WGU D027 Advanced Patho pharmacological
Foundations Questions and Correct Answers
(Verified Answers) Plus Rationale 2027 Q&A|
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1. A patient with chronic heart failure is prescribed an angiotensin-
converting enzyme (ACE) inhibitor. Which mechanism best
explains the therapeutic effect of this medication?
a. Direct stimulation of β1-adrenergic receptors
b. Increased conversion of angiotensin I to angiotensin II
c. Decreased formation of angiotensin II and reduced aldosterone
secretion
d. Increased sodium reabsorption in the distal nephron
Rationale: ACE inhibitors reduce the conversion of angiotensin I to
angiotensin II. Lower angiotensin II decreases vasoconstriction and
aldosterone release, which reduces systemic vascular resistance and
sodium and water retention. These effects decrease cardiac workload
and improve outcomes in many patients with heart failure.
, 2. A patient taking lisinopril develops a persistent dry cough. Which
mechanism is most responsible for this adverse effect?
a. Increased aldosterone activity
b. Excessive β2-receptor stimulation
c. Accumulation of bradykinin
d. Increased histamine degradation
Rationale: ACE normally contributes to the breakdown of bradykinin.
ACE inhibition can therefore increase bradykinin concentrations, which
may stimulate airway sensory pathways and cause a persistent dry
cough. This adverse effect is characteristic of ACE inhibitors.
3. Which medication class is generally preferred when an ACE
inhibitor causes an intolerable cough but renin-angiotensin
system blockade remains indicated?
a. Calcium channel blocker
b. Thiazide diuretic
c. Angiotensin II receptor blocker (ARB)
d. α1-adrenergic agonist
Rationale: ARBs block the angiotensin II receptor rather than inhibiting
ACE. Because they do not substantially increase bradykinin, cough is less
common. ARBs can provide similar renin-angiotensin system effects in
appropriate patients.
, 4. A patient taking spironolactone for heart failure should be
monitored most closely for which laboratory abnormality?
a. Hypocalcemia
b. Hypernatremia
c. Hyperkalemia
d. Hypoglycemia
Rationale: Spironolactone is an aldosterone antagonist and potassium-
sparing diuretic. Reduced aldosterone activity decreases sodium
reabsorption while decreasing potassium excretion. Consequently,
serum potassium can rise, particularly in patients with renal impairment
or when combined with other medications that increase potassium.
5. Which finding is most consistent with hypothyroidism?
a. Tachycardia and heat intolerance
b. Tremor and weight loss
c. Bradycardia and cold intolerance
d. Increased bowel frequency and diaphoresis
Rationale: Reduced thyroid hormone activity decreases metabolic
activity. Patients may experience fatigue, weight gain, constipation,
cold intolerance, dry skin, and bradycardia. Hyperthyroidism produces
the opposite pattern, including heat intolerance and tachycardia.
, 6. A patient with primary hypothyroidism is prescribed
levothyroxine. What is the primary therapeutic goal?
a. Suppress thyroid-stimulating hormone permanently
b. Block thyroid hormone receptors
c. Replace deficient thyroid hormone
d. Stimulate thyroid antibody production
Rationale: Levothyroxine is synthetic thyroxine (T4) and is used as
thyroid hormone replacement. Peripheral tissues convert T4 to the
active hormone T3. Appropriate replacement restores physiologic
thyroid hormone activity and generally normalizes elevated TSH in
primary hypothyroidism.
7. Which finding may indicate excessive levothyroxine replacement?
a. Severe constipation
b. Cold intolerance
c. Palpitations and tremor
d. Bradycardia
Rationale: Excess thyroid hormone produces effects resembling
hyperthyroidism. Patients may develop tachycardia, palpitations,
tremor, nervousness, heat intolerance, and insomnia. Persistent
excessive replacement can also increase the risk of cardiac
complications and bone loss.
Foundations Questions and Correct Answers
(Verified Answers) Plus Rationale 2027 Q&A|
Instant Download Pdf
1. A patient with chronic heart failure is prescribed an angiotensin-
converting enzyme (ACE) inhibitor. Which mechanism best
explains the therapeutic effect of this medication?
a. Direct stimulation of β1-adrenergic receptors
b. Increased conversion of angiotensin I to angiotensin II
c. Decreased formation of angiotensin II and reduced aldosterone
secretion
d. Increased sodium reabsorption in the distal nephron
Rationale: ACE inhibitors reduce the conversion of angiotensin I to
angiotensin II. Lower angiotensin II decreases vasoconstriction and
aldosterone release, which reduces systemic vascular resistance and
sodium and water retention. These effects decrease cardiac workload
and improve outcomes in many patients with heart failure.
, 2. A patient taking lisinopril develops a persistent dry cough. Which
mechanism is most responsible for this adverse effect?
a. Increased aldosterone activity
b. Excessive β2-receptor stimulation
c. Accumulation of bradykinin
d. Increased histamine degradation
Rationale: ACE normally contributes to the breakdown of bradykinin.
ACE inhibition can therefore increase bradykinin concentrations, which
may stimulate airway sensory pathways and cause a persistent dry
cough. This adverse effect is characteristic of ACE inhibitors.
3. Which medication class is generally preferred when an ACE
inhibitor causes an intolerable cough but renin-angiotensin
system blockade remains indicated?
a. Calcium channel blocker
b. Thiazide diuretic
c. Angiotensin II receptor blocker (ARB)
d. α1-adrenergic agonist
Rationale: ARBs block the angiotensin II receptor rather than inhibiting
ACE. Because they do not substantially increase bradykinin, cough is less
common. ARBs can provide similar renin-angiotensin system effects in
appropriate patients.
, 4. A patient taking spironolactone for heart failure should be
monitored most closely for which laboratory abnormality?
a. Hypocalcemia
b. Hypernatremia
c. Hyperkalemia
d. Hypoglycemia
Rationale: Spironolactone is an aldosterone antagonist and potassium-
sparing diuretic. Reduced aldosterone activity decreases sodium
reabsorption while decreasing potassium excretion. Consequently,
serum potassium can rise, particularly in patients with renal impairment
or when combined with other medications that increase potassium.
5. Which finding is most consistent with hypothyroidism?
a. Tachycardia and heat intolerance
b. Tremor and weight loss
c. Bradycardia and cold intolerance
d. Increased bowel frequency and diaphoresis
Rationale: Reduced thyroid hormone activity decreases metabolic
activity. Patients may experience fatigue, weight gain, constipation,
cold intolerance, dry skin, and bradycardia. Hyperthyroidism produces
the opposite pattern, including heat intolerance and tachycardia.
, 6. A patient with primary hypothyroidism is prescribed
levothyroxine. What is the primary therapeutic goal?
a. Suppress thyroid-stimulating hormone permanently
b. Block thyroid hormone receptors
c. Replace deficient thyroid hormone
d. Stimulate thyroid antibody production
Rationale: Levothyroxine is synthetic thyroxine (T4) and is used as
thyroid hormone replacement. Peripheral tissues convert T4 to the
active hormone T3. Appropriate replacement restores physiologic
thyroid hormone activity and generally normalizes elevated TSH in
primary hypothyroidism.
7. Which finding may indicate excessive levothyroxine replacement?
a. Severe constipation
b. Cold intolerance
c. Palpitations and tremor
d. Bradycardia
Rationale: Excess thyroid hormone produces effects resembling
hyperthyroidism. Patients may develop tachycardia, palpitations,
tremor, nervousness, heat intolerance, and insomnia. Persistent
excessive replacement can also increase the risk of cardiac
complications and bone loss.
