ADVANCED PATHOPHYSIOLOGY QUIZ 1 2026
QUESTIONS AND SOLUTIONS
◉ Portion of the nervous system responsible for sensation and
perception of pain can be divided into 3 areas: Answer: A: Afferent
pathways B interpretive centers in the brainstem, midbrain &
diencephalon C: descending pathways from the brain to the dorsal horn
of spinal cord.
◉ Nociceptors are pain receptors that detect a wide range of stimuli and
respond to: Answer: Chemical, mechanical, and thermal stimulation
◉ The afferent system is: Answer: Composed of nociceptors the dorsal
horn of the spinal column (second-order neurons) and afferent neurons
in the Aδ and C fibers (first-order neurons);spinothalamic tract (third-
order neurons).
◉ Myelinated Aδ receptor transmission is Answer: Fast and conveys
mechanical and thermal localized pain.
◉ Unmyelinated polymodal C fiber transmission is: Answer: Slower and
conveys sharp, diffuse burning and aching sensations
,◉ These primary-order neurons terminate on second-order neurons.
Answer:
◉ Three classes of second-order neurons modulate pain transmission:
Answer: projection cells, excitatory interneurons and inhibitory
interneurons.
◉ The second-order neurons are located: Answer: in the spinal cord
laminae
◉ The second-order neurons function as Answer: a pain gate to regulate
pain transmission.
◉ Second-order neurons cross over the cord and ascend primarily in
Answer: the lateral the spinothalamic tract to projection centers
including the thalamus reticular formation, and PAG matter.
◉ Third-order neurons carry information to the Answer: sensory cortex
and reticular and limbic systems for pain processing and interpretation.
◉ Efferent pathways from the PAG are responsible for modulation or
inhibition of afferent pain signals. Answer:
◉ The thalamus cortex, and postcentral gyrus perceive, describe, and
localize: Answer: Pain
, ◉ The reticular formation and limbic system control the Answer:
emotional and affective response to pain.
◉ Pain threshold is the point at which pain is perceived. Pain threshold
does not vary significantly among people or within the same person over
time. Answer:
◉ Pain tolerance is the duration of time or the intensity of pain that an
individual will ensure before initiating overt pain response. Answer:
◉ Tolerance varies widely among individuals and in the same individual
over time and in the same individual over time. Answer:
◉ Descending inhibitory or facilitatory pathways facilitate pain.
Answer:
◉ Segmental inhibition is the peripheral stimulation of nociceptors by
touch nuclei, and neurotransmitter inhibit or vibration or pressure
resulting in closure of the spinal cord pain gate. Answer:
◉ The higher brain centers also can Answer: influence painful stimuli
(heterosegmental control of nociception) as well as inhibition from the
caudal medulla (diffuse noxious inhibitory controls).
QUESTIONS AND SOLUTIONS
◉ Portion of the nervous system responsible for sensation and
perception of pain can be divided into 3 areas: Answer: A: Afferent
pathways B interpretive centers in the brainstem, midbrain &
diencephalon C: descending pathways from the brain to the dorsal horn
of spinal cord.
◉ Nociceptors are pain receptors that detect a wide range of stimuli and
respond to: Answer: Chemical, mechanical, and thermal stimulation
◉ The afferent system is: Answer: Composed of nociceptors the dorsal
horn of the spinal column (second-order neurons) and afferent neurons
in the Aδ and C fibers (first-order neurons);spinothalamic tract (third-
order neurons).
◉ Myelinated Aδ receptor transmission is Answer: Fast and conveys
mechanical and thermal localized pain.
◉ Unmyelinated polymodal C fiber transmission is: Answer: Slower and
conveys sharp, diffuse burning and aching sensations
,◉ These primary-order neurons terminate on second-order neurons.
Answer:
◉ Three classes of second-order neurons modulate pain transmission:
Answer: projection cells, excitatory interneurons and inhibitory
interneurons.
◉ The second-order neurons are located: Answer: in the spinal cord
laminae
◉ The second-order neurons function as Answer: a pain gate to regulate
pain transmission.
◉ Second-order neurons cross over the cord and ascend primarily in
Answer: the lateral the spinothalamic tract to projection centers
including the thalamus reticular formation, and PAG matter.
◉ Third-order neurons carry information to the Answer: sensory cortex
and reticular and limbic systems for pain processing and interpretation.
◉ Efferent pathways from the PAG are responsible for modulation or
inhibition of afferent pain signals. Answer:
◉ The thalamus cortex, and postcentral gyrus perceive, describe, and
localize: Answer: Pain
, ◉ The reticular formation and limbic system control the Answer:
emotional and affective response to pain.
◉ Pain threshold is the point at which pain is perceived. Pain threshold
does not vary significantly among people or within the same person over
time. Answer:
◉ Pain tolerance is the duration of time or the intensity of pain that an
individual will ensure before initiating overt pain response. Answer:
◉ Tolerance varies widely among individuals and in the same individual
over time and in the same individual over time. Answer:
◉ Descending inhibitory or facilitatory pathways facilitate pain.
Answer:
◉ Segmental inhibition is the peripheral stimulation of nociceptors by
touch nuclei, and neurotransmitter inhibit or vibration or pressure
resulting in closure of the spinal cord pain gate. Answer:
◉ The higher brain centers also can Answer: influence painful stimuli
(heterosegmental control of nociception) as well as inhibition from the
caudal medulla (diffuse noxious inhibitory controls).
