Like this study set? Create a free account to save it.

Sign up for an account

Already have a Quizlet account? .

Create an account

Exercise 25 (p. 193)

The nervous system is divided into two parts:

the (1) Central Nervous System (CNS), and the (2) Peripheral Nervous System (PNS).

The CNS consists of the

brain and spinal cord.

The PNS consists of the

cranial nerves and spinal nerves.

Nerve tissue is made up of two types of cells:

neurons and neuroglia.

The basic structural and functional units of the nervous system are

the neurons.

The functions of neurons include:

(1) detecting stimuli, (2) conducting impulses, (3) some involvement in decision-making.

The parts of a neuron include the:

(1) cell body, (2) dendrites, and (3) the axon.

The nucleus of a neuron is housed in the

cell body.


bring information toward the cell body.

The axon

takes information away from the cell body.

The axon is a _____ process than are the dendrites.


Neurons can be categorized into the three following structural types:

(1) unipolar, (2) bipolar, and (3) multipolar.

The most common structural type of neurons are

unipolar neurons.

Bipolar neurons

are associated with special senses.

Multipolar neurons are found in the


Neurons can be categorized into the three following functional types:

(1) sensory (afferent), (2) motor (efferent), and (3) interneurons (association or internucial).

Most sensory neurons are

unipolar, but some are bipolar.

Sensory neurons conduct action potentials

toward the CNS.

Motor neurons are classified structurally as


Motor neurons conduct action potentials

away from the CNS.

Interneurons are classified structurally as


Interneurons form

links between other neurons.

Interneurons are found in the

brain and spinal cord.

Neuroglia is the metaphorical ____ of the nervous system.


Neuroglia act as

protective and supportive cells of the nervous system.

There are ____ types of neuroglia.


The CNS has four types of neuroglia:

(1) astrocytes, (2) microglia, (3) ependyma, and (4) oligodendrocytes.

Astrocytes are the ____ neuroglia of the CNS.


The neuroglia of the CNS that performs an immune function is the


Ependyma covers the insides of the

ventricles, or spaces in the brain.

Oligodendrocytes of the CNS produce


This neuroglia is either cuboidal or columnar and sometimes has cilia


List the neuroglia of the CNS in order of most processes to least processes:

astrocytes, oligodendrocytes, and microglia.

The PNS has two types of neuroglia:

(1) Schwann, and (2) satellite.

The Schwann cells, a type of neuroglia of the PNS, produce


The function of the satellite cells is


Please allow access to your computer’s microphone to use Voice Recording.

Having trouble? Click here for help.

We can’t access your microphone!

Click the icon above to update your browser permissions and try again


Reload the page to try again!


Press Cmd-0 to reset your zoom

Press Ctrl-0 to reset your zoom

It looks like your browser might be zoomed in or out. Your browser needs to be zoomed to a normal size to record audio.

Please upgrade Flash or install Chrome
to use Voice Recording.

For more help, see our troubleshooting page.

Your microphone is muted

For help fixing this issue, see this FAQ.

Star this term

You can study starred terms together

Voice Recording