,NURS 6521 Week 1 Quiz | Advanced Pharmacology (2026)
Q&A | Walden University
1. Which of the following best describes the process by which a drug moves from its
administration site into the bloodstream?
A) Distribution
B) Metabolism
C) Absorption
D) Excretion
Correct Answer: Absorption
Rationale: Absorption is the process by which a drug moves from its site of
administration into the bloodstream. Distribution involves movement from the
bloodstream to tissues, metabolism involves chemical alteration, and excretion
involves elimination from the body. Understanding these processes is fundamental to
pharmacokinetics.
2. What is the primary organ responsible for drug metabolism in the human body?
A) Kidneys
B) Liver
C) Lungs
D) Spleen
Correct Answer: Liver
,Rationale: The liver is the primary organ for drug metabolism, utilizing cytochrome
P450 enzymes to convert drugs into more water-soluble substances for elimination.
The kidneys are primarily responsible for excretion, while the lungs and spleen play
minimal roles in metabolism. Hepatic impairment can significantly alter drug levels.
3. Which term refers to the movement of a drug from the bloodstream into body
tissues and organs?
A) Absorption
B) Distribution
C) Metabolism
D) Excretion
Correct Answer: Distribution
Rationale: Distribution describes the movement of a drug from the bloodstream into
tissues, organs, and cells where it exerts its therapeutic effects. Factors such as blood
flow, protein binding, and tissue permeability influence distribution. It is distinct from
absorption, metabolism, and excretion.
4. Which route of drug administration produces the most immediate and complete
bioavailability?
A) Oral
B) Intramuscular
C) Intravenous
D) Subcutaneous
Correct Answer: Intravenous
, Rationale: Intravenous administration delivers medication directly into systemic
circulation, producing immediate effects and 100% bioavailability. Oral
administration undergoes first-pass metabolism, while intramuscular and
subcutaneous routes require absorption from tissue sites. The intravenous route is
preferred in emergencies.
5. A patient has a blood serum drug level of 50 units/mL. The drug's half-life is 1
hour. If concentrations above 25 units/mL are toxic and no more drug is given, how
long will it take for the level to reach the nontoxic range?
A) 30 minutes
B) 1 hour
C) 2 hours
D) 4 hours
Correct Answer: 1 hour
Rationale: The half-life is the time required for the drug concentration to decrease
by 50%. With a level of 50 units/mL and a half-life of 1 hour, the level will fall to 25
units/mL after one half-life. Therefore, it takes 1 hour to reach the nontoxic range
(≤25 units/mL).
6. Which of the following statements best defines how a chemical becomes termed a
drug?
A) Any chemical that alters physiological function when ingested
B) A chemical that is prescribed by a licensed provider
C) A chemical that has been approved by the FDA
Q&A | Walden University
1. Which of the following best describes the process by which a drug moves from its
administration site into the bloodstream?
A) Distribution
B) Metabolism
C) Absorption
D) Excretion
Correct Answer: Absorption
Rationale: Absorption is the process by which a drug moves from its site of
administration into the bloodstream. Distribution involves movement from the
bloodstream to tissues, metabolism involves chemical alteration, and excretion
involves elimination from the body. Understanding these processes is fundamental to
pharmacokinetics.
2. What is the primary organ responsible for drug metabolism in the human body?
A) Kidneys
B) Liver
C) Lungs
D) Spleen
Correct Answer: Liver
,Rationale: The liver is the primary organ for drug metabolism, utilizing cytochrome
P450 enzymes to convert drugs into more water-soluble substances for elimination.
The kidneys are primarily responsible for excretion, while the lungs and spleen play
minimal roles in metabolism. Hepatic impairment can significantly alter drug levels.
3. Which term refers to the movement of a drug from the bloodstream into body
tissues and organs?
A) Absorption
B) Distribution
C) Metabolism
D) Excretion
Correct Answer: Distribution
Rationale: Distribution describes the movement of a drug from the bloodstream into
tissues, organs, and cells where it exerts its therapeutic effects. Factors such as blood
flow, protein binding, and tissue permeability influence distribution. It is distinct from
absorption, metabolism, and excretion.
4. Which route of drug administration produces the most immediate and complete
bioavailability?
A) Oral
B) Intramuscular
C) Intravenous
D) Subcutaneous
Correct Answer: Intravenous
, Rationale: Intravenous administration delivers medication directly into systemic
circulation, producing immediate effects and 100% bioavailability. Oral
administration undergoes first-pass metabolism, while intramuscular and
subcutaneous routes require absorption from tissue sites. The intravenous route is
preferred in emergencies.
5. A patient has a blood serum drug level of 50 units/mL. The drug's half-life is 1
hour. If concentrations above 25 units/mL are toxic and no more drug is given, how
long will it take for the level to reach the nontoxic range?
A) 30 minutes
B) 1 hour
C) 2 hours
D) 4 hours
Correct Answer: 1 hour
Rationale: The half-life is the time required for the drug concentration to decrease
by 50%. With a level of 50 units/mL and a half-life of 1 hour, the level will fall to 25
units/mL after one half-life. Therefore, it takes 1 hour to reach the nontoxic range
(≤25 units/mL).
6. Which of the following statements best defines how a chemical becomes termed a
drug?
A) Any chemical that alters physiological function when ingested
B) A chemical that is prescribed by a licensed provider
C) A chemical that has been approved by the FDA
