PHARMACOLOGY NURS 251 MODULE 1 EXAM 2026/2027
| Portage Learning ABCnursing Geneva College | Verified
Edition Questions & Answers | Pass Guaranteed - A+
Graded
Section 1: Pharmacokinetics (Questions 1-30)
Q1: A nurse is administering an oral medication and explains to the patient that the drug
must first pass through the liver before entering the systemic circulation. Which
pharmacokinetic phase is the nurse describing?
A. Distribution
B. Excretion
C. First-pass effect [CORRECT]
D. Biotransformation phase II
Correct Answer: C
Rationale: The first-pass effect is the hepatic metabolism of an oral drug before it
reaches systemic circulation, reducing its bioavailability, making C correct; A is wrong
because distribution is the transport to tissues, B is wrong because excretion is
elimination, and D is wrong because phase II is conjugation, not the initial hepatic
passage. This aligns with NURS 251 curriculum objectives for absorption routes, and
the Module 1 Exam Insight is that Portage frequently tests PO vs IV bioavailability
differences specifically tied to the first-pass effect.
Q2: A patient with severe nausea and vomiting requires an antiemetic. The nurse
anticipates that the prescriber will avoid which route of administration due to unreliable
absorption?
A. Intravenous (IV)
B. Sublingual (SL)
C. Oral (PO) [CORRECT]
D. Transdermal
Correct Answer: C
Rationale: Oral administration relies on GI motility and absorption, which is unreliable in
vomiting patients, making C correct; A is wrong because IV provides immediate 100%
bioavailability, B is wrong because SL bypasses the GI tract, and D is wrong because
transdermal absorption is unaffected by GI status. This aligns with NURS 251
curriculum objectives for route selection, and the Module 1 Exam Insight is that
ABCnursing heavily emphasizes identifying alternative routes for NPO or vomiting
patients.
,Q3: A nurse is reviewing the pharmacokinetics of a weakly acidic drug. The nurse
understands that this drug will be absorbed most efficiently in which gastrointestinal
environment?
A. Small intestine (alkaline pH)
B. Stomach (acidic pH) [CORRECT]
C. Large intestine (neutral pH)
D. Rectum (variable pH)
Correct Answer: B
Rationale: Weak acids remain predominantly in their non-ionized, lipid-soluble form in
acidic environments like the stomach, allowing them to cross membranes efficiently,
making B correct; A is wrong because alkaline environments ionize weak acids,
reducing absorption, C is wrong because the large intestine has minimal absorptive
surface for acids, and D is wrong because rectal pH is less predictable. This aligns with
NURS 251 curriculum objectives for pH and ionization, and the Module 1 Exam Insight
is that Geneva College exams often pair weak acid/base properties directly with
stomach vs. small intestine absorption.
Q4: A patient asks the nurse why their sublingual nitroglycerin works faster than their
oral nitroglycerin pill. What is the best response by the nurse?
A. "The sublingual route has a larger surface area for absorption."
B. "The sublingual route bypasses the first-pass effect in the liver." [CORRECT]
C. "The sublingual route is absorbed directly into the hepatic portal vein."
D. "The sublingual route requires enzymes in the mouth for activation."
Correct Answer: B
Rationale: Sublingual administration bypasses the hepatic portal circulation, preventing
the first-pass effect and allowing rapid systemic onset, making B correct; A is wrong
because the small intestine has the largest surface area, C is wrong because bypassing
the portal vein is the mechanism, and D is wrong because sublingual drugs do not rely
on salivary enzymes. This aligns with NURS 251 curriculum objectives for enteral
routes, and the Module 1 Exam Insight is that Portage consistently tests the mechanistic
reason why SL/rectal routes avoid first-pass metabolism.
Q5: A nurse is preparing to administer an intramuscular (IM) injection to an adult
patient. What is the maximum volume the nurse can safely administer into a single IM
site?
A. 1.0 mL
B. 2.0 mL
C. 3.0 mL [CORRECT]
D. 5.0 mL
Correct Answer: C
,Rationale: The maximum safe volume for an IM injection in an adult is generally 3 mL
(up to 5 mL in large muscles like the ventrogluteal), making C correct; A and B are
maximums for subcutaneous and intradermal injections respectively, and D is typically
the absolute upper limit only for specific large muscle sites. This aligns with NURS 251
curriculum objectives for parenteral administration, and the Module 1 Exam Insight is
that ABCnursing frequently uses volume capacity to differentiate between SQ, IM, and
ID routes.
