NUR 210 Exam 3 Actual Questions and
Correct Answers (Verified Answers)
Already Graded A+ | New Update
2026/2027
Question 1
Which route of administration is most commonly associated with the 'first-pass effect'?
A) Intravenous
B) Oral
C) Sublingual
D) Intramuscular
Correct Answer: B) Oral
Rationale: Drugs administered orally are absorbed from the gastrointestinal tract and carried to
the liver via the hepatic portal vein, where they may be metabolized before reaching systemic
circulation. This reduces bioavailability. Intravenous, sublingual, and intramuscular routes
bypass first-pass metabolism.
Question 2
Which organ is primarily responsible for the metabolism of drugs in the human body?
A) Lungs
B) Kidneys
C) Liver
D) Small Intestine
Correct Answer: C) Liver
Rationale: The liver is the primary site of drug metabolism, utilizing enzymes such as the
cytochrome P450 system to chemically alter drugs. Liver dysfunction can increase drug
concentrations and toxicity.
Question 3
The time required for the concentration of a drug in the body to decrease by 50% is known as:
,A) Onset of action
B) Duration of action
C) Peak level
D) Half-life
Correct Answer: D) Half-life
Rationale: Half-life is a pharmacokinetic parameter that describes the time it takes for the
plasma concentration of a drug to be reduced by half. It determines dosing intervals and time to
steady state.
Question 4
A drug that binds to a receptor and produces a maximal biological response is called a(n):
A) Antagonist
B) Agonist
C) Partial agonist
D) Inhibitor
Correct Answer: B) Agonist
Rationale: An agonist is a molecule that mimics the action of a naturally occurring substance by
binding to a receptor and activating it to produce a response.
Question 5
What is the term for a drug that binds to a receptor but does not activate it, effectively blocking
other substances from binding?
A) Synergist
B) Antagonist
C) Agonist
D) Potentiator
Correct Answer: B) Antagonist
Rationale: Antagonists compete with agonists for receptor sites and prevent the agonist from
binding, thereby blocking its effect.
,Question 6
In a patient with low serum albumin levels, what is the primary risk concerning highly protein-
bound drugs?
A) Decreased drug efficacy
B) Increased risk of toxicity due to more free drug
C) Rapid excretion of the drug
D) Inability of the drug to reach the target site
Correct Answer: B) Increased risk of toxicity due to more free drug
Rationale: Drugs that are highly protein-bound need albumin to transport them. If albumin is
low, more of the drug remains 'free' or active, increasing the risk of toxicity.
Question 7
Under the Controlled Substances Act, drugs in which schedule have no accepted medical use
and a high potential for abuse?
A) Schedule V
B) Schedule I
C) Schedule III
D) Schedule II
Correct Answer: B) Schedule I
Rationale: Schedule I drugs are defined as having a high potential for abuse, no currently
accepted medical use in treatment, and a lack of accepted safety for use.
Question 8
Which term describes the study of what the drug does to the body?
A) Pharmacokinetics
B) Pharmacogenetics
C) Pharmacotherapeutics
D) Pharmacodynamics
Correct Answer: D) Pharmacodynamics
Rationale: Pharmacodynamics is the study of the biochemical and physiological effects of drugs
on the body and the mechanisms of their action.
, Question 9
A medication has a half-life of 6 hours. Approximately how long will it take to reach steady
state?
A) 6 hours
B) 12 hours
C) 24–30 hours
D) 60 hours
Correct Answer: C) 24–30 hours
Rationale: Steady state is typically achieved after 4–5 half-lives. With a half-life of 6 hours,
steady state will be reached in approximately 24–30 hours.
Question 10
Which of the following is TRUE about a drug with a narrow therapeutic index?
A) It has a wide margin of safety
B) It requires close monitoring of serum drug levels
C) It has no risk of toxicity
D) It can be administered without dose adjustment
Correct Answer: B) It requires close monitoring of serum drug levels
Rationale: Narrow therapeutic index drugs have a small margin between therapeutic and toxic
doses, requiring careful serum level monitoring. Examples include digoxin, lithium, warfarin, and
phenytoin.
Question 11
A patient with renal impairment is prescribed a drug that is primarily excreted by the kidneys.
What dose adjustment is typically required?
