RELIAS RN PHARMACOLOGY EXAM
QUESTIONS & CORRECT ANSWERS WITH
RATIONALES FOR YEAR 2026/2027
**Q1: Which pharmacokinetic phase involves the movement of a
drug from systemic circulation to target tissues?**
- A. Absorption
- B. Distribution
- C. Metabolism
- D. Excretion
**Answer: B. Distribution**
**Rationale:** Distribution refers to the transport of a drug by the
bloodstream to its site of action, storage sites, and organs of
elimination. Absorption concerns drug entry into circulation,
metabolism involves biotransformation, and excretion removes
substances from the body .
---
**Q2: Which organ is primarily responsible for the first-pass effect
when drugs are administered orally?**
- A. Kidneys
- B. Liver
,- C. Lungs
- D. Stomach
**Answer: B. Liver**
**Rationale:** The liver is the primary site of first-pass metabolism.
Orally administered drugs are absorbed through the GI tract and
delivered directly to the liver via the portal vein before reaching
systemic circulation, where they are heavily metabolized .
---
**Q3: What does a drug's bioavailability measure?**
- A. The rate at which a drug is excreted
- B. The fraction of an administered drug that reaches systemic
circulation
- C. The protein-binding capacity of a drug
- D. The volume of drug distributed in the body
**Answer: B. The fraction of an administered drug that reaches
systemic circulation**
**Rationale:** Bioavailability is defined as the fraction or percentage
of an administered drug dose that enters the systemic bloodstream
in an unchanged, active form .
,---
**Q4: A drug with a very large Volume of Distribution (Vd) primarily
indicates that it is concentrated in:**
- A. Blood plasma
- B. Extracellular fluid
- C. Adipose tissue and other extravascular spaces
- D. Bone marrow
**Answer: C. Adipose tissue and other extravascular spaces**
**Rationale:** A large Volume of Distribution means the drug
concentration in the plasma is very low, confirming the drug has
distributed deeply into peripheral tissues rather than remaining in
the blood .
---
**Q5: Which route of administration has the fastest onset of
action?**
- A. Oral
- B. Subcutaneous
- C. Intramuscular
- D. Intravenous
, **Answer: D. Intravenous**
**Rationale:** IV administration delivers medication directly into
systemic circulation, achieving the fastest onset of action as it
bypasses absorption barriers and first-pass metabolism .
---
**Q6: What does a drug's half-life represent?**
- A. The time it takes for the drug to produce its effect
- B. The time required for plasma concentration to decrease by half
- C. The duration of action of the drug
- D. The time until the drug is completely eliminated
**Answer: B. The time required for plasma concentration to decrease
by half**
**Rationale:** Half-life describes elimination kinetics—the time
required for the plasma concentration of a drug to decrease by half.
Duration of action depends on pharmacodynamic factors and active
metabolites .
---
**Q7: Which plasma protein primarily binds to acidic drugs in the
bloodstream?**
QUESTIONS & CORRECT ANSWERS WITH
RATIONALES FOR YEAR 2026/2027
**Q1: Which pharmacokinetic phase involves the movement of a
drug from systemic circulation to target tissues?**
- A. Absorption
- B. Distribution
- C. Metabolism
- D. Excretion
**Answer: B. Distribution**
**Rationale:** Distribution refers to the transport of a drug by the
bloodstream to its site of action, storage sites, and organs of
elimination. Absorption concerns drug entry into circulation,
metabolism involves biotransformation, and excretion removes
substances from the body .
---
**Q2: Which organ is primarily responsible for the first-pass effect
when drugs are administered orally?**
- A. Kidneys
- B. Liver
,- C. Lungs
- D. Stomach
**Answer: B. Liver**
**Rationale:** The liver is the primary site of first-pass metabolism.
Orally administered drugs are absorbed through the GI tract and
delivered directly to the liver via the portal vein before reaching
systemic circulation, where they are heavily metabolized .
---
**Q3: What does a drug's bioavailability measure?**
- A. The rate at which a drug is excreted
- B. The fraction of an administered drug that reaches systemic
circulation
- C. The protein-binding capacity of a drug
- D. The volume of drug distributed in the body
**Answer: B. The fraction of an administered drug that reaches
systemic circulation**
**Rationale:** Bioavailability is defined as the fraction or percentage
of an administered drug dose that enters the systemic bloodstream
in an unchanged, active form .
,---
**Q4: A drug with a very large Volume of Distribution (Vd) primarily
indicates that it is concentrated in:**
- A. Blood plasma
- B. Extracellular fluid
- C. Adipose tissue and other extravascular spaces
- D. Bone marrow
**Answer: C. Adipose tissue and other extravascular spaces**
**Rationale:** A large Volume of Distribution means the drug
concentration in the plasma is very low, confirming the drug has
distributed deeply into peripheral tissues rather than remaining in
the blood .
---
**Q5: Which route of administration has the fastest onset of
action?**
- A. Oral
- B. Subcutaneous
- C. Intramuscular
- D. Intravenous
, **Answer: D. Intravenous**
**Rationale:** IV administration delivers medication directly into
systemic circulation, achieving the fastest onset of action as it
bypasses absorption barriers and first-pass metabolism .
---
**Q6: What does a drug's half-life represent?**
- A. The time it takes for the drug to produce its effect
- B. The time required for plasma concentration to decrease by half
- C. The duration of action of the drug
- D. The time until the drug is completely eliminated
**Answer: B. The time required for plasma concentration to decrease
by half**
**Rationale:** Half-life describes elimination kinetics—the time
required for the plasma concentration of a drug to decrease by half.
Duration of action depends on pharmacodynamic factors and active
metabolites .
---
**Q7: Which plasma protein primarily binds to acidic drugs in the
bloodstream?**
