NSG 3280 Exam 3 REVIEW 2026
1. A nursing student is reviewing the Monroe-Kellie hypothesis. Which statement by the student
indicates a correct understanding of the components that compose the volume of the cranium?
A. "The cranium contains brain tissue, lymph, and arterial blood."
B. "The volume is determined by neurons, glial cells, and interstitial fluid."
C. "The three elements are brain tissue, cerebral spinal fluid (CSF), and blood."
D. "The cranium is composed of bone, meninges, and cerebrospinal fluid."
ANSWER: C
Rationale:
A: Lymph is not considered one of the three primary volume components in the Monroe-Kellie
hypothesis.
B: While neurons and glial cells make up the tissue, the hypothesis categorizes the volume broadly as
tissue, fluid, and blood.
C: Correct. The Monroe-Kellie hypothesis states that the cranial vault is a rigid container holding three
components: brain tissue, CSF, and blood.
D: Bone and meninges are structures, but the volume components that can fluctuate and affect pressure
are tissue, CSF, and blood.
2. A patient with right-sided heart failure is admitted to the unit. The nurse understands that this
condition can lead to increased intracranial pressure (ICP) primarily due to:
A. Decreased production of cerebral spinal fluid.
B. An increase in central venous pressure affecting blood volume in the cranium.
C. Atrial dilation causing a decrease in cerebral blood flow.
D. Hyperventilation leading to cerebral vasoconstriction.
ANSWER: B
Rationale:
A: Heart failure does not typically decrease CSF production; it affects fluid dynamics.
,B: Correct. Heart failure leads to an increase in central venous pressure. Since the venous system drains
the brain, increased pressure here increases the blood volume within the cranium, raising ICP.
C: Atrial dilation is a sign of volume overload, but the mechanism for increased ICP is the backup of
venous blood, not a decrease in flow.
D: Hyperventilation usually decreases ICP by causing vasoconstriction; heart failure does not inherently
cause hyperventilation as a primary mechanism for ICP rise.
3. According to the Monroe-Kellie hypothesis, if there is an increase in the volume of one intracranial
component, what is the expected physiological response?
A. The cranial bones will expand to accommodate the volume.
B. There will be a compensatory decrease in one or both of the other components.
C. Intracranial pressure will remain stable due to high compliance.
D. Cerebral spinal fluid production will immediately stop.
ANSWER: B
Rationale:
A: The adult cranium is rigid and cannot expand.
B: Correct. This is the core of the Monroe-Kellie hypothesis: an increase in one component (e.g., blood)
must be compensated for by a decrease in another (e.g., CSF or blood displacement) to maintain normal
pressure.
C: Pressure will eventually rise if compensation fails; compliance is limited.
D: CSF production is continuous; it may be displaced or absorbed faster, but production doesn't just
stop.
4. The nurse is caring for a patient with a brain tumor. The nurse identifies that the tumor is causing
increased ICP primarily because:
A. It acts as a space-occupying lesion.
B. It causes systemic hypotension.
C. It increases the production of antioxidants.
D. It leads to a decrease in cerebral blood volume.
ANSWER: A
Rationale:
A: Correct. A tumor is a "space-occupying lesion" that adds volume to the fixed cranial space, directly
increasing ICP.
,B: Systemic hypotension would decrease cerebral perfusion, not necessarily increase ICP directly
(though it causes ischemia).
C: Antioxidants are protective; tumors do not increase them to raise ICP.
D: A tumor usually compresses vessels or adds volume; it doesn't primarily cause a decrease in blood
volume as the mechanism for high ICP.
5. Which pathophysiological process is described as the "stealing of an electron" from fully paired
atoms, leading to damage of cell components?
A. Ischemia
B. Oxidative stress caused by free radicals
C. ATP depletion
D. Cytotoxic edema
ANSWER: B
Rationale:
A: Ischemia is lack of blood flow.
B: Correct. Free radicals are unstable atoms that steal electrons from other atoms to stabilize
themselves, causing oxidative stress and cell damage (Reperfusion Injury).
C: ATP depletion is the lack of energy, not the electron stealing mechanism itself.
D: Cytotoxic edema is cellular swelling, a result of injury, not the electron stealing process.
