NU 641 ADVANCED PHARMACOLOGY
COMPREHENSIVE FINAL EXAM PREP
QUESTIONS AND ANSWERS AND
EXPLANATIONS | LATEST - REGIS
1. A drug with a high volume of distribution (Vd) is likely to have which characteristic?
A. It remains primarily in the intravascular space.
B. It is highly protein-bound to albumin.
C. It is rapidly cleared by the kidneys via filtration.
D. It has high lipid solubility and penetrates tissues easily.
Answer: D
Conceptual Explanation: A high Vd indicates that the drug is distributed extensively into
the body tissues rather than remaining in the plasma. This is typical of lipophilic drugs.
2. Which cytochrome P450 interaction occurs when a patient taking Warfarin begins a course
of Rifampin?
A. Rifampin inhibits CYP2C9, increasing Warfarin levels.
B. Rifampin induces CYP2C9, decreasing Warfarin levels.
C. Rifampin competes for albumin binding sites, increasing free Warfarin.
D. Rifampin blocks Vitamin K epoxide reductase directly.
,Answer: B
Conceptual Explanation: Rifampin is a potent enzyme inducer. Inducing the CYP enzymes
responsible for metabolizing Warfarin leads to faster clearance and a subtherapeutic INR.
3. In the presence of a non-competitive antagonist, what happens to the agonist’s log dose-
response curve?
A. The curve shifts to the right without a change in maximal effect.
B. The maximal response (Emax) decreases, but the EC50 remains unchanged.
C. The curve shifts to the left, increasing potency.
D. The curve disappears entirely as all receptors are occupied.
Answer: B
Conceptual Explanation: Non-competitive antagonists reduce the maximal effect
(efficacy) because they bind irreversibly or at an allosteric site, effectively removing
functional receptors from the system.
4. A patient is prescribed Prazosin for hypertension. Which ‘first-dose’ phenomenon should
the nurse practitioner warn the patient about?
A. Orthostatic hypotension and syncope
B. Reflex bradycardia
C. Acute urinary retention
D. Hypertensive crisis
, Answer: A
Conceptual Explanation: Alpha-1 blockers like Prazosin can cause significant orthostatic
hypotension, particularly with the first dose, potentially leading to syncope.
5. Which physiological effect is expected from the activation of Beta-2 adrenergic receptors?
A. Bronchoconstriction
B. Decreased glycogenolysis
C. Relaxation of uterine smooth muscle
D. Increased GI motility
Answer: C
Conceptual Explanation: Beta-2 activation causes smooth muscle relaxation in the
bronchioles (bronchodilation), blood vessels, and uterus.
6. What is the primary mechanism of action of Lisinopril in treating heart failure?
A. Directly blocking the AT1 receptor
B. Antagonizing aldosterone in the distal tubule
C. Inhibiting the conversion of Angiotensin I to Angiotensin II
D. Increasing the breakdown of bradykinin
Answer: C
COMPREHENSIVE FINAL EXAM PREP
QUESTIONS AND ANSWERS AND
EXPLANATIONS | LATEST - REGIS
1. A drug with a high volume of distribution (Vd) is likely to have which characteristic?
A. It remains primarily in the intravascular space.
B. It is highly protein-bound to albumin.
C. It is rapidly cleared by the kidneys via filtration.
D. It has high lipid solubility and penetrates tissues easily.
Answer: D
Conceptual Explanation: A high Vd indicates that the drug is distributed extensively into
the body tissues rather than remaining in the plasma. This is typical of lipophilic drugs.
2. Which cytochrome P450 interaction occurs when a patient taking Warfarin begins a course
of Rifampin?
A. Rifampin inhibits CYP2C9, increasing Warfarin levels.
B. Rifampin induces CYP2C9, decreasing Warfarin levels.
C. Rifampin competes for albumin binding sites, increasing free Warfarin.
D. Rifampin blocks Vitamin K epoxide reductase directly.
,Answer: B
Conceptual Explanation: Rifampin is a potent enzyme inducer. Inducing the CYP enzymes
responsible for metabolizing Warfarin leads to faster clearance and a subtherapeutic INR.
3. In the presence of a non-competitive antagonist, what happens to the agonist’s log dose-
response curve?
A. The curve shifts to the right without a change in maximal effect.
B. The maximal response (Emax) decreases, but the EC50 remains unchanged.
C. The curve shifts to the left, increasing potency.
D. The curve disappears entirely as all receptors are occupied.
Answer: B
Conceptual Explanation: Non-competitive antagonists reduce the maximal effect
(efficacy) because they bind irreversibly or at an allosteric site, effectively removing
functional receptors from the system.
4. A patient is prescribed Prazosin for hypertension. Which ‘first-dose’ phenomenon should
the nurse practitioner warn the patient about?
A. Orthostatic hypotension and syncope
B. Reflex bradycardia
C. Acute urinary retention
D. Hypertensive crisis
, Answer: A
Conceptual Explanation: Alpha-1 blockers like Prazosin can cause significant orthostatic
hypotension, particularly with the first dose, potentially leading to syncope.
5. Which physiological effect is expected from the activation of Beta-2 adrenergic receptors?
A. Bronchoconstriction
B. Decreased glycogenolysis
C. Relaxation of uterine smooth muscle
D. Increased GI motility
Answer: C
Conceptual Explanation: Beta-2 activation causes smooth muscle relaxation in the
bronchioles (bronchodilation), blood vessels, and uterus.
6. What is the primary mechanism of action of Lisinopril in treating heart failure?
A. Directly blocking the AT1 receptor
B. Antagonizing aldosterone in the distal tubule
C. Inhibiting the conversion of Angiotensin I to Angiotensin II
D. Increasing the breakdown of bradykinin
Answer: C
