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

Sign up for an account

Already have a Quizlet account? .

Create an account

myelin sheath

fatty insulating sheath that surrrounds all bu the smallest nerve fibers

motor (efferent nerves)

nerves that carry impulses leaving the brain and spinal cord, and destines foreffectors

brain stem

collectively the mid brain, pons and medulla of the brain


collection of nerve cell bodies outside the CNS


a type of CNS supporting cell that composes myelin sheaths


a bundle of axons in the peripheral nervous system (PNS)

basal nuclei (basal ganglia)

specific gray matter areas located deep within the cerebral hemisphere


brain region most involved in producing smooth, coordinated skeletal muscle ctivity

neuron (nerve cell)

cell of nervous system specialized to generate and transmit electrial signals (action portentials and graded potentials)

schwann cell

type of supporting cell in peripheral nervous system forms myelin sheath vital to peripheral nerve fiber regeneration

Node of ranvier(myselin sheath gaps)

gaps between schwann cells

archnoid mater

middle layer of the three meniges (weblike)


functionsl junction or point of close contact between two nervous or between a neuron and an effector cell

neuron cell body

the biosynthetic center of a neuron also called the perikaryon or soma cerebrospinal fluid (CSF) plasmalike fluid that fills the cavities of the SNA and surrounds the CNS externally protects the brain and spinal cord

central sulcus

sulci(furrows); the central sulcus which lies in the frontal plan separates the frontal lobe from the parietal lobe

cerebral hemisphere

the cerebral hemisphere and the structures of the diencephalon

postsynaptic neuron

the neuron transmitting the electrual signal away from the synapse

presynaptic neuron

the neuron conducting impulses toward th synapse

graded potential

local change in membrane potentail that varies directly with strength of stimulus declines with distance


neuron process that carries impulses away form the nerve cell body; the conducting portion of a nerve cell


branching neuron process that serves as a receptive, or input region; transmits an electrical signal toward the cell body

sensory (afferent) nerves

contain process of sensory neurons, carry impulses to CNS

cerebrospinal fluid (CSF)

plasma like fluid that filled the cavities of the CNS and surrounds the CNS externally; protects the brain and spinal cord


connect corresponding gray areas of the two hemispheres

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