NUR-641E Final Exam Prep | 200
Questions & Answers | 100% Correct –
GCU
This comprehensive guide covers the NUR-641E Final Exam at Grand
Canyon University, including Advanced Pathophysiology and Pharmacology
for the Nurse Educator.
SECTION 1: PHARMACOKINETICS &
PHARMACODYNAMICS
Question 1
Pharmacokinetics involves which four processes?
A. Absorption, Distribution, Metabolism, Excretion
B. Absorption, Distribution, Metabolism, Elimination
C. Absorption, Digestion, Metabolism, Excretion
D. Administration, Distribution, Metabolism, Excretion
Correct Answer: A
Rationale: Pharmacokinetics is the study of drug movement within the body
and involves four key processes: Absorption (entry into the bloodstream),
Distribution (movement from blood to tissues), Metabolism
(biotransformation, primarily in the liver), and Excretion (removal from the
body, primarily via kidneys).
,Question 2
What is a prodrug?
A. A drug that is active immediately upon administration
B. A biologically inactive compound that is metabolized in the body to
produce an active drug
C. A drug that is only active in the gastrointestinal tract
D. A drug that is eliminated unchanged
Correct Answer: B
Rationale: A prodrug is a biologically inactive compound that must be
metabolized in the body to produce the active therapeutic drug. Prednisone
is an example; it is metabolized to its active form, prednisolone, which has
anti-inflammatory effects.
Question 3
Which of the following is an example of a prodrug?
A. Prednisone
B. Metformin
C. Lisinopril
D. Furosemide
Correct Answer: A
Rationale: Prednisone is a classic example of a prodrug. It is metabolized in
the liver by 11β-hydroxysteroid dehydrogenase to its active metabolite,
prednisolone, which is responsible for its anti-inflammatory and
immunosuppressive effects.
,Question 4
What is bioavailability?
A. The speed at which a drug reaches its target
B. The proportion of a drug that enters the circulation when introduced into
the body and is able to have an active effect
C. The total amount of drug administered
D. The rate of drug metabolism
Correct Answer: B
Rationale: Bioavailability is the proportion of the administered drug that
reaches the systemic circulation in an unchanged form and is available to
produce a pharmacological effect. Intravenous administration has 100%
bioavailability because it bypasses absorption barriers.
Question 5
Which route of administration has the highest bioavailability?
A. Oral
B. Sublingual
C. Intravenous
D. Subcutaneous
Correct Answer: C
Rationale: Intravenous administration delivers the entire dose directly into
the bloodstream, bypassing absorption and first-pass metabolism in the
liver, resulting in 100% bioavailability. Oral drugs are subject to first-pass
metabolism, which reduces bioavailability.
Question 6
Which route of administration bypasses hepatic first-pass metabolism?
, A. Oral
B. Intravenous
C. Subcutaneous
D. Rectal
Correct Answer: B
Rationale: Intravenous administration places the entire dose directly into
the venous system, thus bypassing absorption from the gastrointestinal
tract and avoiding hepatic first-pass metabolism in the liver. This is why IV
drugs have the highest bioavailability and fastest onset of action.
Question 7
What is the cytochrome P450 system?
A. A system that regulates blood pressure
B. A superfamily of enzymes, primarily found in the liver, that plays a crucial
role in metabolizing drugs, chemicals, and endogenous substances
C. A system responsible for drug excretion
D. A system that controls drug absorption
Correct Answer: B
Rationale: The cytochrome P450 (CYP450) system is a superfamily of
enzymes primarily located in the liver. These enzymes are responsible for
the oxidative metabolism of many drugs, converting them into more
water-soluble forms that can be excreted. CYP3A4 is responsible for
metabolizing approximately 50% of all drugs.
Question 8
A patient is taking a drug that is a CYP3A4 substrate. Grapefruit juice will
have what effect?
Questions & Answers | 100% Correct –
GCU
This comprehensive guide covers the NUR-641E Final Exam at Grand
Canyon University, including Advanced Pathophysiology and Pharmacology
for the Nurse Educator.
SECTION 1: PHARMACOKINETICS &
PHARMACODYNAMICS
Question 1
Pharmacokinetics involves which four processes?
A. Absorption, Distribution, Metabolism, Excretion
B. Absorption, Distribution, Metabolism, Elimination
C. Absorption, Digestion, Metabolism, Excretion
D. Administration, Distribution, Metabolism, Excretion
Correct Answer: A
Rationale: Pharmacokinetics is the study of drug movement within the body
and involves four key processes: Absorption (entry into the bloodstream),
Distribution (movement from blood to tissues), Metabolism
(biotransformation, primarily in the liver), and Excretion (removal from the
body, primarily via kidneys).
,Question 2
What is a prodrug?
A. A drug that is active immediately upon administration
B. A biologically inactive compound that is metabolized in the body to
produce an active drug
C. A drug that is only active in the gastrointestinal tract
D. A drug that is eliminated unchanged
Correct Answer: B
Rationale: A prodrug is a biologically inactive compound that must be
metabolized in the body to produce the active therapeutic drug. Prednisone
is an example; it is metabolized to its active form, prednisolone, which has
anti-inflammatory effects.
Question 3
Which of the following is an example of a prodrug?
A. Prednisone
B. Metformin
C. Lisinopril
D. Furosemide
Correct Answer: A
Rationale: Prednisone is a classic example of a prodrug. It is metabolized in
the liver by 11β-hydroxysteroid dehydrogenase to its active metabolite,
prednisolone, which is responsible for its anti-inflammatory and
immunosuppressive effects.
,Question 4
What is bioavailability?
A. The speed at which a drug reaches its target
B. The proportion of a drug that enters the circulation when introduced into
the body and is able to have an active effect
C. The total amount of drug administered
D. The rate of drug metabolism
Correct Answer: B
Rationale: Bioavailability is the proportion of the administered drug that
reaches the systemic circulation in an unchanged form and is available to
produce a pharmacological effect. Intravenous administration has 100%
bioavailability because it bypasses absorption barriers.
Question 5
Which route of administration has the highest bioavailability?
A. Oral
B. Sublingual
C. Intravenous
D. Subcutaneous
Correct Answer: C
Rationale: Intravenous administration delivers the entire dose directly into
the bloodstream, bypassing absorption and first-pass metabolism in the
liver, resulting in 100% bioavailability. Oral drugs are subject to first-pass
metabolism, which reduces bioavailability.
Question 6
Which route of administration bypasses hepatic first-pass metabolism?
, A. Oral
B. Intravenous
C. Subcutaneous
D. Rectal
Correct Answer: B
Rationale: Intravenous administration places the entire dose directly into
the venous system, thus bypassing absorption from the gastrointestinal
tract and avoiding hepatic first-pass metabolism in the liver. This is why IV
drugs have the highest bioavailability and fastest onset of action.
Question 7
What is the cytochrome P450 system?
A. A system that regulates blood pressure
B. A superfamily of enzymes, primarily found in the liver, that plays a crucial
role in metabolizing drugs, chemicals, and endogenous substances
C. A system responsible for drug excretion
D. A system that controls drug absorption
Correct Answer: B
Rationale: The cytochrome P450 (CYP450) system is a superfamily of
enzymes primarily located in the liver. These enzymes are responsible for
the oxidative metabolism of many drugs, converting them into more
water-soluble forms that can be excreted. CYP3A4 is responsible for
metabolizing approximately 50% of all drugs.
Question 8
A patient is taking a drug that is a CYP3A4 substrate. Grapefruit juice will
have what effect?
