NURS 5220 ADVANCED
PHARMACOLOGY AND
PATHOPHYSIOLOGY EXAM 1 REVIEW
QUESTIONS & VERIFIED ANSWERS (A+
GUARANTEE)
1. Which pharmacokinetic process is most significantly affected by the ‘first-pass effect’
during oral drug administration?
A. Distribution to peripheral tissues
B. Bioavailability in the systemic circulation
C. Renal tubular secretion
D. Protein binding in the plasma
Answer: B
Conceptual Explanation: The first-pass effect refers to the metabolism of a drug in the
liver or gut wall before it reaches systemic circulation, which directly reduces the drug’s
bioavailability.
2. A patient is prescribed a drug that is a potent inducer of the CYP3A4 enzyme. What is the
most likely clinical consequence for a co-administered drug that is a substrate of the same
enzyme?
A. Decreased therapeutic effect of the substrate drug
,B. Increased risk of toxicity of the substrate drug
C. Delayed absorption of the substrate drug
D. Increased plasma concentration of the substrate drug
Answer: A
Conceptual Explanation: Enzyme induction increases the rate of metabolism of substrate
drugs, leading to lower plasma levels and potentially sub-therapeutic effects.
3. Which statement best describes the concept of ‘Steady State’ in pharmacology?
A. When the amount of drug administered equals the amount of drug eliminated
B. When the drug reaches its peak concentration after the first dose
C. When the drug is completely cleared from the body
D. When the drug occupies 50 percent of all available receptors
Answer: A
Conceptual Explanation: Steady state occurs when the rate of drug input equals the rate
of drug output, typically reached after 4 to 5 half-lives.
4. In zero-order kinetics, the rate of drug elimination is:
A. Proportional to the plasma concentration
B. Constant regardless of the plasma concentration
C. Dependent on the volume of distribution
, D. Determined by the drug’s half-life
Answer: B
Conceptual Explanation: Zero-order kinetics means a constant amount of drug is
eliminated per unit time, often because metabolic pathways are saturated (e.g., alcohol,
phenytoin).
5. Which receptor type is primarily responsible for increasing heart rate and contractility
when stimulated by norepinephrine?
A. Beta-1 adrenergic receptors
B. Alpha-2 adrenergic receptors
C. Alpha-1 adrenergic receptors
D. Beta-2 adrenergic receptors
Answer: A
Conceptual Explanation: Beta-1 receptors are located primarily in the heart and lead to
positive inotropic and chronotropic effects when stimulated.
6. A patient with myasthenia gravis is treated with pyridostigmine. What is the mechanism of
action of this medication?
A. Activation of nicotinic receptors
B. Blockade of muscarinic receptors
C. Inhibition of acetylcholinesterase
PHARMACOLOGY AND
PATHOPHYSIOLOGY EXAM 1 REVIEW
QUESTIONS & VERIFIED ANSWERS (A+
GUARANTEE)
1. Which pharmacokinetic process is most significantly affected by the ‘first-pass effect’
during oral drug administration?
A. Distribution to peripheral tissues
B. Bioavailability in the systemic circulation
C. Renal tubular secretion
D. Protein binding in the plasma
Answer: B
Conceptual Explanation: The first-pass effect refers to the metabolism of a drug in the
liver or gut wall before it reaches systemic circulation, which directly reduces the drug’s
bioavailability.
2. A patient is prescribed a drug that is a potent inducer of the CYP3A4 enzyme. What is the
most likely clinical consequence for a co-administered drug that is a substrate of the same
enzyme?
A. Decreased therapeutic effect of the substrate drug
,B. Increased risk of toxicity of the substrate drug
C. Delayed absorption of the substrate drug
D. Increased plasma concentration of the substrate drug
Answer: A
Conceptual Explanation: Enzyme induction increases the rate of metabolism of substrate
drugs, leading to lower plasma levels and potentially sub-therapeutic effects.
3. Which statement best describes the concept of ‘Steady State’ in pharmacology?
A. When the amount of drug administered equals the amount of drug eliminated
B. When the drug reaches its peak concentration after the first dose
C. When the drug is completely cleared from the body
D. When the drug occupies 50 percent of all available receptors
Answer: A
Conceptual Explanation: Steady state occurs when the rate of drug input equals the rate
of drug output, typically reached after 4 to 5 half-lives.
4. In zero-order kinetics, the rate of drug elimination is:
A. Proportional to the plasma concentration
B. Constant regardless of the plasma concentration
C. Dependent on the volume of distribution
, D. Determined by the drug’s half-life
Answer: B
Conceptual Explanation: Zero-order kinetics means a constant amount of drug is
eliminated per unit time, often because metabolic pathways are saturated (e.g., alcohol,
phenytoin).
5. Which receptor type is primarily responsible for increasing heart rate and contractility
when stimulated by norepinephrine?
A. Beta-1 adrenergic receptors
B. Alpha-2 adrenergic receptors
C. Alpha-1 adrenergic receptors
D. Beta-2 adrenergic receptors
Answer: A
Conceptual Explanation: Beta-1 receptors are located primarily in the heart and lead to
positive inotropic and chronotropic effects when stimulated.
6. A patient with myasthenia gravis is treated with pyridostigmine. What is the mechanism of
action of this medication?
A. Activation of nicotinic receptors
B. Blockade of muscarinic receptors
C. Inhibition of acetylcholinesterase
