WGU D116 ADVANCED
PHARMACOLOGY FINAL EXAM PRE-
ASSESSMENT QUESTIONS AND
ANSWERS
1. A patient is prescribed a drug with a high volume of distribution (Vd). What does this
imply about the drug’s properties?
A. The drug is highly protein-bound in the plasma.
B. The drug will have a very short half-life.
C. The drug is hydrophilic and remains in the intravascular space.
D. The drug is likely lipophilic and penetrates tissues extensively.
Answer: D
Conceptual Explanation: A high Volume of Distribution (Vd) suggests that the drug is
distributed widely into tissues rather than staying in the plasma, often because it is
lipophilic.
2. Which cytochrome P450 enzyme is responsible for the metabolism of approximately 50%
of all clinically used drugs?
A. CYP2D6
B. CYP2C19
C. CYP1A2
,D. CYP3A4
Answer: D
Conceptual Explanation: CYP3A4 is the most abundant CYP enzyme in the liver and is
involved in the metabolism of about half of all prescribed medications.
3. A patient with a history of asthma is diagnosed with hypertension. Which class of
antihypertensives should be avoided?
A. Calcium Channel Blockers
B. ACE Inhibitors
C. Non-selective Beta-blockers
D. Thiazide Diuretics
Answer: C
Conceptual Explanation: Non-selective beta-blockers (like propranolol) block Beta-2
receptors in the lungs, which can cause bronchoconstriction and exacerbate asthma.
4. What is the primary mechanism of action of ACE inhibitors in treating heart failure?
A. Increasing myocardial contractility
B. Decreasing heart rate by blocking SA node signals
C. Reducing preload and afterload by inhibiting Angiotensin II production
D. Increasing sodium reabsorption in the distal tubule
, Answer: C
Conceptual Explanation: ACE inhibitors block the conversion of Angiotensin I to
Angiotensin II, leading to vasodilation (reduced afterload) and decreased aldosterone
(reduced preload/sodium retention).
5. Which of the following describes ‘First-Pass Metabolism’?
A. The initial excretion of drugs through the kidneys.
B. The rapid inactivation of an oral drug by the liver before it reaches systemic circulation.
C. The binding of drugs to albumin in the bloodstream.
D. The process of a drug crossing the blood-brain barrier.
Answer: B
Conceptual Explanation: First-pass metabolism refers to the metabolism of a drug in the
liver or gut wall after oral administration, reducing the concentration that reaches the
systemic circulation.
6. A patient is taking Warfarin and is started on Amiodarone. What is the expected
interaction?
A. Amiodarone inhibits CYP enzymes, increasing Warfarin levels and INR.
B. Amiodarone induces CYP enzymes, decreasing Warfarin levels.
C. Amiodarone increases Vitamin K synthesis in the gut.
D. There is no significant interaction between these drugs.
PHARMACOLOGY FINAL EXAM PRE-
ASSESSMENT QUESTIONS AND
ANSWERS
1. A patient is prescribed a drug with a high volume of distribution (Vd). What does this
imply about the drug’s properties?
A. The drug is highly protein-bound in the plasma.
B. The drug will have a very short half-life.
C. The drug is hydrophilic and remains in the intravascular space.
D. The drug is likely lipophilic and penetrates tissues extensively.
Answer: D
Conceptual Explanation: A high Volume of Distribution (Vd) suggests that the drug is
distributed widely into tissues rather than staying in the plasma, often because it is
lipophilic.
2. Which cytochrome P450 enzyme is responsible for the metabolism of approximately 50%
of all clinically used drugs?
A. CYP2D6
B. CYP2C19
C. CYP1A2
,D. CYP3A4
Answer: D
Conceptual Explanation: CYP3A4 is the most abundant CYP enzyme in the liver and is
involved in the metabolism of about half of all prescribed medications.
3. A patient with a history of asthma is diagnosed with hypertension. Which class of
antihypertensives should be avoided?
A. Calcium Channel Blockers
B. ACE Inhibitors
C. Non-selective Beta-blockers
D. Thiazide Diuretics
Answer: C
Conceptual Explanation: Non-selective beta-blockers (like propranolol) block Beta-2
receptors in the lungs, which can cause bronchoconstriction and exacerbate asthma.
4. What is the primary mechanism of action of ACE inhibitors in treating heart failure?
A. Increasing myocardial contractility
B. Decreasing heart rate by blocking SA node signals
C. Reducing preload and afterload by inhibiting Angiotensin II production
D. Increasing sodium reabsorption in the distal tubule
, Answer: C
Conceptual Explanation: ACE inhibitors block the conversion of Angiotensin I to
Angiotensin II, leading to vasodilation (reduced afterload) and decreased aldosterone
(reduced preload/sodium retention).
5. Which of the following describes ‘First-Pass Metabolism’?
A. The initial excretion of drugs through the kidneys.
B. The rapid inactivation of an oral drug by the liver before it reaches systemic circulation.
C. The binding of drugs to albumin in the bloodstream.
D. The process of a drug crossing the blood-brain barrier.
Answer: B
Conceptual Explanation: First-pass metabolism refers to the metabolism of a drug in the
liver or gut wall after oral administration, reducing the concentration that reaches the
systemic circulation.
6. A patient is taking Warfarin and is started on Amiodarone. What is the expected
interaction?
A. Amiodarone inhibits CYP enzymes, increasing Warfarin levels and INR.
B. Amiodarone induces CYP enzymes, decreasing Warfarin levels.
C. Amiodarone increases Vitamin K synthesis in the gut.
D. There is no significant interaction between these drugs.
