PRINCIPLES OF BIOCHEMISTRY
ULTIMATE Q MASTER COMPLETE
ANSWERS AND IN DEPTH ITALICIZED
RATIONALES
NSG 3130: Advanced Clinical Pharmacology Practice Exam
1. Autonomic Nervous System: Adrenergic Agonists
A nurse in the intensive care unit is administering a continuous
intravenous infusion of norepinephrine at 8 mcg/min to a client
in septic shock who remains hypotensive despite aggressive fluid
resuscitation. Which of the following physiological responses
should the nurse monitor closely as a direct result of the
medication’s strong alpha-1 adrenergic receptor activation?
A) Marked peripheral vasodilation leading to an increased risk of
severe orthostatic pooling.
B) Significant systemic vasoconstriction resulting in increased
peripheral vascular resistance and potential localized tissue
ischemia.
C) Selective relaxation of bronchial smooth muscle leading to a
dramatic increase in vital capacity.
D) Complete suppression of renin release from the
juxtaglomerular apparatus causing absolute hypokalemia.
CORRECT ANSwER: B
RATIONALE: Norepinephrine is a potent agonist at alpha-1
and beta-1 adrenergic receptors. Its alpha-1 agonist effects cause
profound vasoconstriction of blood vessels, which successfully
raises blood pressure in shock states but can lead to
,complications such as reduced organ perfusion, limb ischemia,
and tissue necrosis if extravasation occurs.
2. Renal System: Loop Diuretics
A nurse is preparing to administer an intravenous bolus of
furosemide 80 mg to a client admitted with an acute exacerbation
of chronic decompensated heart failure, severe fluid volume
excess, and a baseline glomerular filtration rate (GFR) of 35
mL/min. Which of the following instructions should the nurse
implement to minimize the risk of drug-induced ototoxicity?
A) Infuse the medication as a rapid intravenous push over 10 to 15
seconds to achieve high peak serum concentrations rapidly.
B) Dilute the medication in 5% dextrose in water and administer
it over a prolonged 6-hour period via a gravity micro-drip set.
C) Administer the intravenous bolus slowly at a controlled rate
not exceeding 20 mg per minute using an electronic infusion
pump.
D) Hold the medication indefinitely if the client reports a past
history of mild seasonal allergic rhinitis to sulfonamide
derivatives.
CORRECT ANSwER: C
RATIONALE: High doses or rapid administration of loop
diuretics like furosemide can cause transient or permanent
ototoxicity (manifested as tinnitus, hearing loss, or vertigo). To
prevent this adverse effect, the nurse should push the drug slowly
at a maximum rate of 20 mg/min, especially in clients with pre-
existing renal impairment.
3. Cardiovascular System: Cardiac Glycosides
,A nurse is assessing a client who has been taking digoxin 0.25 mg
PO daily for the management of chronic atrial fibrillation. The
client presents to the clinic complaining of new-onset anorexia,
nausea, intermittent blurred vision, and the perception of unusual
yellow-green halos around objects. Which of the following
laboratory investigations is the priority for the nurse to review?
A) Serum digoxin level and serum potassium concentration.
B) Total serum cholesterol and low-density lipoprotein levels.
C) Activated partial thromboplastin time and international
normalized ratio.
D) Blood urea nitrogen and serum alkaline phosphatase levels.
CORRECT ANSwER: A
RATIONALE: Anorexia, nausea, vomiting, and visual
disturbances (such as xanthopsia or yellow-green halos) are
classic early signs of digoxin toxicity. Because hypokalemia
significantly increases the myocardium's sensitivity to digoxin
and precipitates toxicity even at lower serum drug levels, both
the digoxin and potassium levels must be checked immediately.
4. Neurological System: Anticonvulsant Therapy
A nurse is providing comprehensive discharge education to a
client with a new diagnosis of generalized tonic-clonic seizures
who has been prescribed phenytoin 100 mg PO three times daily.
Which of the following long-term adverse effects should the nurse
instruct the client to prevent by maintaining meticulous oral
hygiene and scheduling regular dental evaluations?
A) Severe xerostomia leading to rapid submandibular gland
atrophy.
B) Overgrowth of the gum tissues, clinically classified as gingival
hyperplasia.
, C) Extensive erosion of the dental enamel along the upper incisors
due to gastric reflux.
D) Spontaneous loosening and loss of the primary molars due to
alveolar bone resorption.
CORRECT ANSwER: B
RATIONALE: Gingival hyperplasia is a well-documented long-
term adverse effect of phenytoin therapy. Meticulous oral
hygiene, including regular brushing, flossing, and frequent
professional dental cleanings, can significantly reduce the
severity of this gingival overgrowth.
5. Endocrine System: Thyroid Replacement
A nurse is reinforcing instructions with a client who has primary
hypothyroidism and is starting long-term maintenance therapy
with levothyroxine. Which of the following administration
guidelines must the nurse emphasize to ensure optimal and
consistent bioavailability of the medication?
A) Take the tablet daily with a high-calcium snack or dairy
beverage immediately before bedtime.
B) Take the medication on an empty stomach with a full glass of
plain water 30 to 60 minutes before breakfast.
C) Chew the tablet thoroughly alongside a high-fat breakfast to
facilitate rapid lymphatic absorption.
D) Take the medication concurrently with an over-the-counter
antacid to minimize gastric irritation.
