WGU D116 FOUNDATIONS IN NURSING — UNIT 2
ACTUAL EXAM WITH COMPLETE QUESTIONS AND
CORRECT DETAILED ANSWERS
(100% VERIFIED ANSWERS) | ALREADY GRADED
A+ | || PROFESSOR VERIFIED || || BRAND NEW!!! ||
2026!!!!
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A patient is prescribed a drug with a narrow therapeutic range. Which
nursing action is MOST important when administering this
medication?
A. Educate the patient on dietary restrictions associated with the drug
B. Administer the drug on an empty stomach to improve absorption
C. Monitor plasma drug levels closely and report abnormal values
D. Withhold the medication if the patient reports any side effects
✔ CORRECT ANSWER: C. Monitor plasma drug levels closely and
report abnormal values
📘 RATIONALE: Drugs with a narrow therapeutic range have a very small
difference between the minimum effective concentration (MEC) and the
toxic concentration. This means even small changes in drug levels can lead
,to therapeutic failure or toxicity. The nurse's most critical responsibility is
to monitor plasma drug levels regularly to ensure the drug remains within
the therapeutic window. Simply educating the patient or withholding based
on reported side effects is insufficient without objective lab data.
Administering on an empty stomach alters absorption and could push levels
into toxic range.
A patient receiving IV gentamicin develops toxic serum levels despite
correct dosing and previous tolerance. Which explanation BEST
accounts for this finding?
A. The patient has developed resistance to gentamicin over time
B. Gentamicin has been incorrectly stored, increasing its potency
C. A concurrently administered drug is displacing gentamicin from
albumin binding sites
D. The patient's renal function has dramatically improved, retaining the
drug
✔ CORRECT ANSWER: C. A concurrently administered drug is
displacing gentamicin from albumin binding sites
📘 RATIONALE: Gentamicin binds weakly to serum albumin. When
another drug that has a higher affinity for albumin is introduced
concurrently, it can displace gentamicin from its binding sites, increasing
the free (active) fraction of gentamicin in the bloodstream. This rise in free
drug concentration can push levels into the toxic range even when dosing is
accurate and previously tolerated. Resistance does not manifest as sudden
toxicity, and improved renal function would actually lower, not raise, drug
,levels. Storage errors would more likely reduce efficacy rather than
increase potency.
Which term BEST describes the pharmacokinetic process by which a
drug travels from the site of administration into the systemic
circulation?
A. Distribution
B. Metabolism
C. Absorption
D. Excretion
✔ CORRECT ANSWER: C. Absorption
📘 RATIONALE: Pharmacokinetics encompasses four processes:
absorption, distribution, metabolism (biotransformation), and excretion —
often remembered by the acronym ADME. Absorption specifically refers to
the movement of a drug from its site of administration into the
bloodstream. Distribution refers to how the drug spreads throughout body
compartments once it is in circulation. Metabolism involves enzymatic
transformation of the drug, and excretion is the elimination of the drug and
its metabolites from the body. Understanding each component is essential
for predicting drug onset, duration, and elimination.
A nurse is reviewing a patient's medication. As plasma drug
concentration increases, the volume of distribution (Vd) is expected to
do which of the following?
A. Increase proportionally with concentration
B. Remain unchanged regardless of concentration
, C. Decrease as more drug is retained in plasma
D. Double at toxic concentration levels
✔ CORRECT ANSWER: C. Decrease as more drug is retained in plasma
📘 RATIONALE: Volume of distribution (Vd) is a pharmacokinetic
parameter that describes the apparent space in the body available to
contain the drug. As plasma drug concentration rises, the Vd decreases
because a larger proportion of the drug remains in the bloodstream rather
than distributing to peripheral tissues. This inverse relationship is
important because it affects dosing calculations and the drug's therapeutic
and toxic potential. A low Vd suggests the drug stays mainly in the
bloodstream, while a high Vd indicates widespread tissue distribution.
A patient reports that their pain medication no longer works as
effectively as it did when first prescribed, despite taking the same
dose. What is the MOST likely pharmacodynamic explanation?
A. The patient has developed a pharmacokinetic tolerance causing
rapid excretion
B. The patient is experiencing placebo reversal
C. Continual receptor exposure has led to desensitization of receptor
sites
D. The drug's half-life has shortened due to enzyme induction
✔ CORRECT ANSWER: C. Continual receptor exposure has led to
desensitization of receptor sites
📘 RATIONALE: Pharmacodynamic tolerance occurs when continued
exposure to an agonist drug causes the body to compensate by reducing the
ACTUAL EXAM WITH COMPLETE QUESTIONS AND
CORRECT DETAILED ANSWERS
(100% VERIFIED ANSWERS) | ALREADY GRADED
A+ | || PROFESSOR VERIFIED || || BRAND NEW!!! ||
2026!!!!
