Pharmacology Final Exam Version 3 Practice Questions 2026 |WGU
1. Which pharmacokinetic process involves the movement of a drug from its site
of administration into the bloodstream?
A. Distribution
B. Absorption
C. Metabolism
D. Excretion
Answer: B
Rationale: Absorption is the process by which a drug moves from its site of administration
into the systemic circulation.
2. Which term describes the phenomenon where the concentration of a drug is
greatly reduced before it reaches the systemic circulation, typically by the liver?
A. Bioavailability
B. Half-life
C. First-pass effect
D. Enzyme induction
Answer: C
Rationale: The first-pass effect occurs when a drug is metabolized by the liver immediately
after absorption from the GI tract, reducing its systemic concentration.
,3. A drug that binds to a receptor and activates it to produce a biological
response is known as:
A. Antagonist
B. Agonist
C. Inverse agonist
D. Inhibitor
Answer: B
Rationale: An agonist is a molecule that mimics the action of a naturally occurring
substance by binding to and activating a receptor.
4. What is the primary site of drug metabolism in the human body?
A. Kidneys
B. Lungs
C. Small Intestine
D. Liver
Answer: D
Rationale: While metabolism can occur in various tissues, the liver is the primary organ
responsible for drug biotransformation.
5. Which parameter is used to determine the safety margin of a drug?
A. Therapeutic index
B. Peak level
C. Trough level
D. Loading dose
Answer: A
Rationale: The therapeutic index is the ratio of the dose that produces toxicity to the dose
that produces a clinically desired effect.
, 6. A patient is prescribed a drug with a short half-life. How frequently will this
drug likely need to be administered?
A. Once daily
B. Once weekly
C. Multiple times per day
D. Every other day
Answer: C
Rationale: Drugs with short half-lives are eliminated quickly and require more frequent
dosing to maintain therapeutic levels.
7. Which route of administration provides 100% bioavailability?
A. Oral
B. Subcutaneous
C. Intramuscular
D. Intravenous
Answer: D
Rationale: Intravenous administration bypasses absorption barriers and the first-pass
effect, delivering the full dose directly into the bloodstream.
8. Anticholinergic drugs are contraindicated in patients with which of the
following conditions?
A. Glaucoma
B. Hypertension
C. Diarrhea
D. Bradycardia
Answer: A
Rationale: Anticholinergics can increase intraocular pressure, which is dangerous for
patients with narrow-angle glaucoma.
1. Which pharmacokinetic process involves the movement of a drug from its site
of administration into the bloodstream?
A. Distribution
B. Absorption
C. Metabolism
D. Excretion
Answer: B
Rationale: Absorption is the process by which a drug moves from its site of administration
into the systemic circulation.
2. Which term describes the phenomenon where the concentration of a drug is
greatly reduced before it reaches the systemic circulation, typically by the liver?
A. Bioavailability
B. Half-life
C. First-pass effect
D. Enzyme induction
Answer: C
Rationale: The first-pass effect occurs when a drug is metabolized by the liver immediately
after absorption from the GI tract, reducing its systemic concentration.
,3. A drug that binds to a receptor and activates it to produce a biological
response is known as:
A. Antagonist
B. Agonist
C. Inverse agonist
D. Inhibitor
Answer: B
Rationale: An agonist is a molecule that mimics the action of a naturally occurring
substance by binding to and activating a receptor.
4. What is the primary site of drug metabolism in the human body?
A. Kidneys
B. Lungs
C. Small Intestine
D. Liver
Answer: D
Rationale: While metabolism can occur in various tissues, the liver is the primary organ
responsible for drug biotransformation.
5. Which parameter is used to determine the safety margin of a drug?
A. Therapeutic index
B. Peak level
C. Trough level
D. Loading dose
Answer: A
Rationale: The therapeutic index is the ratio of the dose that produces toxicity to the dose
that produces a clinically desired effect.
, 6. A patient is prescribed a drug with a short half-life. How frequently will this
drug likely need to be administered?
A. Once daily
B. Once weekly
C. Multiple times per day
D. Every other day
Answer: C
Rationale: Drugs with short half-lives are eliminated quickly and require more frequent
dosing to maintain therapeutic levels.
7. Which route of administration provides 100% bioavailability?
A. Oral
B. Subcutaneous
C. Intramuscular
D. Intravenous
Answer: D
Rationale: Intravenous administration bypasses absorption barriers and the first-pass
effect, delivering the full dose directly into the bloodstream.
8. Anticholinergic drugs are contraindicated in patients with which of the
following conditions?
A. Glaucoma
B. Hypertension
C. Diarrhea
D. Bradycardia
Answer: A
Rationale: Anticholinergics can increase intraocular pressure, which is dangerous for
patients with narrow-angle glaucoma.