Q6: A nursing student is performing a purified protein derivative (PPD) skin test. Which
route of administration must the student use?
A. Intramuscular (IM)
B. Subcutaneous (SQ)
C. Intradermal (ID) [CORRECT]
D. Intravenous (IV)
Correct Answer: C
Rationale: Intradermal injections are specifically used for diagnostic tests like the PPD
or allergy testing, limited to 0.1 mL volume to form a wheal, making C correct; A is
wrong because IM is for larger volumes, B is wrong because SQ is for insulin or
heparin, and D is wrong because IV is for immediate systemic effect. This aligns with
NURS 251 curriculum objectives for specific route indications, and the Module 1 Exam
Insight is that Geneva College exams directly link the 0.1 mL volume parameter to
intradermal diagnostic testing.
Q7: In an emergency situation where intravenous (IV) access cannot be established,
the provider orders an intraosseous (IO) medication. The nurse understands that the
medication delivered via IO will have a pharmacokinetic profile similar to which route?
A. Subcutaneous
B. Oral
C. Intravenous [CORRECT]
D. Intramuscular
Correct Answer: C
Rationale: The intraosseous route accesses the highly vascularized bone marrow,
allowing rapid systemic absorption equivalent to intravenous access, making C correct;
A and D are wrong because SQ and IM have slower absorption rates dependent on
tissue blood flow, and B is wrong because PO has variable absorption and first-pass
metabolism. This aligns with NURS 251 curriculum objectives for emergency parenteral
routes, and the Module 1 Exam Insight is that Portage tests IO access as the definitive
IV alternative in critical care scenarios.
Q8: A patient receives a drug with a known bioavailability of 40%. If the prescriber
orders 100 mg orally, how much of the drug actually reaches the systemic circulation?
, A. 40 mg [CORRECT]
B. 60 mg
C. 100 mg
D. 140 mg
Correct Answer: A
Rationale: Bioavailability is the fraction of the administered dose that reaches systemic
circulation, calculated as 40% of 100 mg (0.40 x 100 = 40 mg), making A correct; B is
wrong as it represents the lost portion, C is wrong because 100% bioavailability only
occurs with IV, and D is wrong as bioavailability cannot exceed 100%. This aligns with
NURS 251 curriculum objectives for pharmacokinetic calculations, and the Module 1
Exam Insight is that ABCnursing exams frequently include straightforward bioavailability
percentage calculations.
Q9: A nurse is evaluating the distribution phase of a highly lipid-soluble medication.
Which statement accurately describes the distribution of this drug?
A. It will primarily remain in the vascular compartment.
B. It will distribute rapidly to highly perfused organs then to fat. [CORRECT]
C. It will bind extensively to albumin in the blood.
D. It will be unable to cross the blood-brain barrier.
Correct Answer: B
Rationale: Lipid-soluble drugs cross cell membranes easily, initially distributing to highly
perfused organs (brain, heart, liver) and eventually redistributing to adipose tissue,
making B correct; A is wrong because lipid-soluble drugs leave the vascular space, C is
wrong because lipid solubility implies tissue penetration rather than protein binding, and
D is wrong because lipid solubility is required to cross the BBB. This aligns with NURS
251 curriculum objectives for distribution factors, and the Module 1 Exam Insight is that
Geneva College exams test the sequential blood flow model of drug distribution.
Q10: A patient has a low serum albumin level due to severe malnutrition. The nurse is
preparing to administer a highly protein-bound drug (e.g., warfarin). What clinical effect
should the nurse anticipate?
A. Decreased therapeutic effect due to rapid excretion.
B. Increased risk of drug toxicity due to higher free drug levels. [CORRECT]
C. Prolonged half-life due to increased protein binding.
D. Rapid metabolism due to increased hepatic enzyme activity.
Correct Answer: B
Rationale: Hypoalbuminemia reduces the number of available binding sites, displacing
the drug and increasing the free (active) fraction, which leads to toxicity, making B
correct; A is wrong because free drug is active, not excreted faster initially, C is wrong
because binding decreases, and D is wrong because metabolism is not directly
increased by low albumin. This aligns with NURS 251 curriculum objectives for protein
| Portage Learning ABCnursing Geneva College | Verified
Edition Questions & Answers | Pass Guaranteed - A+
Graded
Section 1: Pharmacokinetics (Questions 1-30)
Q1: A nurse is administering an oral medication and explains to the patient that the drug
must first pass through the liver before entering the systemic circulation. Which
pharmacokinetic phase is the nurse describing?
