Chapter 13 Dynamic Study Module 1

What is the function of gray matter in the spinal cord?

A sensory and motor relay, or synapse area

Which of the following is/are true of the peripheral nervous system (PNS)?

All of the listen responses are correct. (Spinal nerves connect to the spinal cord. Cranial nerves connect to the brain. Neural bodies are located in ganglia.)

Which of the following statements about meninges is FALSE?

An epidural block is a dose of anesthetic given in the subdural space.

What portion of the spinal cord is the control area for somatic motor neurons that stimulate skeletal muscles?

Anterior gray horns

The axons in the white matter of the spinal cord that carry sensory information up toward the brain are organized into

Ascending tracts

Which of the following are composed of myelinated fibers carrying information toward the brain?

Ascending tracts

Anatomically, the spinal cord is part of the ______, and the spinal nerves are part of the _______.

CNS; PNS

The collection of dorsal and ventral roots that continues through the vertebral canal and resembles a horse's tail is the

Cauda equina

What is the term for the expanded segment of the spinal cord where nerves that serve the shoulder and upper limbs exit?

Cervical enlargement

The dura mater attaches itself at its base to the skeletal system through what structure(s)?

Coccygeal ligament

Which of the spinal meninges is the outermost dense, collagenous layer?

Dura mater

Which of the following is NOT found in the CNS?

Neuron cell bodies located in ganglia

What part of the gray matter in the spinal cord contains somatic and visceral sensory nuclei?

Posterior gray horns

Where are reflex centers found?

The brain and spinal cord

The cauda equina is a complex of the spinal ore that includes

The filum terminale and the ventral and dorsal roots caudal to the conus medullaris.

Which of the following statements about the spinal cord is FALSE?

The spinal cord is part of the PNS.

Sensory information from the lower portion of your body will be conducted to the spinal cord by sensory neurons. How do sensory neuron enter the spinal cord?

Through dorsal roots of spinal nerves.

In the spinal cord, the cerebrospinal fluid is found within the

central canal and subarachnoid space

The area of the spinal cord that surrounds the central canal and is dominated by the cell bodies of neurons and glial cells is the

gray matter

The meninx that is firmly bound to neural tissue and is deeper than the other meninges is the

pia mater

What is the composition of the tracts in the CNS that link the brain with the rest of the body?

sensory and motor pathways

The posterior gray horns of the spinal cord contain

somatic and visceral sensory nuclei

To withdraw cerebrospinal fluid during a spinal tap, a needle is inserted into the

subarachnoid space

The white matter of the spinal cord contains

Large numbers of myelinated and unmyelinated axons

Which term is given to the projections of gray matter toward the outer surface of the spinal cord?

Horns