Chapter 17 Homework

filum terminale

The pia mater that extends from the conus medullaris to the coccyx is the

spinal cord

Vertebrae and vertebral ligaments protect the ______________________.

dura mater, arachnoid mater, pia mater

From the most superficial to most deep, the spinal meninges are

subarachnoid space

Between the arachnoid mater and the pia mater is the ______________________.

lateral gray horns

Cell bodies of motor neurons that supply smooth muscle, cardiac muscle, or glands via the autonomic nervous system can be found in the

subarachnoid space

Cerebrospinal fluid is found between two layers of the meninges, in a space called the

rootlets

How is a spinal nerve connected to the spinal cord?

long thoracic

Injury of which nerve could cause paralysis of the serratus anterior muscle?

radial

Injury to this nerve, even from an intramuscular injection, could cause wrist drop. What is the name of this injured nerve?

sensory neurons; motor neurons

Nerve impulses from _____ travel along the posterior root of spinal nerves and nerve impulses from _____ travel along the anterior root of spinal nerves.

deltoid muscle

Select the structure(s) served by the axillary nerve. deltoid muscle extensors of the wrist flexors of the wrist biceps brachii diaphragm

flexors of the wrist

Select the structure(s) served by the median nerve. quadriceps femoris muscle extensors of the wrist flexors of the wrist skin of superior portion of the chest and shoulder diaphragm

triceps brachii

Select the structure(s) served by the radial nerve. deltoid muscle triceps brachii flexors of the wrist skin of superior portion of the chest and shoulder diaphragm

motor

The anterior (ventral) rootlets carry ___________ impulses to the spinal nerves.

gray commissure

The central canal of the spinal cord is located in the center of the:

meninges

The connective tissue coverings that surround the brain and spinal cord are called the ___________________.

epidural

The space between the dura mater and the wall of the vertebral canal, which is normally filled with a cushion of fat and connective tissue, is called the _________ space.

L1-L2

The spinal cord in the adult normally extends to which vertebral level?

vertebral column, meninges, cerebrospinal fluid

The spinal cord is protected by

spinal nerves

These structures allow input from sensory receptors and output to muscles and glands to communicate to and from the spinal cord. What are they called?

central canal

This structure contains cerebrospinal fluid within the spinal cord. What is it called?

C1-C3

Trauma to which segment of the spinal cord will disrupt breathing to the extent that a ventilator needed for breathing?

cell bodies of sensory neurons

What does a posterior (dorsal) root ganglion contain?

a

What is the correct order of events in a reflex arc? a) stimulus, sensory receptor, sensory neuron, integrating center, motor neuron, effector b) stimulus, nerve impulse, sensory neuron, motor neuron, effector c) effector, sensory receptor, integrating center, motor neuron, nerve impulse d) stimulus, sensory receptor, integrating center, motor neuron, effector

shoulders and upper limbs

Which area of the body is served by the brachial plexus?

posterior (dorsal) gray horns

Which of the following contain cell bodies of interneurons?

posterior (dorsal) root

Which of the following contains sensory information ONLY? anterior (ventral) root anterior (ventral) ramus posterior (dorsal) root posterior (dorsal) ramus

skeletal muscle

Which of the following could serve as an effector for a somatic reflex? skeletal muscle smooth muscle cardiac muscle gland

sciatic

Which of the following nerves is NOT from the brachial plexus? musculocutaneous radial axillary sciatic ulnar

denticulate ligaments, filum terminale

Which of the following structures help to anchor the spinal cord and protect it against sudden displacement?

anterior gray horn

Which region of the spinal cord contains clusters of cell bodies of somatic motor neurons?

pia mater

Which spinal meninx is deep to the subarachnoid space?

T2-T12

Which spinal nerves DO NOT participate in forming a plexus? C1-C5 C5-T1 T2-T12 L1-L4 L4-S4

white matter of the spinal chord

contains ascending (sensory) and descending (motor) tracts.

meninges

the ______________________ include the dura mater, arachnoid mater, and pia mater.

conus medullaris

the tapering end of the spinal cord inferior to the lumbar enlargement.