NURS 8024 TEST 3 STUDY GUIDE |
QUESTIONS AND ANSWERS | 2026
UPDATE | WITH COMPLETE
SOLUTIONS.
SECTION 1: PHARMACOKINETICS AND
PHARMACODYNAMICS
Question 1
The four factors that affect pharmacokinetics (DAME) are:
A) Dosage, administration, metabolism, excretion
B) Distribution, absorption, metabolism, excretion
C) Digestion, absorption, metabolism, elimination
D) Distribution, action, metabolism, excretion
Rationale: The four factors affecting pharmacokinetics are Distribution, Absorption,
Metabolism, and Excretion (DAME). These processes determine drug concentration at
the site of action.
Question 2
,Which type of drug molecule is most easily absorbed?
A) Large, hydrophilic molecules
B) Small, lipophilic molecules
C) Large, lipophilic molecules
D) Small, hydrophilic molecules
Rationale: Smaller, lipophilic (lipid-soluble) molecules more easily cross cell membranes
and are absorbed more readily. Hydrophilic molecules do not easily pass through cell
membranes.
Question 3
The volume of distribution (Vd) is defined as:
A) The actual volume of blood in the body
B) A hypothetical volume into which a drug is dispersed
C) The amount of drug in the plasma
D) The rate of drug elimination
Rationale: Volume of distribution is a hypothetical volume into which a drug is
dispersed. It represents the relationship between the amount of drug in the body and
the concentration of drug in the plasma.
Question 4
The half-life (t½) of a drug is defined as:
A) The time required for the drug to reach peak concentration
B) The time required for the drug concentration to decrease by 50%
C) The time required for the drug to be completely eliminated
D) The time required for the drug to be absorbed
Rationale: Half-life is the time required for the plasma concentration of a drug to
decrease by 50%. It determines the dosing interval and time to reach steady state.
, Question 5
The therapeutic window is defined as:
A) The time between drug administration and peak effect
B) The desired drug response without toxicity
C) The total amount of drug in the body
D) The time between doses
Rationale: The therapeutic window is between the mean effective concentration for
desired response and the mean effective concentration for adverse response—the range
where the drug is effective without toxicity.
Question 6
Drugs with a narrow therapeutic index require monitoring of:
A) Blood pressure only
B) Serum drug levels
C) Liver function only
D) Renal function only
Rationale: Drugs with a narrow therapeutic index (e.g., digoxin, lithium, warfarin,
phenytoin, aminoglycosides) require serum drug level monitoring because the margin
between the minimum effective concentration and toxic concentration is small.
Question 7
The cytochrome P450 (CYP450) enzyme system is primarily involved in:
A) Drug absorption
B) Drug distribution
QUESTIONS AND ANSWERS | 2026
UPDATE | WITH COMPLETE
SOLUTIONS.
SECTION 1: PHARMACOKINETICS AND
PHARMACODYNAMICS
Question 1
The four factors that affect pharmacokinetics (DAME) are:
A) Dosage, administration, metabolism, excretion
B) Distribution, absorption, metabolism, excretion
C) Digestion, absorption, metabolism, elimination
D) Distribution, action, metabolism, excretion
Rationale: The four factors affecting pharmacokinetics are Distribution, Absorption,
Metabolism, and Excretion (DAME). These processes determine drug concentration at
the site of action.
Question 2
,Which type of drug molecule is most easily absorbed?
A) Large, hydrophilic molecules
B) Small, lipophilic molecules
C) Large, lipophilic molecules
D) Small, hydrophilic molecules
Rationale: Smaller, lipophilic (lipid-soluble) molecules more easily cross cell membranes
and are absorbed more readily. Hydrophilic molecules do not easily pass through cell
membranes.
Question 3
The volume of distribution (Vd) is defined as:
A) The actual volume of blood in the body
B) A hypothetical volume into which a drug is dispersed
C) The amount of drug in the plasma
D) The rate of drug elimination
Rationale: Volume of distribution is a hypothetical volume into which a drug is
dispersed. It represents the relationship between the amount of drug in the body and
the concentration of drug in the plasma.
Question 4
The half-life (t½) of a drug is defined as:
A) The time required for the drug to reach peak concentration
B) The time required for the drug concentration to decrease by 50%
C) The time required for the drug to be completely eliminated
D) The time required for the drug to be absorbed
Rationale: Half-life is the time required for the plasma concentration of a drug to
decrease by 50%. It determines the dosing interval and time to reach steady state.
, Question 5
The therapeutic window is defined as:
A) The time between drug administration and peak effect
B) The desired drug response without toxicity
C) The total amount of drug in the body
D) The time between doses
Rationale: The therapeutic window is between the mean effective concentration for
desired response and the mean effective concentration for adverse response—the range
where the drug is effective without toxicity.
Question 6
Drugs with a narrow therapeutic index require monitoring of:
A) Blood pressure only
B) Serum drug levels
C) Liver function only
D) Renal function only
Rationale: Drugs with a narrow therapeutic index (e.g., digoxin, lithium, warfarin,
phenytoin, aminoglycosides) require serum drug level monitoring because the margin
between the minimum effective concentration and toxic concentration is small.
Question 7
The cytochrome P450 (CYP450) enzyme system is primarily involved in:
A) Drug absorption
B) Drug distribution
