NR 565 MIDTERM SUCCESS: COMPLETE
PHARMACOLOGY QUESTIONS BANK WITH
VERIFIED ANSWERS AND DETAILED
RATIONALES |ALREADY GRADED A+ |
NEWEST
SECTION A: FOUNDATIONS IN PHARMACOLOGY
Question 1
An APRN with full practice authority in her state is seeing a new patient in an
independent clinic. Which activity is most consistent with full practice
authority?
A) Prescribing legend drugs only under a physician's cosignature
B) Ordering and interpreting diagnostic tests without mandated physician oversight
C) Prescribing only Schedule IV–V drugs with monthly chart review by a physician
D) Providing health education but not initiating pharmacologic treatment
Correct answer: B
Rationale: Full practice authority allows APRNs to evaluate patients, diagnose, order
and interpret tests, and initiate and manage treatments, including prescribing
medications and controlled substances, without mandated supervisory requirements
at the point of care. Prescriptive authority is determined by state law under the
jurisdiction of health professional boards (State Board of Nursing, Board of Medicine,
or Board of Pharmacy) .
Question 2
What is pharmacokinetics?
A) The study of what the drug does to the body
B) The process by which drugs are absorbed, distributed, metabolized, and excreted
,C) The study of drug receptors and their interactions
D) The mechanism of drug action at the cellular level
Correct answer: B
Rationale: Pharmacokinetics describes the movement of drugs through the body
over time, encompassing the four processes of absorption, distribution, metabolism,
and excretion (ADME). Pharmacodynamics refers to what the drug does to the body,
including receptor interactions and mechanisms of action .
Question 3
What is the function of Cytochrome P450 (CYP450)?
A) To transport drugs across cell membranes
B) To metabolize xenobiotics and detoxify chemicals
C) To produce antibodies against foreign substances
D) To regulate drug excretion by the kidneys
Correct answer: B
Rationale: CYP450 enzymes are responsible for Phase 1 metabolism, during which
drugs are oxidized, reduced, or hydrolyzed to prepare them for elimination. This is a
critical pathway for drug metabolism and drug-drug interactions .
Question 4
A medication with a narrow therapeutic index requires careful monitoring
because:
A) It is rapidly absorbed
B) Toxicity can occur with small dosage changes
C) It has a long half-life
D) It is poorly distributed
Correct answer: B
,Rationale: Narrow therapeutic index drugs (e.g., warfarin, digoxin, lithium) have a
small margin between therapeutic and toxic doses. Even small dosage changes can
lead to toxicity or subtherapeutic effects .
Question 5
A patient is prescribed a medication that is known to be highly protein bound.
Which change would most likely increase free drug levels and risk of toxicity?
A) Increased renal blood flow
B) Decreased serum albumin
C) Increased hepatic blood flow
D) Increased gastric pH
Correct answer: B
Rationale: Drugs bound to albumin remain in the bloodstream and are inactive. In
hypoalbuminemia (decreased serum albumin), fewer binding sites are available,
increasing the free (active) drug concentration and risk of adverse effects. This is
particularly important in older adults, malnourished patients, and those with liver
disease .
Question 6
What occurs during Phase 1 metabolism of drugs via CYP450?
A) Drugs are conjugated to increase water solubility
B) Drugs are oxidized, reduced, or hydrolyzed
C) Drugs are excreted unchanged
D) Drugs are bound to plasma proteins
Correct answer: B
Rationale: Phase 1 metabolism involves oxidation, reduction, or hydrolysis reactions,
typically mediated by the CYP450 enzyme system. These reactions prepare drugs for
Phase 2 conjugation reactions .
, Question 7
What occurs during Phase 2 metabolism of drugs?
A) Oxidation and reduction reactions
B) Conjugation reactions (e.g., glucuronidation, sulfation)
C) Drug absorption from the GI tract
D) Drug distribution to tissues
Correct answer: B
Rationale: Phase 2 metabolism involves conjugation reactions that increase water
solubility, facilitating renal excretion. Examples include glucuronidation, sulfation, and
acetylation .
Question 8
The time required for half of a drug concentration to be eliminated from the
body is called:
A) Peak level
B) Bioavailability
C) Half-life
D) Potency
Correct answer: C
Rationale: Half-life determines dosing intervals and the time required to reach
steady state. A drug typically reaches steady state after approximately four to five
half-lives .
SECTION B: PRESCRIPTIVE AUTHORITY & REGULATORY
CONSIDERATIONS
Question 9
Who determines and regulates prescriptive authority for APRNs?
