NSG3100 Exam 4 PREP
NSG3100 EXAM 4 PREP NEWEST 2026/2027 ACTUAL EXAM
COMPLETE 120 QUESTIONS AND CORRECT DETAILED ANSWERS
(VERIFIED ANSWERS) WITH DETAILED RATIONALES|ALREADY
GRADED A+||BRAND NEW VERSION!!
Which is the most important question the nurse should ask the client who has
been diagnosed with isotonic dehydration to identify a possible cause of the fluid
imbalance?
A. “Do you take diuretics or 'water pills'?”
B. “What and how much do you normally eat over a day's time?”
C. “How many bowel movements do you usually have each day?”
D. “Have you or any member of your family been diagnosed with diabetes
mellitus?”
Correct Answer: A. “Do you take diuretics or 'water pills'?”
Rationale: Diuretics promote equal loss of water and electrolytes, which is a
primary cause of isotonic dehydration. Asking about diuretic use directly addresses
a common etiology. Questions about diet, bowel movements, or family history of
diabetes may provide general health information but are less likely to pinpoint the
specific cause of isotonic fluid loss.
Which choice of mouth care product or technique is best for the nurse to use
every 2 hours when providing mouth care for the client with dehydration who has
a dry, sticky mouth?
A. A commercial, alcohol-based mouthwash
B. A dilute solution of 50% hydrogen peroxide and 50% normal saline
C. Lemon and glycerol swabs
D. Warm tap water
1|Page
, NSG3100 Exam 4 PREP
Correct Answer: D. Warm tap water
Rationale: For a dehydrated client with a dry mouth, the safest and most effective
oral care is frequent use of warm tap water to moisten the mucosa. Alcohol-based
mouthwashes, lemon/glycerol swabs, or hydrogen peroxide solutions can irritate
or dry out the oral tissues further. Warm water provides gentle hydration,
improves comfort, and helps maintain oral integrity without introducing additional
risks.
With which client should the nurse be most alert for the possibility of hypertonic
dehydration?
A. 52-year-old woman with excessive wound bleeding 4 hours after surgery
B. 55-year-old man with diabetes mellitus in ketoacidosis
C. 80-year-old woman with chronic heart failure
D. 60-year-old man with severe malnutrition
Correct Answer: B. 55-year-old man with diabetes mellitus in ketoacidosis
Rationale: Hypertonic dehydration results from a relative water deficit compared
to solutes, often caused by conditions that increase solute concentration, such as
uncontrolled diabetes mellitus leading to ketoacidosis. In this scenario, high
glucose levels pull water out of cells, increasing osmolarity. The other clients may
experience isotonic or hypotonic dehydration depending on fluid loss mechanisms
but are less likely to develop hypertonic dehydration.
Which blood electrolyte level is most important to monitor in the client who has
hypertonic dehydration?
A. Sodium
B. Potassium
C. Calcium
D. Magnesium
2|Page
, NSG3100 Exam 4 PREP
Correct Answer: B. Potassium
Rationale: In hypertonic dehydration, water shifts out of cells into the ECF, causing
cellular dehydration and potentially significant potassium loss due to osmotic
diuresis and renal excretion. Monitoring potassium is crucial to prevent cardiac
arrhythmias and neuromuscular complications. Sodium levels are elevated due to
water deficit, but potassium replacement is often the critical intervention to
restore safe electrolyte balance.
The client has had a fever for 3 days and has lost 7 pounds. Laboratory tests show
the client's blood osmolarity to be 322 mOsm/L, with a blood sodium level of 148
mmol/L (mEq/L). What is the correct interpretation of this data?