A) Increased dose
B) Decreased dose
C) No change in dose
D) More frequent dosing
Correct Answer: B) Decreased dose
Correct Answers (Verified Answers)
Already Graded A+ | New Update
2026/2027
Question 1
Which route of administration is most commonly associated with the 'first-pass effect'?
A) Intravenous
B) Oral
C) Sublingual
D) Intramuscular
Correct Answer: B) Oral
Rationale: Drugs administered orally are absorbed from the gastrointestinal tract and carried to
the liver via the hepatic portal vein, where they may be metabolized before reaching systemic
circulation. This reduces bioavailability. Intravenous, sublingual, and intramuscular routes
bypass first-pass metabolism.
Question 2
Which organ is primarily responsible for the metabolism of drugs in the human body?
A) Lungs
B) Kidneys
C) Liver
D) Small Intestine
Correct Answer: C) Liver
Rationale: The liver is the primary site of drug metabolism, utilizing enzymes such as the
cytochrome P450 system to chemically alter drugs. Liver dysfunction can increase drug
concentrations and toxicity.
Question 3
The time required for the concentration of a drug in the body to decrease by 50% is known as:
,A) Onset of action
B) Duration of action
C) Peak level
D) Half-life
Correct Answer: D) Half-life
Rationale: Half-life is a pharmacokinetic parameter that describes the time it takes for the
plasma concentration of a drug to be reduced by half. It determines dosing intervals and time to
steady state.
Question 4
A drug that binds to a receptor and produces a maximal biological response is called a(n):
A) Antagonist
B) Agonist
C) Partial agonist
D) Inhibitor
Correct Answer: B) Agonist
Rationale: An agonist is a molecule that mimics the action of a naturally occurring substance by
binding to a receptor and activating it to produce a response.
Question 5
What is the term for a drug that binds to a receptor but does not activate it, effectively blocking
other substances from binding?
A) Synergist
B) Antagonist
C) Agonist
D) Potentiator
Correct Answer: B) Antagonist
Rationale: Antagonists compete with agonists for receptor sites and prevent the agonist from
binding, thereby blocking its effect.
,Question 6
In a patient with low serum albumin levels, what is the primary risk concerning highly protein-
bound drugs?
A) Decreased drug efficacy
B) Increased risk of toxicity due to more free drug
C) Rapid excretion of the drug
D) Inability of the drug to reach the target site
Correct Answer: B) Increased risk of toxicity due to more free drug
Rationale: Drugs that are highly protein-bound need albumin to transport them. If albumin is
low, more of the drug remains 'free' or active, increasing the risk of toxicity.
Question 7
Under the Controlled Substances Act, drugs in which schedule have no accepted medical use
and a high potential for abuse?
A) Schedule V
B) Schedule I
C) Schedule III
D) Schedule II
Correct Answer: B) Schedule I
Rationale: Schedule I drugs are defined as having a high potential for abuse, no currently
accepted medical use in treatment, and a lack of accepted safety for use.
Question 8
Which term describes the study of what the drug does to the body?
A) Pharmacokinetics
B) Pharmacogenetics
C) Pharmacotherapeutics
D) Pharmacodynamics
Correct Answer: D) Pharmacodynamics
Rationale: Pharmacodynamics is the study of the biochemical and physiological effects of drugs
on the body and the mechanisms of their action.
, Question 9
A medication has a half-life of 6 hours. Approximately how long will it take to reach steady
state?
A) 6 hours
B) 12 hours
C) 24–30 hours
D) 60 hours
Correct Answer: C) 24–30 hours
Rationale: Steady state is typically achieved after 4–5 half-lives. With a half-life of 6 hours,
steady state will be reached in approximately 24–30 hours.
Question 10
Which of the following is TRUE about a drug with a narrow therapeutic index?
A) It has a wide margin of safety
B) It requires close monitoring of serum drug levels
C) It has no risk of toxicity
D) It can be administered without dose adjustment
Correct Answer: B) It requires close monitoring of serum drug levels
Rationale: Narrow therapeutic index drugs have a small margin between therapeutic and toxic
doses, requiring careful serum level monitoring. Examples include digoxin, lithium, warfarin, and
phenytoin.
Question 11
A patient with renal impairment is prescribed a drug that is primarily excreted by the kidneys.
What dose adjustment is typically required?
A) Increased dose
B) Decreased dose
C) No change in dose
D) More frequent dosing
Correct Answer: B) Decreased dose
