, NR 507 Advanced Pathophysiology:
Week 2 High-Yield Questions, Answers,
& Rationales 2026/2027 Update
Question 1: Pain Pathophysiology - Nerve Fibers
A patient experiences a sudden, sharp, and well-localized pain
immediately after touching a hot stove. Which type of afferent
nerve fiber is primarily responsible for transmitting this initial
rapid pain signal to the spinal cord?
A. C fibers
B. A-beta fibers
C. A-delta fibers
D. Sympathetic postganglionic fibers
Correct Answer: C. A-delta fibers.
Explanation: A-delta fibers are lightly myelinated and rapidly
transmit sharp, acute, well-localized pain sensations (such as a
burn or pinprick). In contrast, C fibers are unmyelinated,
transmit signals slowly, and are responsible for the dull, aching,
or throbbing pain that follows the initial injury.
Question 2: Neurologic Alterations - Intracranial Pressure
(ICP)
A patient with a traumatic brain injury develops an expanding
epidural hematoma. As intracranial pressure (ICP) rises
significantly, the nurse observes a specific pattern of vital sign
changes known as Cushing's triad. Which set of clinical signs
characterizes Cushing's triad?
, A. Tachycardia, hypotension, and tachypnea.
B. Bradycardia, widened pulse pressure (systolic
hypertension), and irregular respirations.
C. Tachycardia, narrowed pulse pressure, and shallow
breathing.
D. Bradycardia, hypotension, and Cheyne-Stokes
respirations.
Correct Answer: B. Bradycardia, widened pulse pressure
(systolic hypertension), and irregular respirations.
Explanation: Cushing's triad is a late and ominous sign of
severely increased ICP and impending brain herniation. The
body attempts to force blood into the high-pressure brain by
raising systolic blood pressure (widening pulse pressure), which
triggers a reflex bradycardia via baroreceptors. Pressure on the
brainstem causes irregular respiratory patterns.
Question 3: Neurologic Alterations - Cerebral Edema
Which type of cerebral edema is caused by increased
permeability of the capillary endothelium of the brain after
injury to the vascular structure (blood-brain barrier), allowing
plasma proteins to leak into the extracellular space?
A. Cytotoxic edema
B. Interstitial edema
C. Vasogenic edema
D. Ischemic edema
Correct Answer: C. Vasogenic edema.
, Explanation: Vasogenic edema is the most common form of
cerebral edema. It occurs when the blood-brain barrier is
disrupted (e.g., by trauma, tumors, or inflammation), allowing
fluid and proteins to leak from the intravascular space into the
interstitial space of the brain.
Question 4: Traumatic Brain Injury - Hematomas
A 22-year-old male is struck in the head with a baseball bat. He
briefly loses consciousness, wakes up and acts normally for an
hour (lucid interval), but then rapidly deteriorates into a coma.
Which type of intracranial hemorrhage is most consistent with
this classic clinical presentation?
A. Subdural hematoma
B. Extradural (epidural) hematoma
C. Subarachnoid hemorrhage
D. Intracerebral hemorrhage
Correct Answer: B. Extradural (epidural) hematoma.
Explanation: Epidural hematomas typically result from arterial
bleeding (most commonly a tear in the middle meningeal artery)
between the skull and the dura mater. The classic presentation
includes a brief loss of consciousness, followed by a "lucid
interval," and then rapid neurological collapse as the arterial
bleed quickly compresses the brain.
Question 5: Neurologic Alterations - Cerebrovascular
Accidents
A 65-year-old patient presents to the emergency department
with sudden onset of right-sided hemiparesis, right-sided facial
Week 2 High-Yield Questions, Answers,
& Rationales 2026/2027 Update
Question 1: Pain Pathophysiology - Nerve Fibers
A patient experiences a sudden, sharp, and well-localized pain
immediately after touching a hot stove. Which type of afferent
nerve fiber is primarily responsible for transmitting this initial
rapid pain signal to the spinal cord?
A. C fibers
B. A-beta fibers
C. A-delta fibers
D. Sympathetic postganglionic fibers
Correct Answer: C. A-delta fibers.
Explanation: A-delta fibers are lightly myelinated and rapidly
transmit sharp, acute, well-localized pain sensations (such as a
burn or pinprick). In contrast, C fibers are unmyelinated,
transmit signals slowly, and are responsible for the dull, aching,
or throbbing pain that follows the initial injury.
Question 2: Neurologic Alterations - Intracranial Pressure
(ICP)
A patient with a traumatic brain injury develops an expanding
epidural hematoma. As intracranial pressure (ICP) rises
significantly, the nurse observes a specific pattern of vital sign
changes known as Cushing's triad. Which set of clinical signs
characterizes Cushing's triad?
, A. Tachycardia, hypotension, and tachypnea.
B. Bradycardia, widened pulse pressure (systolic
hypertension), and irregular respirations.
C. Tachycardia, narrowed pulse pressure, and shallow
breathing.
D. Bradycardia, hypotension, and Cheyne-Stokes
respirations.
Correct Answer: B. Bradycardia, widened pulse pressure
(systolic hypertension), and irregular respirations.
Explanation: Cushing's triad is a late and ominous sign of
severely increased ICP and impending brain herniation. The
body attempts to force blood into the high-pressure brain by
raising systolic blood pressure (widening pulse pressure), which
triggers a reflex bradycardia via baroreceptors. Pressure on the
brainstem causes irregular respiratory patterns.
Question 3: Neurologic Alterations - Cerebral Edema
Which type of cerebral edema is caused by increased
permeability of the capillary endothelium of the brain after
injury to the vascular structure (blood-brain barrier), allowing
plasma proteins to leak into the extracellular space?
A. Cytotoxic edema
B. Interstitial edema
C. Vasogenic edema
D. Ischemic edema
Correct Answer: C. Vasogenic edema.
, Explanation: Vasogenic edema is the most common form of
cerebral edema. It occurs when the blood-brain barrier is
disrupted (e.g., by trauma, tumors, or inflammation), allowing
fluid and proteins to leak from the intravascular space into the
interstitial space of the brain.
Question 4: Traumatic Brain Injury - Hematomas
A 22-year-old male is struck in the head with a baseball bat. He
briefly loses consciousness, wakes up and acts normally for an
hour (lucid interval), but then rapidly deteriorates into a coma.
Which type of intracranial hemorrhage is most consistent with
this classic clinical presentation?
A. Subdural hematoma
B. Extradural (epidural) hematoma
C. Subarachnoid hemorrhage
D. Intracerebral hemorrhage
Correct Answer: B. Extradural (epidural) hematoma.
Explanation: Epidural hematomas typically result from arterial
bleeding (most commonly a tear in the middle meningeal artery)
between the skull and the dura mater. The classic presentation
includes a brief loss of consciousness, followed by a "lucid
interval," and then rapid neurological collapse as the arterial
bleed quickly compresses the brain.
Question 5: Neurologic Alterations - Cerebrovascular
Accidents
A 65-year-old patient presents to the emergency department
with sudden onset of right-sided hemiparesis, right-sided facial