A. Relative dehydration
B. Isotonic dehydration
C. Hypertonic dehydration
D. Hypotonic dehydration
Correct Answer: C. Hypertonic dehydration
Rationale: Hypertonic dehydration is characterized by a loss of water that exceeds
the loss of electrolytes, resulting in increased serum osmolarity (>295 mOsm/L)
and elevated sodium levels (>145 mmol/L). The client’s laboratory values—high
osmolarity (322 mOsm/L) and hypernatremia (148 mmol/L)—indicate that water
loss is predominant, consistent with hypertonic dehydration. Fever increases
insensible water loss through sweating and respiratory evaporation, further
contributing to this fluid imbalance.
Which intravenous solution should the nurse be prepared to administer to a client
who has isotonic dehydration?
A. Dextrose 5% in water
B. Dextrose 10% in water
3|Page
, NSG3100 Exam 4 PREP
C. 0.45% sodium chloride
D. 0.9% sodium chloride
Correct Answer: D. 0.9% sodium chloride
Rationale: Isotonic dehydration involves equal loss of water and sodium.
Administering 0.9% sodium chloride (normal saline) restores both the fluid and
electrolyte deficits without causing fluid shifts between compartments. Hypotonic
solutions could worsen cellular swelling, while hypertonic solutions could draw
water out of cells, both of which are inappropriate for isotonic dehydration.
Which client is at greatest risk for dehydration?
A. The younger adult client with immobility
B. The older adult client receiving hypotonic IV fluid
C. The younger adult client receiving hypertonic IV fluid
D. The older adult client with cognitive impairment
Correct Answer: D. The older adult client with cognitive impairment
Rationale: Older adults are at higher risk for dehydration due to age-related
changes in thirst perception, kidney function, and total body water content.
Cognitive impairment further increases this risk because these clients may forget
to drink fluids or may be unable to communicate their need for hydration. While
younger adults and those receiving IV fluids can experience fluid imbalances, the
combination of aging and cognitive decline creates the greatest vulnerability for
dehydration.
What are the fluid compartment consequences of isotonic dehydration?
A. ECF compartment volume contracts, ICF volume contracts
B. ECF compartment volume contracts, ICF volume remains the same
C. ECF compartment volume expands, ICF volume contracts
D. ECF compartment volume expands, ICF volume remains the same
4|Page
NSG3100 EXAM 4 PREP NEWEST 2026/2027 ACTUAL EXAM
COMPLETE 120 QUESTIONS AND CORRECT DETAILED ANSWERS
(VERIFIED ANSWERS) WITH DETAILED RATIONALES|ALREADY
GRADED A+||BRAND NEW VERSION!!
Which is the most important question the nurse should ask the client who has
been diagnosed with isotonic dehydration to identify a possible cause of the fluid
imbalance?
A. “Do you take diuretics or 'water pills'?”
B. “What and how much do you normally eat over a day's time?”
C. “How many bowel movements do you usually have each day?”
D. “Have you or any member of your family been diagnosed with diabetes
mellitus?”
Correct Answer: A. “Do you take diuretics or 'water pills'?”
Rationale: Diuretics promote equal loss of water and electrolytes, which is a
primary cause of isotonic dehydration. Asking about diuretic use directly addresses
a common etiology. Questions about diet, bowel movements, or family history of
diabetes may provide general health information but are less likely to pinpoint the
specific cause of isotonic fluid loss.
Which choice of mouth care product or technique is best for the nurse to use
every 2 hours when providing mouth care for the client with dehydration who has
a dry, sticky mouth?
A. A commercial, alcohol-based mouthwash
B. A dilute solution of 50% hydrogen peroxide and 50% normal saline
C. Lemon and glycerol swabs
D. Warm tap water
1|Page
, NSG3100 Exam 4 PREP
Correct Answer: D. Warm tap water
Rationale: For a dehydrated client with a dry mouth, the safest and most effective
oral care is frequent use of warm tap water to moisten the mucosa. Alcohol-based
mouthwashes, lemon/glycerol swabs, or hydrogen peroxide solutions can irritate
or dry out the oral tissues further. Warm water provides gentle hydration,
improves comfort, and helps maintain oral integrity without introducing additional
risks.
With which client should the nurse be most alert for the possibility of hypertonic
dehydration?
