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Module 4 - Sensory System Verified and
Updated Questions and Answers (100%
Correct Answers)
In the somatosensory system, the different qualities of sensation that we experience
(pain, temperature, vibration, discriminative touch and proprioception) are due to:
Answer: • The specific type of receptors that are stimulated by the each modality.
• The specific pathways that carry this information to the brain.
• The specific neurons in the sensory cortex that interpret the respective sensory
modalities.
when we touch an object that is not painful, and want to appreciate the contour,
texture, shape, and weight of the object, the sensory receptors stimulated are
Answer: Meissner's corpuscles
Meissner's corpuscles are concentrated in areas that are particularly sensitive to
Answer: discriminative touch, such as the tips of the fingers and the lips
when we make contact with an object that is potentially noxious, something that
elicits pain, the sensory receptors stimulated are
Answer: free nerve endings
The spinal cord is the conduit between the
Answer: brain and the body - it relays all of the sensory
information from the body to the brain and all of the motor information from the
brain to the body.
The spinal cord contains intricate _______ (e.g., forming spinal reflexes) and major
components of the _________.
Answer: The spinal cord contains intricate local circuitry (e.g., forming spinal
reflexes) and major components of the autonomic nervous system.
The spinal cord begins at the _______ and extends, in the adult, to the _________
vertebrae.
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Answer: The spinal cord begins at the base of the brain near the foramen magnum
and extends, in the adult, to the first or second lumbar vertebrae.
There are four regions of the spinal cord, which correspond to the location at which
the paired spinal nerves exit and enter the vertebral column -
Answer: cervical, thoracic, lumbar and sacral.
There are ___ cervical, ___ thoracic,
___ lumbar and ___ sacral spinal nerves that provide motor output to specific muscles
and relay sensory input from specific dermatomal levels
Answer: 8 cervical, 12 thoracic,
5 lumbar and 5 sacral spinal nerves
The spinal cord is comprised of a peripheral zone of ______ matter and a central
butterflyshaped zone of _____ matter.
Answer: The spinal cord is comprised of a peripheral zone of white matter and a
central butterflyshaped zone of gray matter.
The white matter consists of ________ organized into _________, while the gray matter
consists of ________________________
Answer: The white matter consists of ascending and descending axonal fiber
pathways organized into funiculi or columns (the dorsal, lateral and ventral funiculi),
while the gray matter consists of nuclei arranged in horns (dorsal, intermediate and
ventral horns)
In general, motor pathways that traverse the spinal cord consist of a :
Answer: two-neuron pathway
Motor Pathway Ex.
A ___________ located in the primary motor cortex projects to the ______________, an
anterior horn cell in the spinal cord, which then projects to muscle fibers to produce
movement (axons leave the spinal cord via the ventral root).
Answer: Ex. A first-order neuron located in the primary motor cortex projects to the
second-order neuron, an anterior horn cell in the spinal cord, which then projects to
muscle fibers to produce movement (axons leave the spinal cord via the ventral root).
In general, most of the sensory pathways that traverse the spinal cord consist of a
Answer: threeneuron
pathway
Module 4 - Sensory System Verified and
Updated Questions and Answers (100%
Correct Answers)
In the somatosensory system, the different qualities of sensation that we experience
(pain, temperature, vibration, discriminative touch and proprioception) are due to:
Answer: • The specific type of receptors that are stimulated by the each modality.
• The specific pathways that carry this information to the brain.
• The specific neurons in the sensory cortex that interpret the respective sensory
modalities.
when we touch an object that is not painful, and want to appreciate the contour,
texture, shape, and weight of the object, the sensory receptors stimulated are
Answer: Meissner's corpuscles
Meissner's corpuscles are concentrated in areas that are particularly sensitive to
Answer: discriminative touch, such as the tips of the fingers and the lips
when we make contact with an object that is potentially noxious, something that
elicits pain, the sensory receptors stimulated are
Answer: free nerve endings
The spinal cord is the conduit between the
Answer: brain and the body - it relays all of the sensory
information from the body to the brain and all of the motor information from the
brain to the body.
The spinal cord contains intricate _______ (e.g., forming spinal reflexes) and major
components of the _________.
Answer: The spinal cord contains intricate local circuitry (e.g., forming spinal
reflexes) and major components of the autonomic nervous system.
The spinal cord begins at the _______ and extends, in the adult, to the _________
vertebrae.
, Inquire through: | Professional | Confidential Support
Answer: The spinal cord begins at the base of the brain near the foramen magnum
and extends, in the adult, to the first or second lumbar vertebrae.
There are four regions of the spinal cord, which correspond to the location at which
the paired spinal nerves exit and enter the vertebral column -
Answer: cervical, thoracic, lumbar and sacral.
There are ___ cervical, ___ thoracic,
___ lumbar and ___ sacral spinal nerves that provide motor output to specific muscles
and relay sensory input from specific dermatomal levels
Answer: 8 cervical, 12 thoracic,
5 lumbar and 5 sacral spinal nerves
The spinal cord is comprised of a peripheral zone of ______ matter and a central
butterflyshaped zone of _____ matter.
Answer: The spinal cord is comprised of a peripheral zone of white matter and a
central butterflyshaped zone of gray matter.
The white matter consists of ________ organized into _________, while the gray matter
consists of ________________________
Answer: The white matter consists of ascending and descending axonal fiber
pathways organized into funiculi or columns (the dorsal, lateral and ventral funiculi),
while the gray matter consists of nuclei arranged in horns (dorsal, intermediate and
ventral horns)
In general, motor pathways that traverse the spinal cord consist of a :
Answer: two-neuron pathway
Motor Pathway Ex.
A ___________ located in the primary motor cortex projects to the ______________, an
anterior horn cell in the spinal cord, which then projects to muscle fibers to produce
movement (axons leave the spinal cord via the ventral root).
Answer: Ex. A first-order neuron located in the primary motor cortex projects to the
second-order neuron, an anterior horn cell in the spinal cord, which then projects to
muscle fibers to produce movement (axons leave the spinal cord via the ventral root).
In general, most of the sensory pathways that traverse the spinal cord consist of a
Answer: threeneuron
pathway
