NUR210 Exam 1: Principles of Pharmacology Questions and Answers
and Explanations | Latest- Galen
1. Which phase of pharmacokinetics involves the movement of a drug from its
site of administration into the bloodstream?
A. Distribution
B. Absorption
C. Metabolism
D. Excretion
Answer: B
Explanation: Absorption is the process by which a drug moves from the site of
administration into the blood.
2. The ‘first-pass effect’ refers to the metabolism of a drug in which organ
before it reaches systemic circulation?
A. Kidneys
B. Lungs
C. Small Intestine
D. Liver
Answer: D
,Explanation: The first-pass effect occurs when a drug is metabolized by the liver after
being absorbed from the GI tract but before reaching the rest of the body.
3. Which route of administration provides the fastest onset of action?
A. Oral
B. Intravenous
C. Intramuscular
D. Subcutaneous
Answer: B
Explanation: Intravenous (IV) administration places the drug directly into the
bloodstream, bypassing absorption barriers.
4. What term describes the study of what the drug does to the body?
A. Pharmacodynamics
B. Pharmacokinetics
C. Pharmacotherapeutics
D. Pharmacognosy
Answer: A
Explanation: Pharmacodynamics is the study of the biochemical and physiological effects
of drugs on the body.
,5. A drug that binds to a receptor and produces a maximum response is known
as a(n):
A. Antagonist
B. Agonist
C. Partial Agonist
D. Inhibitor
Answer: B
Explanation: An agonist is a drug that binds to and stimulates a receptor to produce a
biological response.
6. If a drug has a half-life of 4 hours, what percentage of the drug will remain in
the body after 8 hours?
A. 50%
B. 25%
C. 12.5%
D. 0%
Answer: B
Explanation: After one half-life (4 hours), 50% remains. After two half-lives (8 hours),
25% remains.
, 7. Which serum protein is most commonly involved in drug binding?
A. Hemoglobin
B. Globulin
C. Fibrinogen
D. Albumin
Answer: D
Explanation: Albumin is the most prevalent protein in the plasma and is the most
important protein to which drugs bind.
8. What is the primary site for drug excretion?
A. Kidneys
B. Skin
C. Lungs
D. Liver
Answer: A
Explanation: While drugs can be excreted through various routes, the kidneys are the
primary organs responsible for drug elimination.
9. A drug with a narrow therapeutic index:
A. Is very safe to administer
B. Has a high margin of safety
C. Requires close monitoring of blood levels
and Explanations | Latest- Galen
1. Which phase of pharmacokinetics involves the movement of a drug from its
site of administration into the bloodstream?
A. Distribution
B. Absorption
C. Metabolism
D. Excretion
Answer: B
Explanation: Absorption is the process by which a drug moves from the site of
administration into the blood.
2. The ‘first-pass effect’ refers to the metabolism of a drug in which organ
before it reaches systemic circulation?
A. Kidneys
B. Lungs
C. Small Intestine
D. Liver
Answer: D
,Explanation: The first-pass effect occurs when a drug is metabolized by the liver after
being absorbed from the GI tract but before reaching the rest of the body.
3. Which route of administration provides the fastest onset of action?
A. Oral
B. Intravenous
C. Intramuscular
D. Subcutaneous
Answer: B
Explanation: Intravenous (IV) administration places the drug directly into the
bloodstream, bypassing absorption barriers.
4. What term describes the study of what the drug does to the body?
A. Pharmacodynamics
B. Pharmacokinetics
C. Pharmacotherapeutics
D. Pharmacognosy
Answer: A
Explanation: Pharmacodynamics is the study of the biochemical and physiological effects
of drugs on the body.
,5. A drug that binds to a receptor and produces a maximum response is known
as a(n):
A. Antagonist
B. Agonist
C. Partial Agonist
D. Inhibitor
Answer: B
Explanation: An agonist is a drug that binds to and stimulates a receptor to produce a
biological response.
6. If a drug has a half-life of 4 hours, what percentage of the drug will remain in
the body after 8 hours?
A. 50%
B. 25%
C. 12.5%
D. 0%
Answer: B
Explanation: After one half-life (4 hours), 50% remains. After two half-lives (8 hours),
25% remains.
, 7. Which serum protein is most commonly involved in drug binding?
A. Hemoglobin
B. Globulin
C. Fibrinogen
D. Albumin
Answer: D
Explanation: Albumin is the most prevalent protein in the plasma and is the most
important protein to which drugs bind.
8. What is the primary site for drug excretion?
A. Kidneys
B. Skin
C. Lungs
D. Liver
Answer: A
Explanation: While drugs can be excreted through various routes, the kidneys are the
primary organs responsible for drug elimination.
9. A drug with a narrow therapeutic index:
A. Is very safe to administer
B. Has a high margin of safety
C. Requires close monitoring of blood levels