6. A patient has suffered a stroke and blood flow is restored (reperfusion). The nurse monitors for
"Reperfusion Injury." What is the primary mechanism of this secondary injury?
A. The sudden influx of oxygen leads to the formation of free radicals.
B. The brain cells swell due to lack of glucose.
C. The blood vessels constrict too tightly.
D. The intracranial pressure drops too low.
ANSWER: A
Rationale:
A: Correct. When oxygen returns to ischemic tissue, it can lead to a burst of free radical production,
causing oxidative stress and further cell damage.
B: Swelling occurs, but the specific mechanism of reperfusion injury is oxidative stress.
C: Vessels typically dilate or are damaged, not constrict too tightly as the primary injury mechanism.
D: ICP usually increases due to edema, not drops.
, 7. To offset the damage caused by free radicals stealing electrons, the body utilizes:
A. Increased heart rate.
B. Antioxidants which share extra electrons.
C. Vasoconstriction of cerebral vessels.
D. Increased production of CSF.
ANSWER: B
Rationale:
A: Heart rate changes do not neutralize free radicals.
B: Correct. Antioxidants have extra electrons that they can donate to free radicals, stabilizing them and
preventing them from stealing electrons from healthy cell components.
C: Vasoconstriction affects blood flow, not chemical neutralization of radicals.
D: Increased CSF would worsen ICP.
8. The nurse understands that "Compliance" in the context of ICP refers to:
A. The patient's adherence to medication.
B. The ability of the cranium to accommodate changes in volume without increasing pressure.
C. The rigidity of the skull bones.
D. The speed at which CSF is produced.
ANSWER: B
Rationale:
A: This is general medical compliance, not the physiological definition regarding ICP.
B: Correct. Compliance is the capacity of the intracranial compartment to expand or adjust to volume
changes before pressure rises significantly.
C: Rigidity is the opposite of compliance.
D: Production speed is a factor, but compliance is about accommodation.
9. Which of the following is considered an "Initial Sign" of increased ICP?
A. Sluggish pupils.
B. Coma.
C. Headache and vomiting.
D. Cushing's Triad.
1. A nursing student is reviewing the Monroe-Kellie hypothesis. Which statement by the student
indicates a correct understanding of the components that compose the volume of the cranium?
A. "The cranium contains brain tissue, lymph, and arterial blood."
B. "The volume is determined by neurons, glial cells, and interstitial fluid."
C. "The three elements are brain tissue, cerebral spinal fluid (CSF), and blood."
D. "The cranium is composed of bone, meninges, and cerebrospinal fluid."
ANSWER: C
Rationale:
A: Lymph is not considered one of the three primary volume components in the Monroe-Kellie
hypothesis.
B: While neurons and glial cells make up the tissue, the hypothesis categorizes the volume broadly as
tissue, fluid, and blood.
C: Correct. The Monroe-Kellie hypothesis states that the cranial vault is a rigid container holding three
components: brain tissue, CSF, and blood.
D: Bone and meninges are structures, but the volume components that can fluctuate and affect pressure
are tissue, CSF, and blood.
2. A patient with right-sided heart failure is admitted to the unit. The nurse understands that this
condition can lead to increased intracranial pressure (ICP) primarily due to:
A. Decreased production of cerebral spinal fluid.
B. An increase in central venous pressure affecting blood volume in the cranium.
C. Atrial dilation causing a decrease in cerebral blood flow.
D. Hyperventilation leading to cerebral vasoconstriction.
ANSWER: B
Rationale:
A: Heart failure does not typically decrease CSF production; it affects fluid dynamics.
,B: Correct. Heart failure leads to an increase in central venous pressure. Since the venous system drains
the brain, increased pressure here increases the blood volume within the cranium, raising ICP.
C: Atrial dilation is a sign of volume overload, but the mechanism for increased ICP is the backup of
venous blood, not a decrease in flow.
D: Hyperventilation usually decreases ICP by causing vasoconstriction; heart failure does not inherently
cause hyperventilation as a primary mechanism for ICP rise.
3. According to the Monroe-Kellie hypothesis, if there is an increase in the volume of one intracranial
component, what is the expected physiological response?
