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WGU D116 ADVANCED PHARMACOLOGY
FINAL EXAM OBJECTIVE ASSESSMENT &
PRACTICE QUESTION BANK WITH 500+
# SECTION 1: PHARMACOKINETICS & PHARMACODYNAMICS
## 1.1 Drug Absorption
### Q1.
Which of the following best describes the difference between pharmacokinetics and
pharmacodynamics?
A) Pharmacokinetics is what the drug does to the body; pharmacodynamics is what the body
does to the drug
B) Pharmacokinetics is what the body does to the drug; pharmacodynamics is what the drug does
to the body
C) There is no meaningful difference between pharmacokinetics and pharmacodynamics
D) Pharmacokinetics involves drug efficacy; pharmacodynamics involves drug metabolism
**Correct Answer: B**
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**Rationale:** Pharmacokinetics describes "what the body does to the drug" and
encompasses the four processes of absorption, distribution, metabolism, and excretion (ADME).
Pharmacodynamics describes "what the drug does to the body"—the biochemical and
physiological effects of drugs and their mechanisms of action. This distinction is fundamental to
understanding drug therapy and is a core concept tested on the WGU D116 OA.
---
### Q2.
A patient with liver cirrhosis is prescribed propranolol. The APRN understands that the oral
bioavailability of this drug will be significantly increased due to which pharmacokinetic
phenomenon?
A) Increased volume of distribution
B) Decreased first-pass metabolism
C) Enhanced renal tubular secretion
D) Increased plasma protein binding
**Correct Answer: B**
**Rationale:** Propranolol undergoes extensive first-pass hepatic metabolism. In cirrhosis,
reduced hepatic blood flow and decreased enzyme activity reduce first-pass extraction, thereby
increasing oral bioavailability. This is a classic example of how hepatic impairment alters
pharmacokinetics.
---
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### Q3.
The "first-pass effect" refers to:
A) Rapid intravenous administration of a medication
B) Drug metabolism in the liver before reaching systemic circulation
C) Drug excretion by the kidneys before distribution
D) Drug binding to plasma proteins after absorption
**Correct Answer: B**
**Rationale:** The first-pass effect occurs when orally administered drugs are metabolized
in the liver before reaching systemic circulation, reducing bioavailability. Drugs such as
nitroglycerin and morphine require higher oral doses or alternative routes to bypass this effect.
Intravenous administration completely bypasses first-pass metabolism.
---
### Q4.
Bioavailability is defined as:
A) The speed at which a drug is absorbed
B) The fraction of an administered dose that reaches systemic circulation unchanged
C) The volume of distribution of a drug
D) The half-life of a drug
**Correct Answer: B**
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**Rationale:** Bioavailability measures the proportion of an administered drug dose that
reaches the systemic circulation in unchanged form. Intravenous administration has 100%
bioavailability because it bypasses absorption and first-pass metabolism. Oral bioavailability is
reduced by first-pass metabolism and incomplete absorption.
---
### Q5.
Which route of administration has the highest bioavailability and fastest onset of action?
A) Oral
B) Subcutaneous
C) Intravenous (IV)
D) Intramuscular (IM)
**Correct Answer: C**
**Rationale:** Intravenous administration delivers 100% of the dose directly into systemic
circulation, bypassing absorption barriers and first-pass metabolism. It provides the most rapid
onset of action and is the preferred route in emergencies requiring immediate drug effect.
---
### Q6.
A drug with a pKa of 4.5 is administered to a patient with a gastric pH of 2.0. Which statement
best describes the drug's absorption?
A) The drug will be mostly ionized and poorly absorbed
WGU D116 ADVANCED PHARMACOLOGY
FINAL EXAM OBJECTIVE ASSESSMENT &
PRACTICE QUESTION BANK WITH 500+
# SECTION 1: PHARMACOKINETICS & PHARMACODYNAMICS
## 1.1 Drug Absorption
### Q1.
Which of the following best describes the difference between pharmacokinetics and
pharmacodynamics?
A) Pharmacokinetics is what the drug does to the body; pharmacodynamics is what the body
does to the drug
B) Pharmacokinetics is what the body does to the drug; pharmacodynamics is what the drug does
to the body
C) There is no meaningful difference between pharmacokinetics and pharmacodynamics
D) Pharmacokinetics involves drug efficacy; pharmacodynamics involves drug metabolism
**Correct Answer: B**
, Page 2 of 326
**Rationale:** Pharmacokinetics describes "what the body does to the drug" and
encompasses the four processes of absorption, distribution, metabolism, and excretion (ADME).
Pharmacodynamics describes "what the drug does to the body"—the biochemical and
physiological effects of drugs and their mechanisms of action. This distinction is fundamental to
understanding drug therapy and is a core concept tested on the WGU D116 OA.
---
### Q2.
A patient with liver cirrhosis is prescribed propranolol. The APRN understands that the oral
bioavailability of this drug will be significantly increased due to which pharmacokinetic
phenomenon?
A) Increased volume of distribution
B) Decreased first-pass metabolism
C) Enhanced renal tubular secretion
D) Increased plasma protein binding
**Correct Answer: B**
**Rationale:** Propranolol undergoes extensive first-pass hepatic metabolism. In cirrhosis,
reduced hepatic blood flow and decreased enzyme activity reduce first-pass extraction, thereby
increasing oral bioavailability. This is a classic example of how hepatic impairment alters
pharmacokinetics.
---
, Page 3 of 326
### Q3.
The "first-pass effect" refers to:
A) Rapid intravenous administration of a medication
B) Drug metabolism in the liver before reaching systemic circulation
C) Drug excretion by the kidneys before distribution
D) Drug binding to plasma proteins after absorption
**Correct Answer: B**
**Rationale:** The first-pass effect occurs when orally administered drugs are metabolized
in the liver before reaching systemic circulation, reducing bioavailability. Drugs such as
nitroglycerin and morphine require higher oral doses or alternative routes to bypass this effect.
Intravenous administration completely bypasses first-pass metabolism.
---
### Q4.
Bioavailability is defined as:
A) The speed at which a drug is absorbed
B) The fraction of an administered dose that reaches systemic circulation unchanged
C) The volume of distribution of a drug
D) The half-life of a drug
**Correct Answer: B**
, Page 4 of 326
**Rationale:** Bioavailability measures the proportion of an administered drug dose that
reaches the systemic circulation in unchanged form. Intravenous administration has 100%
bioavailability because it bypasses absorption and first-pass metabolism. Oral bioavailability is
reduced by first-pass metabolism and incomplete absorption.
---
### Q5.
Which route of administration has the highest bioavailability and fastest onset of action?
A) Oral
B) Subcutaneous
C) Intravenous (IV)
D) Intramuscular (IM)
**Correct Answer: C**
**Rationale:** Intravenous administration delivers 100% of the dose directly into systemic
circulation, bypassing absorption barriers and first-pass metabolism. It provides the most rapid
onset of action and is the preferred route in emergencies requiring immediate drug effect.
---
### Q6.
A drug with a pKa of 4.5 is administered to a patient with a gastric pH of 2.0. Which statement
best describes the drug's absorption?
A) The drug will be mostly ionized and poorly absorbed
