the
small intestine, the primary site of absorption, thereby delaying therapeutic onset. First-
pass metabolism occurs after absorption, and renal clearance involves elimination
rather than absorption. Recognizing this helps predict clinical response timing.
, 4. A drug with a narrow therapeutic index requires what specific monitoring
approach?
A) Routine administration without serum level monitoring
B) Therapeutic drug monitoring to prevent toxicity
C) Fixed dosing regardless of patient factors
D) Avoidance in all clinical situations
Correct Answer: Therapeutic drug monitoring to prevent toxicity
Rationale: Narrow therapeutic index drugs have small differences between effective and
toxic concentrations. Therapeutic drug monitoring ensures levels remain within the
therapeutic window, minimizing toxicity risk. Drugs like digoxin and phenytoin exemplify
agents requiring this approach in advanced practice.
5. Which statement best explains the concept of a prodrug?
A) A drug that is pharmacologically active as administered
B) A drug requiring metabolic activation to exert effects
C) A drug that bypasses first-pass hepatic metabolism
D) A drug with no measurable therapeutic effect
Correct Answer: A drug requiring metabolic activation to exert effects
Rationale: Prodrugs are inactive compounds converted to active metabolites through
enzymatic processes, often during hepatic metabolism. Enalapril is converted to
enalaprilat, and clopidogrel requires CYP2C19 activation. This concept explains
interpatient variability in response to certain medications.
6. How does protein binding affect drug distribution in the body?
A) Increases the volume of distribution significantly
B) Restricts distribution by trapping drug in plasma
C) Enhances drug penetration across the blood-brain barrier
D) Accelerates renal elimination of the drug
Correct Answer: Restricts distribution by trapping drug in plasma
Rationale: Only unbound (free) drug can cross membranes and distribute to tissues.
Highly protein-bound drugs remain largely in the vascular compartment, reducing
volume of distribution. Hypoalbuminemia increases free drug concentration, potentially
causing toxicity at standard doses.
7. What is the primary role of the blood-brain barrier in pharmacology?
A) Actively transporting drugs into the central nervous system
B) Metabolizing drugs within the brain parenchyma
C) Limiting entry of many drugs into the central nervous system
D) Producing cerebrospinal fluid for drug distribution
,Correct Answer: Limiting entry of many drugs into the central nervous system
Rationale: The blood-brain barrier comprises tight junctions and efflux transporters that
restrict passage of many substances from blood into brain tissue. P-glycoprotein
actively pumps drugs out of the brain. This barrier is critical when selecting CNS-active
medications and designing dosing strategies.
8. What role does P-glycoprotein play at the blood-brain barrier?
A) Actively transports drugs into the brain
B) Actively effluxes drugs out of the brain
C) Metabolizes drugs within the brain
D) Produces cerebrospinal fluid
Correct Answer: Actively effluxes drugs out of the brain
Rationale: P-glycoprotein is an ATP-dependent efflux transporter that pumps
substances, including many drugs, out of the brain and back into circulation. Inhibiting
P-gp can increase brain concentrations of substrate drugs. This transporter significantly
influences CNS drug penetration.
9. Which cytochrome P450 enzyme metabolizes the largest percentage of
psychotropic medications?
A) CYP2D6
B) CYP3A4
C) CYP1A2
D) CYP2C19
Correct Answer: CYP3A4
Rationale: CYP3A4 is responsible for metabolizing approximately 50% of all drugs,
including many psychotropic agents. CYP2D6 metabolizes about 25% of medications,
while CYP1A2 and CYP2C19 have narrower substrate profiles. Understanding CYP3A4's
dominance helps predict drug interactions.
10. A patient with impaired renal function would be expected to have what alteration
in drug handling?
A) Decreased drug excretion and increased risk of accumulation
B) Enhanced hepatic metabolism compensating for renal loss
C) Increased volume of distribution for all drugs
D) Reduced absorption of orally administered drugs
Correct Answer: Decreased drug excretion and increased risk of accumulation
Rationale: Impaired renal function reduces clearance of renally eliminated drugs and
active metabolites, increasing accumulation risk and toxicity. Dose adjustments are
, often necessary for drugs like metformin and gabapentin. Monitoring renal function
guides safe prescribing in this population.
11. Which term describes a disease of unknown cause?
A) Iatrogenic
B) Idiopathic
C) Nosocomial
D) Congenital
Correct Answer: Idiopathic
Rationale: Idiopathic disorders arise spontaneously without identifiable cause.
Iatrogenic conditions result from medical intervention, nosocomial infections are
hospital-acquired, and congenital conditions are present at birth. Recognizing these
distinctions informs diagnostic reasoning and treatment planning.
12. What is the most common mechanism of cellular injury resulting from hypoxia?
A) Free radical accumulation
B) ATP depletion
C) Calcium influx
D) Membrane permeability defects
Correct Answer: ATP depletion
Rationale: Hypoxia impairs oxidative phosphorylation, reducing ATP production and
causing ion pump failure, cellular swelling, and eventual death. ATP depletion is the
central mechanism in ischemic injury. Other mechanisms like calcium influx occur
downstream of initial energy failure.
13. Which sequence correctly describes nuclear changes during necrosis?
A) Karyolysis → Karyorrhexis → Pyknosis
B) Pyknosis → Karyorrhexis → Karyolysis
C) Karyorrhexis → Pyknosis → Karyolysis
D) Pyknosis → Karyolysis → Karyorrhexis
Correct Answer: Pyknosis → Karyorrhexis → Karyolysis
Rationale: During necrosis, chromatin first clumps (pyknosis), then the nucleus
fragments (karyorrhexis), and finally the nuclear membrane dissolves (karyolysis). This
ordered progression distinguishes necrosis from apoptosis. Recognizing these changes
aids in understanding tissue injury patterns.
14. Coagulative necrosis is characterized by which feature?
A) Tissue liquefaction with pus formation
B) Preservation of tissue architecture with denatured proteins