PHARMACOLOGY QUESTIONS BANK WITH
VERIFIED ANSWERS AND DETAILED
RATIONALES |ALREADY GRADED A+ |
NEWEST
SECTION A: FOUNDATIONS IN PHARMACOLOGY
Question 1
An APRN with full practice authority in her state is seeing a new patient in an
independent clinic. Which activity is most consistent with full practice
authority?
A) Prescribing legend drugs only under a physician's cosignature
B) Ordering and interpreting diagnostic tests without mandated physician oversight
C) Prescribing only Schedule IV–V drugs with monthly chart review by a physician
D) Providing health education but not initiating pharmacologic treatment
Correct answer: B
Rationale: Full practice authority allows APRNs to evaluate patients, diagnose, order
and interpret tests, and initiate and manage treatments, including prescribing
medications and controlled substances, without mandated supervisory requirements
at the point of care. Prescriptive authority is determined by state law under the
jurisdiction of health professional boards (State Board of Nursing, Board of Medicine,
or Board of Pharmacy) .
Question 2
What is pharmacokinetics?
A) The study of what the drug does to the body
B) The process by which drugs are absorbed, distributed, metabolized, and excreted
,C) The study of drug receptors and their interactions
D) The mechanism of drug action at the cellular level
Correct answer: B
Rationale: Pharmacokinetics describes the movement of drugs through the body
over time, encompassing the four processes of absorption, distribution, metabolism,
and excretion (ADME). Pharmacodynamics refers to what the drug does to the body,
including receptor interactions and mechanisms of action .
Question 3
What is the function of Cytochrome P450 (CYP450)?
A) To transport drugs across cell membranes
B) To metabolize xenobiotics and detoxify chemicals
C) To produce antibodies against foreign substances
D) To regulate drug excretion by the kidneys
Correct answer: B
Rationale: CYP450 enzymes are responsible for Phase 1 metabolism, during which
drugs are oxidized, reduced, or hydrolyzed to prepare them for elimination. This is a
critical pathway for drug metabolism and drug-drug interactions .
Question 4
A medication with a narrow therapeutic index requires careful monitoring
because:
A) It is rapidly absorbed
B) Toxicity can occur with small dosage changes
C) It has a long half-life
D) It is poorly distributed
Correct answer: B
,Rationale: Narrow therapeutic index drugs (e.g., warfarin, digoxin, lithium) have a
small margin between therapeutic and toxic doses. Even small dosage changes can
lead to toxicity or subtherapeutic effects .
Question 5
A patient is prescribed a medication that is known to be highly protein bound.
Which change would most likely increase free drug levels and risk of toxicity?
A) Increased renal blood flow
B) Decreased serum albumin
C) Increased hepatic blood flow
D) Increased gastric pH
Correct answer: B
Rationale: Drugs bound to albumin remain in the bloodstream and are inactive. In
hypoalbuminemia (decreased serum albumin), fewer binding sites are available,
increasing the free (active) drug concentration and risk of adverse effects. This is
particularly important in older adults, malnourished patients, and those with liver
disease .
Question 6
What occurs during Phase 1 metabolism of drugs via CYP450?
A) Drugs are conjugated to increase water solubility
B) Drugs are oxidized, reduced, or hydrolyzed
C) Drugs are excreted unchanged
D) Drugs are bound to plasma proteins
Correct answer: B
Rationale: Phase 1 metabolism involves oxidation, reduction, or hydrolysis reactions,
typically mediated by the CYP450 enzyme system. These reactions prepare drugs for
Phase 2 conjugation reactions .
, Question 7
What occurs during Phase 2 metabolism of drugs?
A) Oxidation and reduction reactions
B) Conjugation reactions (e.g., glucuronidation, sulfation)
C) Drug absorption from the GI tract
D) Drug distribution to tissues
Correct answer: B
Rationale: Phase 2 metabolism involves conjugation reactions that increase water
solubility, facilitating renal excretion. Examples include glucuronidation, sulfation, and
acetylation .
Question 8
The time required for half of a drug concentration to be eliminated from the
body is called:
A) Peak level
B) Bioavailability
C) Half-life
D) Potency
Correct answer: C
Rationale: Half-life determines dosing intervals and the time required to reach
steady state. A drug typically reaches steady state after approximately four to five
half-lives .
SECTION B: PRESCRIPTIVE AUTHORITY & REGULATORY
CONSIDERATIONS
Question 9
Who determines and regulates prescriptive authority for APRNs?
