UT Arlington NURS 5315 Exam 4 (pdf) | 2026/2027 | Advanced
Pathophysiology Q&A | Pathophysiology
1. Which of the following best describes the primary function of the
ascending pathways in the nervous system?
A) To transmit motor commands from the brain to the periphery
B) To carry sensory information from the periphery toward the central
nervous system
C) To regulate autonomic functions such as heart rate and respiration
D) To coordinate complex motor movements via the cerebellum
Correct Answer: To carry sensory information from the periphery toward the
central nervous system
Rationale: Ascending pathways, or ascending tracts, are sensory pathways
that carry information from peripheral receptors toward the brain for
processing. Descending pathways transmit motor commands.
2. Which type of axon transmits a nerve impulse at the highest rate?
A) Small unmyelinated axons
B) Small myelinated axons
C) Large unmyelinated axons
D) Large myelinated axons
Correct Answer: Large myelinated axons
Rationale: Large myelinated axons have the fastest conduction velocity due
to saltatory conduction, where the impulse "jumps" between nodes of
Ranvier. This allows for rapid transmission of signals.
3. Which nerves are capable of regeneration after injury?
A) Myelinated nerves in the central nervous system
B) Unmyelinated nerves in the peripheral nervous system
C) Myelinated nerves in the peripheral nervous system
,D) All nerves in the central nervous system
Correct Answer: Myelinated nerves in the peripheral nervous system
Rationale: Myelinated nerves in the peripheral nervous system (PNS) have
the capacity for regeneration, as Schwann cells provide a pathway for
regrowth. Central nervous system neurons typically do not regenerate.
4. The neurotransmitter norepinephrine is secreted in which part of the
nervous system?
A) Sympathetic preganglion
B) Sympathetic postganglion
C) Parasympathetic preganglion
D) Parasympathetic postganglion
Correct Answer: Sympathetic postganglion
Rationale: Norepinephrine is the primary neurotransmitter released by
sympathetic postganglionic neurons, mediating the "fight-or-flight" response.
Acetylcholine is released at sympathetic preganglionic and all
parasympathetic junctions.
5. Both oligodendroglia and Schwann cells share the ability to perform which
function?
A) Phagocytize cellular debris
B) Form a myelin sheath
C) Regulate the blood-brain barrier
D) Produce cerebrospinal fluid
Correct Answer: Form a myelin sheath
Rationale: Oligodendrocytes in the central nervous system and Schwann
cells in the peripheral nervous system are both glial cells responsible for
forming the myelin sheath around axons.
,6. During a synapse, what change occurs after the neurotransmitter binds to
the receptor?
A) The presynaptic neuron releases more neurotransmitter
B) The permeability of the postsynaptic neuron changes
C) The postsynaptic neuron immediately dies
D) The neurotransmitter is reabsorbed into the synaptic cleft
Correct Answer: The permeability of the postsynaptic neuron changes
Rationale: When a neurotransmitter binds to a receptor on the postsynaptic
neuron, it alters the membrane permeability, typically allowing ions to flow in
or out, which changes the membrane potential.
7. Which structure is a large network of neurons within the brainstem
essential for maintaining wakefulness?
A) Limbic system
B) Reticular activating system
C) Basal ganglia
D) Cerebellum
Correct Answer: Reticular activating system
Rationale: The reticular activating system (RAS) is a network of neurons in
the brainstem that plays a critical role in regulating wakefulness, arousal,
and sleep-wake transitions.
8. Thought and goal-oriented behaviors are functions of which area of the
brain?
A) Occipital lobe
B) Temporal lobe
C) Prefrontal lobe
D) Parietal lobe
Correct Answer: Prefrontal lobe
, Rationale: The prefrontal cortex is responsible for higher-order cognitive
functions, including thought, decision-making, goal-oriented behaviors, and
personality.
9. The region responsible for the motor aspects of speech is located in which
area?
A) Wernicke area in the temporal lobe
B) Broca area in the frontal lobe
C) Primary motor cortex in the parietal lobe
D) Auditory association area in the occipital lobe
Correct Answer: Broca area in the frontal lobe
Rationale: Broca's area, typically located in the left frontal lobe, is
responsible for the motor aspects of speech production. Damage results in
expressive aphasia.
10. Parkinson disease and Huntington disease are conditions associated with
defects in which area of the brain?
A) Cerebellum
B) Hippocampus
C) Basal ganglia
D) Hypothalamus
Correct Answer: Basal ganglia
Rationale: The basal ganglia are a group of subcortical nuclei that are crucial
for motor control. Parkinson disease (dopamine depletion) and Huntington
disease (genetic degeneration) are both associated with dysfunction in this
area.
11. Maintenance of a constant internal environment and implementation of
behavioral patterns are main functions of which area of the brain?
