1
NUR 1141 Introduction to Pharmacology —
Final Exam Questions and Answers with
Rationales| Newest
UNIT 1: FOUNDATIONAL PRINCIPLES OF PHARMACOLOGY
Question 1
A nurse is preparing to administer a medication orally. Which process describes
the movement of the drug from the gastrointestinal tract into the body's fluids?
A) Distribution
B) Metabolism
C) Absorption
D) Excretion
Correct Answer: C) Absorption
Rationale: Absorption is the movement of drug particles from the GI tract into
body fluids. This can occur through passive absorption (diffusion), active
absorption (requiring energy and a carrier), or pinocytosis (cell engulfing drug
particles). Distribution (A) is the transport of drug throughout the body.
Question 2
The "first-pass effect" refers to which physiological process?
A) Initial drug absorption in the stomach
B) Drug metabolism in the liver before reaching systemic circulation
C) Drug excretion through the kidneys
D) Rapid distribution to target tissues
Correct Answer: B) Drug metabolism in the liver before reaching systemic
circulation
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Rationale: Orally administered drugs are absorbed from the GI tract and travel via
the portal vein to the liver, where they may be extensively metabolized before
reaching systemic circulation. This reduces bioavailability. Drugs administered
sublingually or IV bypass this effect.
Question 3
Which term describes the study of what a drug does to the body, including its
mechanisms of action?
A) Pharmacokinetics
B) Pharmacodynamics
C) Toxicology
D) Pharmaceutics
Correct Answer: B) Pharmacodynamics
Rationale: Pharmacodynamics focuses on the drug's effects on the body,
including receptor binding, mechanisms of action, and therapeutic responses.
Pharmacokinetics (A) describes what the body does to the drug (absorption,
distribution, metabolism, excretion).
Question 4
A patient with liver disease is receiving a medication with a half-life of 30 hours.
What is the expected effect on this medication's duration of action?
A) Duration will increase
B) Duration will decrease
C) Duration will remain unchanged
D) The medication will be excreted faster
Correct Answer: A) Duration will increase
Rationale: The liver is the primary organ responsible for drug metabolism. With
impaired liver function, drug metabolism is reduced, leading to prolonged drug
duration and increased risk of accumulation and toxicity. Dosage adjustments are
often needed.
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Question 5
Which organ is the primary site of drug metabolism?
A) Kidney
B) Liver
C) Lungs
D) Small intestine
Correct Answer: B) Liver
Rationale: The liver metabolizes most drugs through enzymatic processes
(biotransformation), converting lipid-soluble drugs into more water-soluble
compounds for excretion. The kidneys (A) are the primary site of drug excretion.
Question 6
A nurse notes that "Lasix" is prescribed for a patient. This name represents
which type of drug name?
A) Generic name
B) Chemical name
C) Nonproprietary name
D) Brand name
Correct Answer: D) Brand name
Rationale: Lasix is the brand (trade) name for furosemide. The generic name is
furosemide. Brand names are registered trademarks and indicate restricted
commercial use to the patent owner. Generic names are the official
nonproprietary name.
Question 7
What is the therapeutic index of a drug?
, 4
A) The ratio of the drug's effectiveness to its side effects
B) The ratio of the drug's toxic dose to its therapeutic dose
C) The time required for the drug to reach peak concentration
D) The percentage of drug that reaches systemic circulation
Correct Answer: B) The ratio of the drug's toxic dose to its therapeutic dose
Rationale: The therapeutic index is a measure of drug safety (TD50/ED50). A
narrow therapeutic index (e.g., digoxin, warfarin, lithium) means the therapeutic
dose is close to the toxic dose, requiring careful monitoring of serum levels.
Question 8
A medication's onset of action refers to:
A) The time it takes for the drug to reach its maximum concentration
B) The time it takes for the drug to produce a therapeutic effect
C) The time required for the drug to be eliminated
D) The duration the drug remains in the body
Correct Answer: B) The time it takes for the drug to produce a therapeutic effect
Rationale: Onset of action is the time required for a drug to begin producing a
therapeutic effect. Peak effect (A) is when the drug reaches its maximum effect.
Duration of action is the length of time the drug produces its therapeutic effect.
Question 9
Which factor does NOT affect drug absorption?
