Pharmacology NURS 251 Module 1 to 10,
Exam () Portage Learning /
ABCnursing / Geneva College Questions and
Verified Answers – 100% Guarantee Pass
Question 1: The study of what the body does to a drug (absorption, distribution,
metabolism, excretion) is known as:
A. Pharmacodynamics
B. Pharmacokinetics
C. Pharmacotherapeutics
D. Pharmacogenomics
Correct Answer: B. Pharmacokinetics
Rationale: Pharmacokinetics describes drug movement through the body.
Pharmacodynamics describes what the drug does to the body.
Question 2: Which process involves the movement of a drug from its
administration site into the bloodstream?
A. Distribution
B. Metabolism
C. Absorption
D. Excretion
Correct Answer: C. Absorption
Rationale: Absorption is the first phase of pharmacokinetics, determining how
quickly and efficiently a drug enters systemic circulation.
Question 3: A drug that is highly protein-bound will have what characteristic?
A. Rapid excretion
B. Long duration of action
C. Immediate onset
D. Low risk of drug interactions
,Correct Answer: B. Long duration of action
Rationale: Protein-bound drugs are stored in the bloodstream and released slowly,
prolonging their therapeutic effect.
Question 4: Which organ is primarily responsible for drug metabolism?
A. Kidney
B. Liver
C. Heart
D. Lung
Correct Answer: B. Liver
Rationale: The liver contains cytochrome P450 enzymes that metabolize most
drugs into water-soluble forms for excretion.
Question 5: A patient with renal failure may require dosage adjustment due to
impaired:
A. Absorption
B. Distribution
C. Metabolism
D. Excretion
Correct Answer: D. Excretion
Rationale: The kidneys excrete most drugs and their metabolites. Renal
impairment can lead to drug accumulation and toxicity.
Question 6: The term "first-pass effect" refers to:
A. Drug absorption through the skin
B. Drug metabolism in the liver before reaching systemic circulation
C. Drug excretion in the urine
D. Drug binding to plasma proteins
Correct Answer: B. Drug metabolism in the liver before reaching systemic
circulation
Rationale: Orally administered drugs are absorbed from the GI tract and carried
via the portal vein to the liver, where they may be partially metabolized before
reaching systemic circulation.
,Question 7: Which route of administration completely bypasses the first-pass
effect?
A. Oral
B. Sublingual
C. Rectal
D. Intravenous
Correct Answer: D. Intravenous
Rationale: IV administration places the drug directly into systemic circulation,
completely avoiding hepatic first-pass metabolism. Sublingual and rectal routes
partially bypass it.
Question 8: What is the half-life (t½) of a drug?
A. The time required for the drug to reach peak plasma concentration
B. The time required for the drug concentration to decrease by 50%
C. The time required for the drug to be completely eliminated
D. The time required for the drug to begin working
Correct Answer: B. The time required for the drug concentration to decrease
by 50%
Rationale: Half-life is a constant that determines dosing frequency and time to
steady state.
Question 9: Steady state of a drug is usually achieved after approximately how
many half-lives?
A. 1–2
B. 3–5
C. 6–8
D. 10–12
Correct Answer: B. 3–5
Rationale: Steady state is reached after about 4–5 half-lives, regardless of dose.
, Question 10: A drug with a narrow therapeutic index requires:
A. Less frequent monitoring
B. No special precautions
C. Careful monitoring due to small margin between efficacy and toxicity
D. Higher doses to be effective
Correct Answer: C. Careful monitoring due to small margin between efficacy
and toxicity
Rationale: Narrow therapeutic index drugs (e.g., warfarin, digoxin, lithium) have a
small safety margin.
Question 11: Which of the following best defines pharmacodynamics?
A. The study of drug absorption and distribution
B. The study of what the drug does to the body
C. The study of drug excretion pathways
D. The study of genetic factors affecting drug response
Correct Answer: B. The study of what the drug does to the body
Rationale: Pharmacodynamics includes drug–receptor interactions, dose–response
relationships, and therapeutic effects.
Question 12: An agonist is a drug that:
A. Binds to a receptor and blocks it
B. Binds to a receptor and activates it
C. Has no effect on receptors
D. Increases drug metabolism
Correct Answer: B. Binds to a receptor and activates it
Rationale: Agonists produce a biological response; antagonists block the response.
