A&P 1 Lab 9
Which of the following branches of a spinal nerve has the somas of only sensory neurons?
Anterior (ventral) root Anterior ramus Meningeal Branch Posterior (dorsal) root*
spinal cord regions from superior to inferior
Cervical, Thoracic, Lumbar, Sacral, Coccygeal
spinal cord
Nerves that run up and down the length of the back and transmit most messages between the body and brain
The _________is the tapered end of the spinal cord.
conus medullaris
grey matter of spinal cord
deep
dorsal ramus
innervates skeletal muscles of the neck and back
phrenic nerve
innervates the diaphragm
sciatic nerve
largest nerve in the body
The ________lumbar region of the spinal cord gives rise to five pairs of spinal nerves.
lumbar
The ventral horn of the spinal cord contains cells bodies of
motor neurons
white matter
myelinated axons
A dorsal root ganglion contains cell bodies of
sensory neurons
Dorsal rami of spinal nerves innervate
skin and muscles of the back
ventral root
the basal branch of each spinal nerve; carries motor neurons
Simple spinal reflexes occur independent of the brain.
True or False TRUE
filum terminale
anchors spinal cord to coccyx
Cerebrospinal fluid fills the space between the _______
arachnoid mater and pia mater
Correctly label the following anatomical features of the spinal cord
Grey matter
cervical region
Know that it is in the lower half of the body.
Click and drag labels to identify the landmarks of the sympathetic nervous system.
Know this.
Which of the following is NOT considered a region of the spinal cord?
Lumbar Thoracic Sacral Pelvic*
Correctly label the following anatomical features of the spinal cord.
Meninges
peripheral nervous system Autonomic
-Involuntary -Lacrimal gland activation -Intestinal smooth muscle activation -Principally involved with movement of materials through the body -Sweat gland activation -Piloerector muscle activation -Can be excitatory on the target organ
peripheral nervous system Somatic
-Skeletal muscle activation -Principally involved with movement "of" the body
A simple spinal reflex typically involves how many neurons?
3
How many pair of spinal nerves are there?
31
Correctly label the following anatomical features of the spinal cord.
Posterior
A spinal nerve is formed by the union of
a dorsal and ventral root
Sensory stimuli enter the spinal cord via
afferent axons
dorsal root ganglion
cell bodies of sensory neurons
The _________region of the spinal cord gives rise to eight pairs of spinal nerves.
cervical
The anterior rami of the spinal nerves form nerve plexuses in all regions except the __________
cervical lumbar sacral thoracic*
Thoracic region
chest area
The __________is an extension of pia mater
filum terminale
Interneurons are located in the
spinal cord
conus medullaris
tapered end of spinal cord
The _______region of the spinal cord gives rise to twelve pairs of spinal nerves.
thoracic
Sensory receptors are found
throughout the body