A. Distribution
B. Excretion
C. First-pass effect [CORRECT]
D. Biotransformation phase II
Correct Answer: C
Rationale: The first-pass effect is the hepatic metabolism of an oral drug before it
reaches systemic circulation, reducing its bioavailability, making C correct; A is wrong
because distribution is the transport to tissues, B is wrong because excretion is
elimination, and D is wrong because phase II is conjugation, not the initial hepatic
passage. This aligns with NURS 251 curriculum objectives for absorption routes, and
the Module 1 Exam Insight is that Portage frequently tests PO vs IV bioavailability
differences specifically tied to the first-pass effect.
Q2: A patient with severe nausea and vomiting requires an antiemetic. The nurse
anticipates that the prescriber will avoid which route of administration due to unreliable
absorption?
A. Intravenous (IV)
B. Sublingual (SL)
C. Oral (PO) [CORRECT]
D. Transdermal
Correct Answer: C
Rationale: Oral administration relies on GI motility and absorption, which is unreliable in
vomiting patients, making C correct; A is wrong because IV provides immediate 100%
bioavailability, B is wrong because SL bypasses the GI tract, and D is wrong because
transdermal absorption is unaffected by GI status. This aligns with NURS 251
curriculum objectives for route selection, and the Module 1 Exam Insight is that
ABCnursing heavily emphasizes identifying alternative routes for NPO or vomiting
patients.
,Q3: A nurse is reviewing the pharmacokinetics of a weakly acidic drug. The nurse
understands that this drug will be absorbed most efficiently in which gastrointestinal
environment?
A. Small intestine (alkaline pH)
B. Stomach (acidic pH) [CORRECT]
C. Large intestine (neutral pH)
D. Rectum (variable pH)
Correct Answer: B
Rationale: Weak acids remain predominantly in their non-ionized, lipid-soluble form in
acidic environments like the stomach, allowing them to cross membranes efficiently,
making B correct; A is wrong because alkaline environments ionize weak acids,
reducing absorption, C is wrong because the large intestine has minimal absorptive
surface for acids, and D is wrong because rectal pH is less predictable. This aligns with
NURS 251 curriculum objectives for pH and ionization, and the Module 1 Exam Insight
is that Geneva College exams often pair weak acid/base properties directly with
stomach vs. small intestine absorption.
Q4: A patient asks the nurse why their sublingual nitroglycerin works faster than their
oral nitroglycerin pill. What is the best response by the nurse?
A. "The sublingual route has a larger surface area for absorption."
B. "The sublingual route bypasses the first-pass effect in the liver." [CORRECT]
C. "The sublingual route is absorbed directly into the hepatic portal vein."
D. "The sublingual route requires enzymes in the mouth for activation."
Correct Answer: B
Rationale: Sublingual administration bypasses the hepatic portal circulation, preventing
the first-pass effect and allowing rapid systemic onset, making B correct; A is wrong
because the small intestine has the largest surface area, C is wrong because bypassing
the portal vein is the mechanism, and D is wrong because sublingual drugs do not rely
on salivary enzymes. This aligns with NURS 251 curriculum objectives for enteral
routes, and the Module 1 Exam Insight is that Portage consistently tests the mechanistic
reason why SL/rectal routes avoid first-pass metabolism.
Q5: A nurse is preparing to administer an intramuscular (IM) injection to an adult
patient. What is the maximum volume the nurse can safely administer into a single IM
site?
A. 1.0 mL
B. 2.0 mL
C. 3.0 mL [CORRECT]
D. 5.0 mL
Correct Answer: C
,Rationale: The maximum safe volume for an IM injection in an adult is generally 3 mL
(up to 5 mL in large muscles like the ventrogluteal), making C correct; A and B are
maximums for subcutaneous and intradermal injections respectively, and D is typically
the absolute upper limit only for specific large muscle sites. This aligns with NURS 251
curriculum objectives for parenteral administration, and the Module 1 Exam Insight is
that ABCnursing frequently uses volume capacity to differentiate between SQ, IM, and
ID routes.