A. The cranial bones will expand to accommodate the volume.
B. There will be a compensatory decrease in one or both of the other components.
C. Intracranial pressure will remain stable due to high compliance.
D. Cerebral spinal fluid production will immediately stop.
ANSWER: B
Rationale:
A: The adult cranium is rigid and cannot expand.
B: Correct. This is the core of the Monroe-Kellie hypothesis: an increase in one component (e.g., blood)
must be compensated for by a decrease in another (e.g., CSF or blood displacement) to maintain normal
pressure.
C: Pressure will eventually rise if compensation fails; compliance is limited.
D: CSF production is continuous; it may be displaced or absorbed faster, but production doesn't just
stop.
4. The nurse is caring for a patient with a brain tumor. The nurse identifies that the tumor is causing
increased ICP primarily because:
A. It acts as a space-occupying lesion.
B. It causes systemic hypotension.
C. It increases the production of antioxidants.
D. It leads to a decrease in cerebral blood volume.
ANSWER: A
Rationale:
A: Correct. A tumor is a "space-occupying lesion" that adds volume to the fixed cranial space, directly
increasing ICP.
,B: Systemic hypotension would decrease cerebral perfusion, not necessarily increase ICP directly
(though it causes ischemia).
C: Antioxidants are protective; tumors do not increase them to raise ICP.
D: A tumor usually compresses vessels or adds volume; it doesn't primarily cause a decrease in blood
volume as the mechanism for high ICP.
5. Which pathophysiological process is described as the "stealing of an electron" from fully paired
atoms, leading to damage of cell components?
A. Ischemia
B. Oxidative stress caused by free radicals
C. ATP depletion
D. Cytotoxic edema
ANSWER: B
Rationale:
A: Ischemia is lack of blood flow.
B: Correct. Free radicals are unstable atoms that steal electrons from other atoms to stabilize
themselves, causing oxidative stress and cell damage (Reperfusion Injury).
C: ATP depletion is the lack of energy, not the electron stealing mechanism itself.
D: Cytotoxic edema is cellular swelling, a result of injury, not the electron stealing process.
6. A patient has suffered a stroke and blood flow is restored (reperfusion). The nurse monitors for
"Reperfusion Injury." What is the primary mechanism of this secondary injury?
A. The sudden influx of oxygen leads to the formation of free radicals.
B. The brain cells swell due to lack of glucose.
C. The blood vessels constrict too tightly.
D. The intracranial pressure drops too low.
ANSWER: A
Rationale:
A: Correct. When oxygen returns to ischemic tissue, it can lead to a burst of free radical production,
causing oxidative stress and further cell damage.
B: Swelling occurs, but the specific mechanism of reperfusion injury is oxidative stress.
C: Vessels typically dilate or are damaged, not constrict too tightly as the primary injury mechanism.
D: ICP usually increases due to edema, not drops.
, 7. To offset the damage caused by free radicals stealing electrons, the body utilizes:
A. Increased heart rate.
B. Antioxidants which share extra electrons.
C. Vasoconstriction of cerebral vessels.
D. Increased production of CSF.
ANSWER: B
Rationale:
A: Heart rate changes do not neutralize free radicals.
B: Correct. Antioxidants have extra electrons that they can donate to free radicals, stabilizing them and
preventing them from stealing electrons from healthy cell components.
C: Vasoconstriction affects blood flow, not chemical neutralization of radicals.
D: Increased CSF would worsen ICP.
8. The nurse understands that "Compliance" in the context of ICP refers to:
A. The patient's adherence to medication.
B. The ability of the cranium to accommodate changes in volume without increasing pressure.
C. The rigidity of the skull bones.
D. The speed at which CSF is produced.
ANSWER: B
Rationale:
A: This is general medical compliance, not the physiological definition regarding ICP.
B: Correct. Compliance is the capacity of the intracranial compartment to expand or adjust to volume
changes before pressure rises significantly.
C: Rigidity is the opposite of compliance.
D: Production speed is a factor, but compliance is about accommodation.
9. Which of the following is considered an "Initial Sign" of increased ICP?
A. Sluggish pupils.
B. Coma.
C. Headache and vomiting.
D. Cushing's Triad.