Question 13: A competitive antagonist:
A. Binds irreversibly to the receptor
B. Binds reversibly to the same receptor site as the agonist
C. Activates the receptor at a different site
D. Increases agonist efficacy
Exam () Portage Learning /
ABCnursing / Geneva College Questions and
Verified Answers – 100% Guarantee Pass
Question 1: The study of what the body does to a drug (absorption, distribution,
metabolism, excretion) is known as:
A. Pharmacodynamics
B. Pharmacokinetics
C. Pharmacotherapeutics
D. Pharmacogenomics
Correct Answer: B. Pharmacokinetics
Rationale: Pharmacokinetics describes drug movement through the body.
Pharmacodynamics describes what the drug does to the body.
Question 2: Which process involves the movement of a drug from its
administration site into the bloodstream?
A. Distribution
B. Metabolism
C. Absorption
D. Excretion
Correct Answer: C. Absorption
Rationale: Absorption is the first phase of pharmacokinetics, determining how
quickly and efficiently a drug enters systemic circulation.
Question 3: A drug that is highly protein-bound will have what characteristic?
A. Rapid excretion
B. Long duration of action
C. Immediate onset
D. Low risk of drug interactions
,Correct Answer: B. Long duration of action
Rationale: Protein-bound drugs are stored in the bloodstream and released slowly,
prolonging their therapeutic effect.
Question 4: Which organ is primarily responsible for drug metabolism?
A. Kidney
B. Liver
C. Heart
D. Lung
Correct Answer: B. Liver
Rationale: The liver contains cytochrome P450 enzymes that metabolize most
drugs into water-soluble forms for excretion.
Question 5: A patient with renal failure may require dosage adjustment due to
impaired:
A. Absorption
B. Distribution
C. Metabolism
D. Excretion
Correct Answer: D. Excretion
Rationale: The kidneys excrete most drugs and their metabolites. Renal
impairment can lead to drug accumulation and toxicity.
Question 6: The term "first-pass effect" refers to:
A. Drug absorption through the skin
B. Drug metabolism in the liver before reaching systemic circulation
C. Drug excretion in the urine
D. Drug binding to plasma proteins
Correct Answer: B. Drug metabolism in the liver before reaching systemic
circulation
Rationale: Orally administered drugs are absorbed from the GI tract and carried
via the portal vein to the liver, where they may be partially metabolized before
reaching systemic circulation.
,Question 7: Which route of administration completely bypasses the first-pass
effect?
A. Oral
B. Sublingual
C. Rectal
D. Intravenous
Correct Answer: D. Intravenous
Rationale: IV administration places the drug directly into systemic circulation,
completely avoiding hepatic first-pass metabolism. Sublingual and rectal routes
partially bypass it.
Question 8: What is the half-life (t½) of a drug?
A. The time required for the drug to reach peak plasma concentration
B. The time required for the drug concentration to decrease by 50%
C. The time required for the drug to be completely eliminated
D. The time required for the drug to begin working
Correct Answer: B. The time required for the drug concentration to decrease
by 50%
Rationale: Half-life is a constant that determines dosing frequency and time to
steady state.
Question 9: Steady state of a drug is usually achieved after approximately how
many half-lives?
A. 1–2
B. 3–5
C. 6–8
D. 10–12
Correct Answer: B. 3–5
Rationale: Steady state is reached after about 4–5 half-lives, regardless of dose.
, Question 10: A drug with a narrow therapeutic index requires:
A. Less frequent monitoring
B. No special precautions
C. Careful monitoring due to small margin between efficacy and toxicity
D. Higher doses to be effective
Correct Answer: C. Careful monitoring due to small margin between efficacy
and toxicity
Rationale: Narrow therapeutic index drugs (e.g., warfarin, digoxin, lithium) have a
small safety margin.
Question 11: Which of the following best defines pharmacodynamics?
A. The study of drug absorption and distribution
B. The study of what the drug does to the body
C. The study of drug excretion pathways
D. The study of genetic factors affecting drug response
Correct Answer: B. The study of what the drug does to the body
Rationale: Pharmacodynamics includes drug–receptor interactions, dose–response
relationships, and therapeutic effects.
Question 12: An agonist is a drug that:
A. Binds to a receptor and blocks it
B. Binds to a receptor and activates it
C. Has no effect on receptors
D. Increases drug metabolism
Correct Answer: B. Binds to a receptor and activates it
Rationale: Agonists produce a biological response; antagonists block the response.
Question 13: A competitive antagonist:
A. Binds irreversibly to the receptor
B. Binds reversibly to the same receptor site as the agonist
C. Activates the receptor at a different site
D. Increases agonist efficacy
