Advertisement Upgrade to remove ads


a nerve cell; the basic building block of the nervous system.


specialized group of nerve cells that controls & coordinates activities of the nervous system


the portion of the vertebrate nervous system consisting of the brain and spinal cord


subdivision of the nervous system that brings information to the cns

autonomic nerves

serves the internal organs of the body

nerve impulse

message that travels from the dendrites of a neuron to the axon


long nerve fiber that conducts away from the cell body of the neuron


the branching extensions of a neuron that receives messages and conducts impulses toward the cell body

schwann cell

large nucleated cells that form myelin around the axons of neurons

node of ranvier

small gap between myelinated segments where axonal membrane is exposed; increase speed of impulses


the space between two neurons through which neurotransmiters travel


recieves information about changes in the enviroment (stimuli)


muscles or glands that respond to impulses


something that causes a response

cell body

contains major concentration of the cytoplasm and the nucleus of the neuron


an electrically-insulating phospholipid (fat) layer that surrounds the axons of many neurons


A relatively simple, involuntary response to a stimulus.

resting potential

the potential difference between the two sides of the membrane of a nerve cell when the cell is not conducting an impulse

action potential

change in electrical potential that occurs between the inside and outside of a nerve or muscle fiber when it is stimulated

refractory period

the time after a neuron fires during which a stimulus will not evoke a response

saltatory conduction

transmission of an impulse by jumping


a chemical messenger that travels across the synapse from one neuron to the next and influences whether a neuron will generate an action potential(impulse)

spinal cord

part of central nervous system, links brain to rest of body


responsible for balance and coordination, routine movement


the largest part of the brain, controls thinking, reasoning, and memory

corpus callosum

connects the hemispheres; found deep inside cerebrum; allows hemispheres to share information


relay link between brain and spinal cord

medulla oblongata

Regulates ♥ heart rhythm, blood flow, breathing rate,etc.


natural neurotransmitters linked to pain control


Tough, white outer layer of the eye

autonomic nervous system

The part of the nervous system that controls involuntary action and responses.

Parkinson's Disease

a progressive disease that destroys brain cells and is identified by muscular tremors, slowing of movement, and partial facial paralysis

Alzheimer's Disease

a disease that results in the progressive loss of an individual's memory and mental capacity.


"Lou Gherig's Disease" - progressive neurological disease in which the motor neurons degenerate to the point of total loss of motor function. The intelligence, memory, and personality is unaffected.

Multiple Sclerosis

disorder in which myelin is destroyed causing loss of motor activity

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 above 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