Q6: A nursing student is performing a purified protein derivative (PPD) skin test. Which
route of administration must the student use?
A. Intramuscular (IM)
B. Subcutaneous (SQ)
C. Intradermal (ID) [CORRECT]
D. Intravenous (IV)
Correct Answer: C
Rationale: Intradermal injections are specifically used for diagnostic tests like the PPD
or allergy testing, limited to 0.1 mL volume to form a wheal, making C correct; A is
wrong because IM is for larger volumes, B is wrong because SQ is for insulin or
heparin, and D is wrong because IV is for immediate systemic effect. This aligns with
NURS 251 curriculum objectives for specific route indications, and the Module 1 Exam
Insight is that Geneva College exams directly link the 0.1 mL volume parameter to
intradermal diagnostic testing.
Q7: In an emergency situation where intravenous (IV) access cannot be established,
the provider orders an intraosseous (IO) medication. The nurse understands that the
medication delivered via IO will have a pharmacokinetic profile similar to which route?
A. Subcutaneous
B. Oral
C. Intravenous [CORRECT]
D. Intramuscular
Correct Answer: C
Rationale: The intraosseous route accesses the highly vascularized bone marrow,
allowing rapid systemic absorption equivalent to intravenous access, making C correct;
A and D are wrong because SQ and IM have slower absorption rates dependent on
tissue blood flow, and B is wrong because PO has variable absorption and first-pass
metabolism. This aligns with NURS 251 curriculum objectives for emergency parenteral
routes, and the Module 1 Exam Insight is that Portage tests IO access as the definitive
IV alternative in critical care scenarios.
Q8: A patient receives a drug with a known bioavailability of 40%. If the prescriber
orders 100 mg orally, how much of the drug actually reaches the systemic circulation?
, A. 40 mg [CORRECT]
B. 60 mg
C. 100 mg
D. 140 mg
Correct Answer: A
Rationale: Bioavailability is the fraction of the administered dose that reaches systemic
circulation, calculated as 40% of 100 mg (0.40 x 100 = 40 mg), making A correct; B is
wrong as it represents the lost portion, C is wrong because 100% bioavailability only
occurs with IV, and D is wrong as bioavailability cannot exceed 100%. This aligns with
NURS 251 curriculum objectives for pharmacokinetic calculations, and the Module 1
Exam Insight is that ABCnursing exams frequently include straightforward bioavailability
percentage calculations.
Q9: A nurse is evaluating the distribution phase of a highly lipid-soluble medication.
Which statement accurately describes the distribution of this drug?
A. It will primarily remain in the vascular compartment.
B. It will distribute rapidly to highly perfused organs then to fat. [CORRECT]
C. It will bind extensively to albumin in the blood.
D. It will be unable to cross the blood-brain barrier.
Correct Answer: B
Rationale: Lipid-soluble drugs cross cell membranes easily, initially distributing to highly
perfused organs (brain, heart, liver) and eventually redistributing to adipose tissue,
making B correct; A is wrong because lipid-soluble drugs leave the vascular space, C is
wrong because lipid solubility implies tissue penetration rather than protein binding, and
D is wrong because lipid solubility is required to cross the BBB. This aligns with NURS
251 curriculum objectives for distribution factors, and the Module 1 Exam Insight is that
Geneva College exams test the sequential blood flow model of drug distribution.
Q10: A patient has a low serum albumin level due to severe malnutrition. The nurse is
preparing to administer a highly protein-bound drug (e.g., warfarin). What clinical effect
should the nurse anticipate?
A. Decreased therapeutic effect due to rapid excretion.
B. Increased risk of drug toxicity due to higher free drug levels. [CORRECT]
C. Prolonged half-life due to increased protein binding.
D. Rapid metabolism due to increased hepatic enzyme activity.
Correct Answer: B
Rationale: Hypoalbuminemia reduces the number of available binding sites, displacing
the drug and increasing the free (active) fraction, which leads to toxicity, making B
correct; A is wrong because free drug is active, not excreted faster initially, C is wrong
because binding decreases, and D is wrong because metabolism is not directly
increased by low albumin. This aligns with NURS 251 curriculum objectives for protein