A. 52-year-old woman with excessive wound bleeding 4 hours after surgery
B. 55-year-old man with diabetes mellitus in ketoacidosis
C. 80-year-old woman with chronic heart failure
D. 60-year-old man with severe malnutrition
Correct Answer: B. 55-year-old man with diabetes mellitus in ketoacidosis
Rationale: Hypertonic dehydration results from a relative water deficit compared
to solutes, often caused by conditions that increase solute concentration, such as
uncontrolled diabetes mellitus leading to ketoacidosis. In this scenario, high
glucose levels pull water out of cells, increasing osmolarity. The other clients may
experience isotonic or hypotonic dehydration depending on fluid loss mechanisms
but are less likely to develop hypertonic dehydration.
Which blood electrolyte level is most important to monitor in the client who has
hypertonic dehydration?
A. Sodium
B. Potassium
C. Calcium
D. Magnesium
2|Page
, NSG3100 Exam 4 PREP
Correct Answer: B. Potassium
Rationale: In hypertonic dehydration, water shifts out of cells into the ECF, causing
cellular dehydration and potentially significant potassium loss due to osmotic
diuresis and renal excretion. Monitoring potassium is crucial to prevent cardiac
arrhythmias and neuromuscular complications. Sodium levels are elevated due to
water deficit, but potassium replacement is often the critical intervention to
restore safe electrolyte balance.
The client has had a fever for 3 days and has lost 7 pounds. Laboratory tests show
the client's blood osmolarity to be 322 mOsm/L, with a blood sodium level of 148
mmol/L (mEq/L). What is the correct interpretation of this data?
A. Relative dehydration
B. Isotonic dehydration
C. Hypertonic dehydration
D. Hypotonic dehydration
Correct Answer: C. Hypertonic dehydration
Rationale: Hypertonic dehydration is characterized by a loss of water that exceeds
the loss of electrolytes, resulting in increased serum osmolarity (>295 mOsm/L)
and elevated sodium levels (>145 mmol/L). The client’s laboratory values—high
osmolarity (322 mOsm/L) and hypernatremia (148 mmol/L)—indicate that water
loss is predominant, consistent with hypertonic dehydration. Fever increases
insensible water loss through sweating and respiratory evaporation, further
contributing to this fluid imbalance.
Which intravenous solution should the nurse be prepared to administer to a client
who has isotonic dehydration?
A. Dextrose 5% in water
B. Dextrose 10% in water
3|Page
, NSG3100 Exam 4 PREP
C. 0.45% sodium chloride
D. 0.9% sodium chloride
Correct Answer: D. 0.9% sodium chloride
Rationale: Isotonic dehydration involves equal loss of water and sodium.
Administering 0.9% sodium chloride (normal saline) restores both the fluid and
electrolyte deficits without causing fluid shifts between compartments. Hypotonic
solutions could worsen cellular swelling, while hypertonic solutions could draw
water out of cells, both of which are inappropriate for isotonic dehydration.
Which client is at greatest risk for dehydration?
A. The younger adult client with immobility
B. The older adult client receiving hypotonic IV fluid
C. The younger adult client receiving hypertonic IV fluid
D. The older adult client with cognitive impairment
Correct Answer: D. The older adult client with cognitive impairment
Rationale: Older adults are at higher risk for dehydration due to age-related
changes in thirst perception, kidney function, and total body water content.
Cognitive impairment further increases this risk because these clients may forget
to drink fluids or may be unable to communicate their need for hydration. While
younger adults and those receiving IV fluids can experience fluid imbalances, the
combination of aging and cognitive decline creates the greatest vulnerability for
dehydration.
What are the fluid compartment consequences of isotonic dehydration?
A. ECF compartment volume contracts, ICF volume contracts
B. ECF compartment volume contracts, ICF volume remains the same
C. ECF compartment volume expands, ICF volume contracts
D. ECF compartment volume expands, ICF volume remains the same
4|Page
