NURS 5334 Advanced Pharmacology Exam 1 | Questions and
Answers + Rationales | 2026/27 Updates | 100% Correct | UTA
Which of the following best distinguishes pharmacodynamics from pharmacokinetics?
A) Pharmacodynamics is what the body does to the drug; pharmacokinetics is what the drug
does to the body.
B) Pharmacodynamics is the study of drug absorption and distribution; pharmacokinetics is the
study of drug metabolism and excretion.
C) Pharmacodynamics is what the drug does to the body; pharmacokinetics is what the body
does to the drug.
D) Pharmacodynamics only involves receptor binding; pharmacokinetics only involves drug
movement across membranes.
Correct Answer: Pharmacodynamics is what the drug does to the body; pharmacokinetics is
what the body does to the drug.
Rationale: Pharmacodynamics describes the biochemical and physiologic effects of drugs and
their mechanisms of action—what the drug does to the body. Pharmacokinetics refers to the
processes of absorption, distribution, metabolism, and excretion (ADME)—what the body does
to the drug. This foundational distinction is essential for understanding drug action.
The four major pharmacokinetic processes are:
A) Absorption, Digestion, Metabolism, and Excretion
B) Administration, Distribution, Metabolism, and Elimination
C) Absorption, Distribution, Metabolism, and Excretion
D) Absorption, Distribution, Metabolism, and Elimination
Correct Answer: Absorption, Distribution, Metabolism, and Excretion
,Rationale: The four major pharmacokinetic processes are Absorption, Distribution, Metabolism,
and Excretion (ADME). These processes determine the concentration of a drug at its sites of
action over time and help predict onset, peak duration, and elimination. Digestion and
administration are not standard components of the ADME framework.
A drug reaches steady-state concentration in approximately:
A) Two half-lives
B) Three half-lives
C) Four half-lives
D) Five half-lives
Correct Answer: Five half-lives
Rationale: Steady-state is reached after approximately 4-5 half-lives, with about 94% of steady
state reached after four half-lives and more than 97% after five half-lives. This principle
determines dosing intervals and the time to therapeutic effect, making it crucial for clinical
prescribing.
A patient is prescribed a drug with a half-life of 12 hours. How long will it take to reach steady-
state concentration with regular dosing?
A) 12 hours
B) 24 hours
C) 48 hours
D) 60 hours
Correct Answer: 60 hours
,Rationale: Steady-state is reached after approximately 5 half-lives. Five multiplied by 12 hours
equals 60 hours. This calculation is essential for predicting when a drug will reach its full
therapeutic effect and for planning appropriate monitoring intervals.
What is bioavailability?
A) The amount of drug bound to plasma proteins
B) The fraction of an administered dose that reaches systemic circulation unchanged
C) The time required for drug concentration to decrease by half
D) The volume of plasma cleared of drug per unit time
Correct Answer: The fraction of an administered dose that reaches systemic circulation
unchanged
Rationale: Bioavailability (F) is the fraction of an administered dose that reaches systemic
circulation in its active form. Intravenous administration has 100% bioavailability because the
drug is directly placed into circulation. Oral drugs may have lower bioavailability due to
incomplete absorption or first-pass hepatic metabolism.
The half-life of a drug is best defined as:
A) Time for drug concentration to peak
B) Time for drug concentration to decrease by half
C) Time for complete drug elimination
D) Time to reach steady state
Correct Answer: Time for drug concentration to decrease by half
Rationale: Half-life (t½) is the time required for the plasma concentration of a drug to decrease
by 50%. It determines dosing frequency and time to reach steady state (4-5 half-lives). Half-life
, depends on volume of distribution and clearance, making it a key clinical parameter for dosing
intervals.
What is the therapeutic range?
A) The maximum dose that can be safely administered
B) The plasma drug concentration between the minimum effective concentration and the toxic
concentration
C) The total amount of drug in the body
D) The time between doses
Correct Answer: The plasma drug concentration between the minimum effective concentration
and the toxic concentration
Rationale: The therapeutic range is the plasma drug concentration between the minimum
effective concentration (MEC) and the toxic concentration. Keeping drug levels within this range
maximizes therapeutic benefit while minimizing adverse effects. A wider therapeutic range
indicates a safer drug that is easier to manage clinically.
Volume of distribution (Vd) is defined as:
A) The actual anatomical volume of the body
B) The theoretical volume that would be necessary to contain the total amount of drug at the
measured concentration
C) The volume of plasma cleared of drug per unit time
D) The fraction of drug bound to plasma proteins
Correct Answer: The theoretical volume that would be necessary to contain the total amount of
drug at the measured concentration
Answers + Rationales | 2026/27 Updates | 100% Correct | UTA
Which of the following best distinguishes pharmacodynamics from pharmacokinetics?
