Chapter 13 - The Spinal Cord and Spinal Nerves: Wiley Questions
In response to a muscle being stretched, a muscle spindle initiates a somatic spinal reflex that causes 1. contraction of the effector muscle. 2. relaxation of the antagonist muscle. 3. contraction of the antagonist muscle. 4. relaxation of the effector muscle.
1 and 2
Spinal nerves: 1. are part of the PNS. 2. connect the CNS to sensory receptors and effectors in all parts of the body. 3. are named according to the region of the vertebral column from which they emerge. 4. are mixed nerves. 5. only transmit sensory information. 6. only transmit motor information.
1, 2, 3 4
Sensory information travels to the brain via what?
Ascending tracts
What parts of a neuron within a nerve is/are wrapped in a protective endoneurium? 1. Myelinated axon 2. Unmyelinated axon 3. Dendrites
Both 1 and 2
Spinal nerve C8 exits between which two vertebrae?
C7-T1
In this diagram which structure is the conus medullaris?
E
A gymnast has damaged their hip flexor muscles. The nerve that innervates these muscles arise from which group of spinal nerves in this diagram?
F
In the diagram which structure contains nerve roots that arise from the lumbar, sacral, and coccygeal region of the spinal cord?
G
In this diagram where would somatic motor nuclei be located?
H
A nerve impulse initiated at a muscle spindle has to travel through which structure to enter the integrating center?
Posterior root of spinal nerve
The physician using a diagnostic probe stimulates the skin in the plantar surface of a patient, but the patient does not feel the sensation. Which nerves are probably damaged?
S1
What are examples of sensory tracts?
anterior spinothalamic and posterior columns
The white matter of the spinal cord is located where?
around the outside of the cord
The indicated structure contains what?
cell bodies of sensory neurons
The spinal cord ends between the first and second lumbar vertebrae. This area is called the what?
conus medullaris
What extends along the entire length of the spinal cord to protect the spinal cord against sudden displacement?
denticulate ligament
What is the list of the connective tissue coverings of the axons, fascicles, and entire nerve in the correct order
endoneurium, perineurium, epineurium
Which layer of protective connective tissue covers a nerve and fuses with the outer menix layer?
epineurium
Within a nerve, axons are bundled into what?
fascicles
Sensory and motor tracts within the spinal cord: - are separated into sensory tracts on the right and motor tracts on the left side of the spinal cord - have names that indicate the location of the initiation and termination of the nerve impulses they conduct - are located in the gray matter - all of these choices are correct
have names that indicate the location of the initiation and termination of the nerve impulses they conduct
Which part of a reflex arc can be monosynaptic or polysynaptic?
integrating center
If these structures were severed, the nerve impulses from pain and stretch receptors would not reach the spinal cord.
posterior root of spinal nerves
What statement best describes reciprocal innervation?
relaxation of antagonist at the same time of contraction of agonist
What is the sequence of the transmission of signals of a reflex arc?
sensory receptor, sensory neuron, integration center, motor neuron, effector
Which structure listed contains cerebrospinal fluid? - subarachnoid space - subdural space - epidural space - foramen magnum - posterior median sulcus
subarachnoid space