BIOL 351 | BIOL351 Module 3: Pharmacology
Updated and Latest Questions and Correct
Answers with Rationale - Portage Learning
1. A patient with heart failure is prescribed Lisinopril. Which mechanism of action best
describes this medication?
A. Directly blocks the binding of Angiotensin II to its receptor
B. Decreases the force of myocardial contraction by blocking calcium channels
C. Inhibits the enzyme responsible for converting Angiotensin I to Angiotensin II
D. Increases the excretion of sodium and water in the distal tubule
Correct Answer: C
Explanation: Lisinopril belongs to the ACE inhibitor class of medications. It works by
inhibiting the angiotensin-converting enzyme which prevents the formation of the potent
vasoconstrictor Angiotensin II. This reduction leads to lower peripheral resistance and
decreased afterload on the heart. By decreasing aldosterone secretion, it also helps reduce
fluid volume over time. Patients must be monitored for a dry cough caused by increased
bradykinin levels.
2. A client is taking Spironolactone for management of heart failure. Which laboratory value
requires the most immediate attention?
A. Sodium level of 136 mEq/L
B. Potassium level of 5.8 mEq/L
C. Glucose level of 110 mg/dL
D. Calcium level of 9.2 mg/dL
Correct Answer: B
Explanation: Spironolactone is a potassium-sparing diuretic that acts as an aldosterone
antagonist in the distal tubule. Unlike loop diuretics, it inhibits the excretion of potassium
while promoting the loss of sodium. A potassium level of 5.8 mEq/L indicates
hyperkalemia, which can lead to life-threatening cardiac arrhythmias. Nurses must educate
patients to avoid salt substitutes that contain potassium. Routine monitoring of renal
function and electrolytes is essential during therapy.
3. Which adverse effect is a patient most likely to experience when starting a therapy of
Nifedipine?
A. Dry hacking cough
B. Hyperkalemia
,C. Peripheral edema
D. Hypoglycemia
Correct Answer: C
Explanation: Nifedipine is a dihydropyridine calcium channel blocker primarily used for
hypertension. It causes significant vasodilation of peripheral arterioles, which can lead to
fluid leakage into the interstitial space. This result often manifests as swelling in the ankles
or feet, known as peripheral edema. It does not typically cause the dry cough associated
with ACE inhibitors. Monitoring blood pressure and assessing for signs of fluid overload
are standard nursing interventions.
4. A patient is diagnosed with atrial fibrillation and prescribed Amiodarone. What is the
primary mechanism of this Class III antiarrhythmic?
A. Blocking sodium channels to slow conduction velocity
B. Antagonizing beta-adrenergic receptors to reduce heart rate
C. Blocking potassium channels to prolong the action potential duration
D. Blocking calcium channels to slow the SA node discharge
Correct Answer: C
Explanation: Amiodarone is a Class III antiarrhythmic drug used to treat various
ventricular and supraventricular arrhythmias. Its primary effect is the blockade of
potassium channels, which delays repolarization and increases the refractory period. This
action helps to stabilize the cardiac rhythm and prevent re-entry circuits. However, it is a
complex drug that also possesses some properties of Classes I, II, and IV. Long-term use
requires careful monitoring of pulmonary, thyroid, and liver functions due to potential
toxicity.
5. A patient taking Digoxin for heart failure reports seeing yellow-green halos around lights.
What should the nurse suspect?
A. Normal therapeutic effect of the drug
B. Development of glaucoma
C. Allergic reaction to the medication
D. Digoxin toxicity
Correct Answer: D
Explanation: Digoxin toxicity is a serious condition that can occur due to the drug’s
narrow therapeutic index. Visual disturbances, such as seeing yellow or green halos, are
classic early signs of overdose. Other symptoms include nausea, vomiting, and various
cardiac arrhythmias. Hypokalemia significantly increases the risk of toxicity because
, potassium and digoxin compete for the same binding site. The nurse should check the
patient’s serum digoxin level and electrolyte balance immediately.
6. What is the rationale for using a Beta-Blocker in the management of stable angina?
A. To increase the heart rate and improve cardiac output
B. To cause coronary artery vasodilation directly
C. To prevent the formation of blood clots in the coronary arteries
D. To decrease myocardial oxygen demand by reducing heart rate and contractility
Correct Answer: D
Explanation: Beta-blockers like Metoprolol are mainstay treatments for chronic stable
angina. They work by antagonizing beta-1 receptors in the heart, leading to a slower heart
rate and reduced force of contraction. This reduction in cardiac workload directly lowers
the amount of oxygen the heart muscle requires. By extending diastole, they also allow
more time for coronary artery perfusion. Patients should be cautioned not to stop these
medications abruptly to avoid rebound tachycardia.
7. Which medication is considered a first-line treatment for a patient with hypertension and a
history of diabetes?
A. Propranolol
B. Enalapril
C. Amlodipine
D. Hydralazine
Correct Answer: B
Explanation: ACE inhibitors like Enalapril are preferred for hypertensive patients with
diabetes. These drugs provide a renoprotective effect by decreasing pressure within the
glomerulus. They help delay the progression of diabetic nephropathy over time. While
other antihypertensives can lower blood pressure, ACE inhibitors offer the most benefit for
renal preservation in this population. Patients should be monitored for serum creatinine
changes when starting the medication.
8. A patient with a history of asthma requires a beta-blocker for hypertension. Which drug is
the safest choice?