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
━━━━━━━━━━━━━━━━
A patient is prescribed a drug with a narrow therapeutic range. Which
nursing action is MOST important when administering this
medication?
A. Educate the patient on dietary restrictions associated with the drug
B. Administer the drug on an empty stomach to improve absorption
C. Monitor plasma drug levels closely and report abnormal values
D. Withhold the medication if the patient reports any side effects
✔ CORRECT ANSWER: C. Monitor plasma drug levels closely and
report abnormal values
📘 RATIONALE: Drugs with a narrow therapeutic range have a very small
difference between the minimum effective concentration (MEC) and the
toxic concentration. This means even small changes in drug levels can lead
,to therapeutic failure or toxicity. The nurse's most critical responsibility is
to monitor plasma drug levels regularly to ensure the drug remains within
the therapeutic window. Simply educating the patient or withholding based
on reported side effects is insufficient without objective lab data.
Administering on an empty stomach alters absorption and could push levels
into toxic range.
A patient receiving IV gentamicin develops toxic serum levels despite
correct dosing and previous tolerance. Which explanation BEST
accounts for this finding?
A. The patient has developed resistance to gentamicin over time
B. Gentamicin has been incorrectly stored, increasing its potency
C. A concurrently administered drug is displacing gentamicin from
albumin binding sites
D. The patient's renal function has dramatically improved, retaining the
drug
✔ CORRECT ANSWER: C. A concurrently administered drug is
displacing gentamicin from albumin binding sites
📘 RATIONALE: Gentamicin binds weakly to serum albumin. When
another drug that has a higher affinity for albumin is introduced
concurrently, it can displace gentamicin from its binding sites, increasing
the free (active) fraction of gentamicin in the bloodstream. This rise in free
drug concentration can push levels into the toxic range even when dosing is
accurate and previously tolerated. Resistance does not manifest as sudden
toxicity, and improved renal function would actually lower, not raise, drug
,levels. Storage errors would more likely reduce efficacy rather than
increase potency.
Which term BEST describes the pharmacokinetic process by which a
drug travels from the site of administration into the systemic
circulation?
A. Distribution
B. Metabolism
C. Absorption
D. Excretion
✔ CORRECT ANSWER: C. Absorption
📘 RATIONALE: Pharmacokinetics encompasses four processes:
absorption, distribution, metabolism (biotransformation), and excretion —
often remembered by the acronym ADME. Absorption specifically refers to
the movement of a drug from its site of administration into the
bloodstream. Distribution refers to how the drug spreads throughout body
compartments once it is in circulation. Metabolism involves enzymatic
transformation of the drug, and excretion is the elimination of the drug and
its metabolites from the body. Understanding each component is essential
for predicting drug onset, duration, and elimination.
A nurse is reviewing a patient's medication. As plasma drug
concentration increases, the volume of distribution (Vd) is expected to
do which of the following?
A. Increase proportionally with concentration
B. Remain unchanged regardless of concentration
, C. Decrease as more drug is retained in plasma
D. Double at toxic concentration levels
✔ CORRECT ANSWER: C. Decrease as more drug is retained in plasma
📘 RATIONALE: Volume of distribution (Vd) is a pharmacokinetic
parameter that describes the apparent space in the body available to
contain the drug. As plasma drug concentration rises, the Vd decreases
because a larger proportion of the drug remains in the bloodstream rather
than distributing to peripheral tissues. This inverse relationship is
important because it affects dosing calculations and the drug's therapeutic
and toxic potential. A low Vd suggests the drug stays mainly in the
bloodstream, while a high Vd indicates widespread tissue distribution.
A patient reports that their pain medication no longer works as
effectively as it did when first prescribed, despite taking the same
dose. What is the MOST likely pharmacodynamic explanation?
A. The patient has developed a pharmacokinetic tolerance causing
rapid excretion
B. The patient is experiencing placebo reversal
C. Continual receptor exposure has led to desensitization of receptor
sites
D. The drug's half-life has shortened due to enzyme induction
✔ CORRECT ANSWER: C. Continual receptor exposure has led to
desensitization of receptor sites
📘 RATIONALE: Pharmacodynamic tolerance occurs when continued
exposure to an agonist drug causes the body to compensate by reducing the