A) Route of administration
B) Blood flow to the absorption site
C) Lipid solubility of the drug
D) The drug's mechanism of action
Correct Answer: D) The drug's mechanism of action
Rationale: The mechanism of action (pharmacodynamics) does not affect
absorption. Absorption is influenced by route, blood flow, lipid solubility, pH,
NUR 1141 Introduction to Pharmacology —
Final Exam Questions and Answers with
Rationales| Newest
UNIT 1: FOUNDATIONAL PRINCIPLES OF PHARMACOLOGY
Question 1
A nurse is preparing to administer a medication orally. Which process describes
the movement of the drug from the gastrointestinal tract into the body's fluids?
A) Distribution
B) Metabolism
C) Absorption
D) Excretion
Correct Answer: C) Absorption
Rationale: Absorption is the movement of drug particles from the GI tract into
body fluids. This can occur through passive absorption (diffusion), active
absorption (requiring energy and a carrier), or pinocytosis (cell engulfing drug
particles). Distribution (A) is the transport of drug throughout the body.
Question 2
The "first-pass effect" refers to which physiological process?
A) Initial drug absorption in the stomach
B) Drug metabolism in the liver before reaching systemic circulation
C) Drug excretion through the kidneys
D) Rapid distribution to target tissues
Correct Answer: B) Drug metabolism in the liver before reaching systemic
circulation
,2
Rationale: Orally administered drugs are absorbed from the GI tract and travel via
the portal vein to the liver, where they may be extensively metabolized before
reaching systemic circulation. This reduces bioavailability. Drugs administered
sublingually or IV bypass this effect.
Question 3
Which term describes the study of what a drug does to the body, including its
mechanisms of action?
A) Pharmacokinetics
B) Pharmacodynamics
C) Toxicology
D) Pharmaceutics
Correct Answer: B) Pharmacodynamics
Rationale: Pharmacodynamics focuses on the drug's effects on the body,
including receptor binding, mechanisms of action, and therapeutic responses.
Pharmacokinetics (A) describes what the body does to the drug (absorption,
distribution, metabolism, excretion).
Question 4
A patient with liver disease is receiving a medication with a half-life of 30 hours.
What is the expected effect on this medication's duration of action?
A) Duration will increase
B) Duration will decrease
C) Duration will remain unchanged
D) The medication will be excreted faster
Correct Answer: A) Duration will increase
Rationale: The liver is the primary organ responsible for drug metabolism. With
impaired liver function, drug metabolism is reduced, leading to prolonged drug
duration and increased risk of accumulation and toxicity. Dosage adjustments are
often needed.
,3
Question 5
Which organ is the primary site of drug metabolism?
A) Kidney
B) Liver
C) Lungs
D) Small intestine
Correct Answer: B) Liver
Rationale: The liver metabolizes most drugs through enzymatic processes
(biotransformation), converting lipid-soluble drugs into more water-soluble
compounds for excretion. The kidneys (A) are the primary site of drug excretion.
Question 6
A nurse notes that "Lasix" is prescribed for a patient. This name represents
which type of drug name?
A) Generic name
B) Chemical name
C) Nonproprietary name
D) Brand name
Correct Answer: D) Brand name
Rationale: Lasix is the brand (trade) name for furosemide. The generic name is
furosemide. Brand names are registered trademarks and indicate restricted
commercial use to the patent owner. Generic names are the official
nonproprietary name.
Question 7
What is the therapeutic index of a drug?
, 4
A) The ratio of the drug's effectiveness to its side effects
B) The ratio of the drug's toxic dose to its therapeutic dose
C) The time required for the drug to reach peak concentration
D) The percentage of drug that reaches systemic circulation
Correct Answer: B) The ratio of the drug's toxic dose to its therapeutic dose
Rationale: The therapeutic index is a measure of drug safety (TD50/ED50). A
narrow therapeutic index (e.g., digoxin, warfarin, lithium) means the therapeutic
dose is close to the toxic dose, requiring careful monitoring of serum levels.
Question 8
A medication's onset of action refers to:
A) The time it takes for the drug to reach its maximum concentration
B) The time it takes for the drug to produce a therapeutic effect
C) The time required for the drug to be eliminated
D) The duration the drug remains in the body
Correct Answer: B) The time it takes for the drug to produce a therapeutic effect
Rationale: Onset of action is the time required for a drug to begin producing a
therapeutic effect. Peak effect (A) is when the drug reaches its maximum effect.
Duration of action is the length of time the drug produces its therapeutic effect.
Question 9
Which factor does NOT affect drug absorption?
A) Route of administration
B) Blood flow to the absorption site
C) Lipid solubility of the drug
D) The drug's mechanism of action
Correct Answer: D) The drug's mechanism of action
Rationale: The mechanism of action (pharmacodynamics) does not affect
absorption. Absorption is influenced by route, blood flow, lipid solubility, pH,