CORRECT ANSwER: B
RATIONALE: Levothyroxine absorption is highly variable and
is significantly reduced by the presence of food, calcium, iron,
and antacids in the gastrointestinal tract. To achieve stable
ULTIMATE Q MASTER COMPLETE
ANSWERS AND IN DEPTH ITALICIZED
RATIONALES
NSG 3130: Advanced Clinical Pharmacology Practice Exam
1. Autonomic Nervous System: Adrenergic Agonists
A nurse in the intensive care unit is administering a continuous
intravenous infusion of norepinephrine at 8 mcg/min to a client
in septic shock who remains hypotensive despite aggressive fluid
resuscitation. Which of the following physiological responses
should the nurse monitor closely as a direct result of the
medication’s strong alpha-1 adrenergic receptor activation?
A) Marked peripheral vasodilation leading to an increased risk of
severe orthostatic pooling.
B) Significant systemic vasoconstriction resulting in increased
peripheral vascular resistance and potential localized tissue
ischemia.
C) Selective relaxation of bronchial smooth muscle leading to a
dramatic increase in vital capacity.
D) Complete suppression of renin release from the
juxtaglomerular apparatus causing absolute hypokalemia.
CORRECT ANSwER: B
RATIONALE: Norepinephrine is a potent agonist at alpha-1
and beta-1 adrenergic receptors. Its alpha-1 agonist effects cause
profound vasoconstriction of blood vessels, which successfully
raises blood pressure in shock states but can lead to
,complications such as reduced organ perfusion, limb ischemia,
and tissue necrosis if extravasation occurs.
2. Renal System: Loop Diuretics
A nurse is preparing to administer an intravenous bolus of
furosemide 80 mg to a client admitted with an acute exacerbation
of chronic decompensated heart failure, severe fluid volume
excess, and a baseline glomerular filtration rate (GFR) of 35
mL/min. Which of the following instructions should the nurse
implement to minimize the risk of drug-induced ototoxicity?
A) Infuse the medication as a rapid intravenous push over 10 to 15
seconds to achieve high peak serum concentrations rapidly.
B) Dilute the medication in 5% dextrose in water and administer
it over a prolonged 6-hour period via a gravity micro-drip set.
C) Administer the intravenous bolus slowly at a controlled rate
not exceeding 20 mg per minute using an electronic infusion
pump.
D) Hold the medication indefinitely if the client reports a past
history of mild seasonal allergic rhinitis to sulfonamide
derivatives.
CORRECT ANSwER: C
RATIONALE: High doses or rapid administration of loop
diuretics like furosemide can cause transient or permanent
ototoxicity (manifested as tinnitus, hearing loss, or vertigo). To
prevent this adverse effect, the nurse should push the drug slowly
at a maximum rate of 20 mg/min, especially in clients with pre-
existing renal impairment.
3. Cardiovascular System: Cardiac Glycosides
,A nurse is assessing a client who has been taking digoxin 0.25 mg
PO daily for the management of chronic atrial fibrillation. The
client presents to the clinic complaining of new-onset anorexia,
nausea, intermittent blurred vision, and the perception of unusual
yellow-green halos around objects. Which of the following
laboratory investigations is the priority for the nurse to review?
A) Serum digoxin level and serum potassium concentration.
B) Total serum cholesterol and low-density lipoprotein levels.
C) Activated partial thromboplastin time and international
normalized ratio.
D) Blood urea nitrogen and serum alkaline phosphatase levels.
CORRECT ANSwER: A
RATIONALE: Anorexia, nausea, vomiting, and visual
disturbances (such as xanthopsia or yellow-green halos) are
classic early signs of digoxin toxicity. Because hypokalemia
significantly increases the myocardium's sensitivity to digoxin
and precipitates toxicity even at lower serum drug levels, both
the digoxin and potassium levels must be checked immediately.
4. Neurological System: Anticonvulsant Therapy
A nurse is providing comprehensive discharge education to a
client with a new diagnosis of generalized tonic-clonic seizures
who has been prescribed phenytoin 100 mg PO three times daily.
Which of the following long-term adverse effects should the nurse
instruct the client to prevent by maintaining meticulous oral
hygiene and scheduling regular dental evaluations?
A) Severe xerostomia leading to rapid submandibular gland
atrophy.
B) Overgrowth of the gum tissues, clinically classified as gingival
hyperplasia.
, C) Extensive erosion of the dental enamel along the upper incisors
due to gastric reflux.
D) Spontaneous loosening and loss of the primary molars due to
alveolar bone resorption.
CORRECT ANSwER: B
RATIONALE: Gingival hyperplasia is a well-documented long-
term adverse effect of phenytoin therapy. Meticulous oral
hygiene, including regular brushing, flossing, and frequent
professional dental cleanings, can significantly reduce the
severity of this gingival overgrowth.
5. Endocrine System: Thyroid Replacement
A nurse is reinforcing instructions with a client who has primary
hypothyroidism and is starting long-term maintenance therapy
with levothyroxine. Which of the following administration
guidelines must the nurse emphasize to ensure optimal and
consistent bioavailability of the medication?
A) Take the tablet daily with a high-calcium snack or dairy
beverage immediately before bedtime.
B) Take the medication on an empty stomach with a full glass of
plain water 30 to 60 minutes before breakfast.
C) Chew the tablet thoroughly alongside a high-fat breakfast to
facilitate rapid lymphatic absorption.
D) Take the medication concurrently with an over-the-counter
antacid to minimize gastric irritation.
CORRECT ANSwER: B
RATIONALE: Levothyroxine absorption is highly variable and
is significantly reduced by the presence of food, calcium, iron,
and antacids in the gastrointestinal tract. To achieve stable