A) Thalamus
Pathophysiology Q&A | Pathophysiology
1. Which of the following best describes the primary function of the
ascending pathways in the nervous system?
A) To transmit motor commands from the brain to the periphery
B) To carry sensory information from the periphery toward the central
nervous system
C) To regulate autonomic functions such as heart rate and respiration
D) To coordinate complex motor movements via the cerebellum
Correct Answer: To carry sensory information from the periphery toward the
central nervous system
Rationale: Ascending pathways, or ascending tracts, are sensory pathways
that carry information from peripheral receptors toward the brain for
processing. Descending pathways transmit motor commands.
2. Which type of axon transmits a nerve impulse at the highest rate?
A) Small unmyelinated axons
B) Small myelinated axons
C) Large unmyelinated axons
D) Large myelinated axons
Correct Answer: Large myelinated axons
Rationale: Large myelinated axons have the fastest conduction velocity due
to saltatory conduction, where the impulse "jumps" between nodes of
Ranvier. This allows for rapid transmission of signals.
3. Which nerves are capable of regeneration after injury?
A) Myelinated nerves in the central nervous system
B) Unmyelinated nerves in the peripheral nervous system
C) Myelinated nerves in the peripheral nervous system
,D) All nerves in the central nervous system
Correct Answer: Myelinated nerves in the peripheral nervous system
Rationale: Myelinated nerves in the peripheral nervous system (PNS) have
the capacity for regeneration, as Schwann cells provide a pathway for
regrowth. Central nervous system neurons typically do not regenerate.
4. The neurotransmitter norepinephrine is secreted in which part of the
nervous system?
A) Sympathetic preganglion
B) Sympathetic postganglion
C) Parasympathetic preganglion
D) Parasympathetic postganglion
Correct Answer: Sympathetic postganglion
Rationale: Norepinephrine is the primary neurotransmitter released by
sympathetic postganglionic neurons, mediating the "fight-or-flight" response.
Acetylcholine is released at sympathetic preganglionic and all
parasympathetic junctions.
5. Both oligodendroglia and Schwann cells share the ability to perform which
function?
A) Phagocytize cellular debris
B) Form a myelin sheath
C) Regulate the blood-brain barrier
D) Produce cerebrospinal fluid
Correct Answer: Form a myelin sheath
Rationale: Oligodendrocytes in the central nervous system and Schwann
cells in the peripheral nervous system are both glial cells responsible for
forming the myelin sheath around axons.
,6. During a synapse, what change occurs after the neurotransmitter binds to
the receptor?
A) The presynaptic neuron releases more neurotransmitter
B) The permeability of the postsynaptic neuron changes
C) The postsynaptic neuron immediately dies
D) The neurotransmitter is reabsorbed into the synaptic cleft
Correct Answer: The permeability of the postsynaptic neuron changes
Rationale: When a neurotransmitter binds to a receptor on the postsynaptic
neuron, it alters the membrane permeability, typically allowing ions to flow in
or out, which changes the membrane potential.
7. Which structure is a large network of neurons within the brainstem
essential for maintaining wakefulness?
A) Limbic system
B) Reticular activating system
C) Basal ganglia
D) Cerebellum
Correct Answer: Reticular activating system
Rationale: The reticular activating system (RAS) is a network of neurons in
the brainstem that plays a critical role in regulating wakefulness, arousal,
and sleep-wake transitions.
8. Thought and goal-oriented behaviors are functions of which area of the
brain?
A) Occipital lobe
B) Temporal lobe
C) Prefrontal lobe
D) Parietal lobe
Correct Answer: Prefrontal lobe
, Rationale: The prefrontal cortex is responsible for higher-order cognitive
functions, including thought, decision-making, goal-oriented behaviors, and
personality.
9. The region responsible for the motor aspects of speech is located in which
area?
A) Wernicke area in the temporal lobe
B) Broca area in the frontal lobe
C) Primary motor cortex in the parietal lobe
D) Auditory association area in the occipital lobe
Correct Answer: Broca area in the frontal lobe
Rationale: Broca's area, typically located in the left frontal lobe, is
responsible for the motor aspects of speech production. Damage results in
expressive aphasia.
10. Parkinson disease and Huntington disease are conditions associated with
defects in which area of the brain?
A) Cerebellum
B) Hippocampus
C) Basal ganglia
D) Hypothalamus
Correct Answer: Basal ganglia
Rationale: The basal ganglia are a group of subcortical nuclei that are crucial
for motor control. Parkinson disease (dopamine depletion) and Huntington
disease (genetic degeneration) are both associated with dysfunction in this
area.
11. Maintenance of a constant internal environment and implementation of
behavioral patterns are main functions of which area of the brain?
A) Thalamus