A) Pharmacodynamics is what the body does to the drug; pharmacokinetics is what the drug
does to the body.
B) Pharmacodynamics is the study of drug absorption and distribution; pharmacokinetics is the
study of drug metabolism and excretion.
C) Pharmacodynamics is what the drug does to the body; pharmacokinetics is what the body
does to the drug.
D) Pharmacodynamics only involves receptor binding; pharmacokinetics only involves drug
movement across membranes.
Correct Answer: Pharmacodynamics is what the drug does to the body; pharmacokinetics is
what the body does to the drug.
Rationale: Pharmacodynamics describes the biochemical and physiologic effects of drugs and
their mechanisms of action—what the drug does to the body. Pharmacokinetics refers to the
processes of absorption, distribution, metabolism, and excretion (ADME)—what the body does
to the drug. This foundational distinction is essential for understanding drug action.
The four major pharmacokinetic processes are:
A) Absorption, Digestion, Metabolism, and Excretion
B) Administration, Distribution, Metabolism, and Elimination
C) Absorption, Distribution, Metabolism, and Excretion
D) Absorption, Distribution, Metabolism, and Elimination
Correct Answer: Absorption, Distribution, Metabolism, and Excretion
,Rationale: The four major pharmacokinetic processes are Absorption, Distribution, Metabolism,
and Excretion (ADME). These processes determine the concentration of a drug at its sites of
action over time and help predict onset, peak duration, and elimination. Digestion and
administration are not standard components of the ADME framework.
A drug reaches steady-state concentration in approximately:
A) Two half-lives
B) Three half-lives
C) Four half-lives
D) Five half-lives
Correct Answer: Five half-lives
Rationale: Steady-state is reached after approximately 4-5 half-lives, with about 94% of steady
state reached after four half-lives and more than 97% after five half-lives. This principle
determines dosing intervals and the time to therapeutic effect, making it crucial for clinical
prescribing.
A patient is prescribed a drug with a half-life of 12 hours. How long will it take to reach steady-
state concentration with regular dosing?
A) 12 hours
B) 24 hours
C) 48 hours
D) 60 hours
Correct Answer: 60 hours
,Rationale: Steady-state is reached after approximately 5 half-lives. Five multiplied by 12 hours
equals 60 hours. This calculation is essential for predicting when a drug will reach its full
therapeutic effect and for planning appropriate monitoring intervals.
What is bioavailability?
A) The amount of drug bound to plasma proteins
B) The fraction of an administered dose that reaches systemic circulation unchanged
C) The time required for drug concentration to decrease by half
D) The volume of plasma cleared of drug per unit time
Correct Answer: The fraction of an administered dose that reaches systemic circulation
unchanged
Rationale: Bioavailability (F) is the fraction of an administered dose that reaches systemic
circulation in its active form. Intravenous administration has 100% bioavailability because the
drug is directly placed into circulation. Oral drugs may have lower bioavailability due to
incomplete absorption or first-pass hepatic metabolism.
The half-life of a drug is best defined as:
A) Time for drug concentration to peak
B) Time for drug concentration to decrease by half
C) Time for complete drug elimination
D) Time to reach steady state
Correct Answer: Time for drug concentration to decrease by half
Rationale: Half-life (t½) is the time required for the plasma concentration of a drug to decrease
by 50%. It determines dosing frequency and time to reach steady state (4-5 half-lives). Half-life
, depends on volume of distribution and clearance, making it a key clinical parameter for dosing
intervals.
What is the therapeutic range?
A) The maximum dose that can be safely administered
B) The plasma drug concentration between the minimum effective concentration and the toxic
concentration
C) The total amount of drug in the body
D) The time between doses
Correct Answer: The plasma drug concentration between the minimum effective concentration
and the toxic concentration
Rationale: The therapeutic range is the plasma drug concentration between the minimum
effective concentration (MEC) and the toxic concentration. Keeping drug levels within this range
maximizes therapeutic benefit while minimizing adverse effects. A wider therapeutic range
indicates a safer drug that is easier to manage clinically.
Volume of distribution (Vd) is defined as:
A) The actual anatomical volume of the body
B) The theoretical volume that would be necessary to contain the total amount of drug at the
measured concentration
C) The volume of plasma cleared of drug per unit time
D) The fraction of drug bound to plasma proteins
Correct Answer: The theoretical volume that would be necessary to contain the total amount of
drug at the measured concentration
