NURS 6521 ADVANCED
PHARMACOLOGY MIDTERM EXAM
QUESTIONS AND VERIFIED ANSWERS
|GRADE A+| JUST RELEASED
1. A 75-year-old patient is prescribed a highly lipophilic drug. Which age-related physiological
change should the advanced practice nurse consider regarding the drug’s distribution?
A. Decreased total body fat increasing serum concentration
B. Increased total body water decreasing the drug’s half-life
C. Increased total body fat leading to a larger volume of distribution and prolonged half-life
D. Decreased serum albumin increasing the rate of excretion
Answer: C
Conceptual Explanation: In older adults, total body fat increases while lean body mass
and total body water decrease. For lipophilic drugs, this results in an increased volume of
distribution and a prolonged half-life as the drug is stored in adipose tissue.
,2. Which mechanism best explains why a patient taking an ACE inhibitor might develop a dry,
non-productive cough?
A. Accumulation of bradykinin and substance P in the respiratory tract
B. Direct irritation of the bronchial mucosa by the drug molecule
C. Increased production of Angiotensin II in lung tissue
D. Local vasoconstriction caused by inhibition of prostaglandin synthesis
Answer: A
Conceptual Explanation: ACE inhibitors prevent the breakdown of bradykinin and
substance P. The accumulation of these inflammatory mediators in the lungs can trigger a
dry, persistent cough in susceptible individuals.
3. A patient with a history of heart failure is taking Digoxin. They are now prescribed
Furosemide. What is the primary concern regarding this drug combination?
A. Furosemide increases Digoxin absorption in the small intestine
B. Hyperkalemia caused by Furosemide antagonizes Digoxin at the Na+/K+ ATPase pump
C. Furosemide inhibits the renal excretion of Digoxin through the P-glycoprotein
transporter
D. Hypokalemia caused by Furosemide increases the risk of Digoxin toxicity
Answer: D
, Conceptual Explanation: Furosemide is a loop diuretic that can cause potassium loss.
Digoxin competes with potassium for binding sites on the Na+/K+ ATPase pump. Low
potassium levels allow more Digoxin to bind, significantly increasing the risk of toxicity.
4. Which pharmacokinetic process is most affected by the ‘First-Pass Effect’?
A. Distribution
B. Excretion
C. Metabolism
D. Absorption
Answer: C
Conceptual Explanation: The first-pass effect refers to the rapid hepatic metabolism of a
drug absorbed from the gastrointestinal tract before it reaches the systemic circulation,
effectively reducing its bioavailability.
5. A patient is diagnosed with Myasthenia Gravis and started on Pyridostigmine. What is the
mechanism of action for this medication?
A. Direct stimulation of nicotinic receptors at the neuromuscular junction
B. Inhibition of acetylcholinesterase, increasing the availability of acetylcholine
C. Blockade of muscarinic receptors to prevent acetylcholine degradation
D. Increased release of acetylcholine from presynaptic neurons
Answer: B
PHARMACOLOGY MIDTERM EXAM
QUESTIONS AND VERIFIED ANSWERS
|GRADE A+| JUST RELEASED
1. A 75-year-old patient is prescribed a highly lipophilic drug. Which age-related physiological
change should the advanced practice nurse consider regarding the drug’s distribution?
A. Decreased total body fat increasing serum concentration
B. Increased total body water decreasing the drug’s half-life
C. Increased total body fat leading to a larger volume of distribution and prolonged half-life
D. Decreased serum albumin increasing the rate of excretion
Answer: C
Conceptual Explanation: In older adults, total body fat increases while lean body mass
and total body water decrease. For lipophilic drugs, this results in an increased volume of
distribution and a prolonged half-life as the drug is stored in adipose tissue.
,2. Which mechanism best explains why a patient taking an ACE inhibitor might develop a dry,
non-productive cough?
A. Accumulation of bradykinin and substance P in the respiratory tract
B. Direct irritation of the bronchial mucosa by the drug molecule
C. Increased production of Angiotensin II in lung tissue
D. Local vasoconstriction caused by inhibition of prostaglandin synthesis
Answer: A
Conceptual Explanation: ACE inhibitors prevent the breakdown of bradykinin and
substance P. The accumulation of these inflammatory mediators in the lungs can trigger a
dry, persistent cough in susceptible individuals.
3. A patient with a history of heart failure is taking Digoxin. They are now prescribed
Furosemide. What is the primary concern regarding this drug combination?
A. Furosemide increases Digoxin absorption in the small intestine
B. Hyperkalemia caused by Furosemide antagonizes Digoxin at the Na+/K+ ATPase pump
C. Furosemide inhibits the renal excretion of Digoxin through the P-glycoprotein
transporter
D. Hypokalemia caused by Furosemide increases the risk of Digoxin toxicity
Answer: D
, Conceptual Explanation: Furosemide is a loop diuretic that can cause potassium loss.
Digoxin competes with potassium for binding sites on the Na+/K+ ATPase pump. Low
potassium levels allow more Digoxin to bind, significantly increasing the risk of toxicity.
4. Which pharmacokinetic process is most affected by the ‘First-Pass Effect’?
A. Distribution
B. Excretion
C. Metabolism
D. Absorption
Answer: C
Conceptual Explanation: The first-pass effect refers to the rapid hepatic metabolism of a
drug absorbed from the gastrointestinal tract before it reaches the systemic circulation,
effectively reducing its bioavailability.
5. A patient is diagnosed with Myasthenia Gravis and started on Pyridostigmine. What is the
mechanism of action for this medication?
A. Direct stimulation of nicotinic receptors at the neuromuscular junction
B. Inhibition of acetylcholinesterase, increasing the availability of acetylcholine
C. Blockade of muscarinic receptors to prevent acetylcholine degradation
D. Increased release of acetylcholine from presynaptic neurons
Answer: B