A. Propranolol
B. Nadolol
C. Metoprolol
D. Timolol
Updated and Latest Questions and Correct
Answers with Rationale - Portage Learning
1. A patient with heart failure is prescribed Lisinopril. Which mechanism of action best
describes this medication?
A. Directly blocks the binding of Angiotensin II to its receptor
B. Decreases the force of myocardial contraction by blocking calcium channels
C. Inhibits the enzyme responsible for converting Angiotensin I to Angiotensin II
D. Increases the excretion of sodium and water in the distal tubule
Correct Answer: C
Explanation: Lisinopril belongs to the ACE inhibitor class of medications. It works by
inhibiting the angiotensin-converting enzyme which prevents the formation of the potent
vasoconstrictor Angiotensin II. This reduction leads to lower peripheral resistance and
decreased afterload on the heart. By decreasing aldosterone secretion, it also helps reduce
fluid volume over time. Patients must be monitored for a dry cough caused by increased
bradykinin levels.
2. A client is taking Spironolactone for management of heart failure. Which laboratory value
requires the most immediate attention?
A. Sodium level of 136 mEq/L
B. Potassium level of 5.8 mEq/L
C. Glucose level of 110 mg/dL
D. Calcium level of 9.2 mg/dL
Correct Answer: B
Explanation: Spironolactone is a potassium-sparing diuretic that acts as an aldosterone
antagonist in the distal tubule. Unlike loop diuretics, it inhibits the excretion of potassium
while promoting the loss of sodium. A potassium level of 5.8 mEq/L indicates
hyperkalemia, which can lead to life-threatening cardiac arrhythmias. Nurses must educate
patients to avoid salt substitutes that contain potassium. Routine monitoring of renal
function and electrolytes is essential during therapy.
3. Which adverse effect is a patient most likely to experience when starting a therapy of
Nifedipine?
A. Dry hacking cough
B. Hyperkalemia
,C. Peripheral edema
D. Hypoglycemia
Correct Answer: C
Explanation: Nifedipine is a dihydropyridine calcium channel blocker primarily used for
hypertension. It causes significant vasodilation of peripheral arterioles, which can lead to
fluid leakage into the interstitial space. This result often manifests as swelling in the ankles
or feet, known as peripheral edema. It does not typically cause the dry cough associated
with ACE inhibitors. Monitoring blood pressure and assessing for signs of fluid overload
are standard nursing interventions.
4. A patient is diagnosed with atrial fibrillation and prescribed Amiodarone. What is the
primary mechanism of this Class III antiarrhythmic?
A. Blocking sodium channels to slow conduction velocity
B. Antagonizing beta-adrenergic receptors to reduce heart rate
C. Blocking potassium channels to prolong the action potential duration
D. Blocking calcium channels to slow the SA node discharge
Correct Answer: C
Explanation: Amiodarone is a Class III antiarrhythmic drug used to treat various
ventricular and supraventricular arrhythmias. Its primary effect is the blockade of
potassium channels, which delays repolarization and increases the refractory period. This
action helps to stabilize the cardiac rhythm and prevent re-entry circuits. However, it is a
complex drug that also possesses some properties of Classes I, II, and IV. Long-term use
requires careful monitoring of pulmonary, thyroid, and liver functions due to potential
toxicity.
5. A patient taking Digoxin for heart failure reports seeing yellow-green halos around lights.
What should the nurse suspect?
A. Normal therapeutic effect of the drug
B. Development of glaucoma
C. Allergic reaction to the medication
D. Digoxin toxicity
Correct Answer: D
Explanation: Digoxin toxicity is a serious condition that can occur due to the drug’s
narrow therapeutic index. Visual disturbances, such as seeing yellow or green halos, are
classic early signs of overdose. Other symptoms include nausea, vomiting, and various
cardiac arrhythmias. Hypokalemia significantly increases the risk of toxicity because
, potassium and digoxin compete for the same binding site. The nurse should check the
patient’s serum digoxin level and electrolyte balance immediately.
6. What is the rationale for using a Beta-Blocker in the management of stable angina?
A. To increase the heart rate and improve cardiac output
B. To cause coronary artery vasodilation directly
C. To prevent the formation of blood clots in the coronary arteries
D. To decrease myocardial oxygen demand by reducing heart rate and contractility
Correct Answer: D
Explanation: Beta-blockers like Metoprolol are mainstay treatments for chronic stable
angina. They work by antagonizing beta-1 receptors in the heart, leading to a slower heart
rate and reduced force of contraction. This reduction in cardiac workload directly lowers
the amount of oxygen the heart muscle requires. By extending diastole, they also allow
more time for coronary artery perfusion. Patients should be cautioned not to stop these
medications abruptly to avoid rebound tachycardia.
7. Which medication is considered a first-line treatment for a patient with hypertension and a
history of diabetes?
A. Propranolol
B. Enalapril
C. Amlodipine
D. Hydralazine
Correct Answer: B
Explanation: ACE inhibitors like Enalapril are preferred for hypertensive patients with
diabetes. These drugs provide a renoprotective effect by decreasing pressure within the
glomerulus. They help delay the progression of diabetic nephropathy over time. While
other antihypertensives can lower blood pressure, ACE inhibitors offer the most benefit for
renal preservation in this population. Patients should be monitored for serum creatinine
changes when starting the medication.
8. A patient with a history of asthma requires a beta-blocker for hypertension. Which drug is
the safest choice?
A. Propranolol
B. Nadolol
C. Metoprolol
D. Timolol
