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

Sign up for an account

Already have a Quizlet account? .

Create an account


basic unit of structure and function in the nervous system; conducts impulses throughout the nervous system; 3 regions include a cell body, dendrites, axon.


branchlike extensions of the neuron that receive impulses and carry them toward the cell body.


an extension of the neuron that carries impulses away from the cell body and toward other neurons, muscles, or glands.


the small space between a neuron's axon and another neuron's dendrites.


chemicals released from an axon that diffuse across a synapse to the next neuron's dendrites to initiate a new impulse.

Central Nervous System

coordinates all the body's activities.

Peripheral Nervous System

division of the nervous system made up of all the nerves that carry messages to and from the central nervous system.


largest part of the brain, composed of two hemispheres connected by bundles of nerves; controls conscious activities, intelligence, memory, language, skeletal muscle movements, and the senses.


rear portion of the brain; controls balance, posture, and coordination.

Medulla Oblongata

part of the brain stem that controls involuntary activities such as breathing and heart rate.

Somatic Nervous System

portion of the nervous system composed of cranial nerves, spinal nerves, and all of their branches; voluntary pathway that relays information mainly between the skin, the CNS, and skeletal muscles.


an automatic response to a stimulus.

Autonomic Nervous System

carries impulses from the CNS to internal organs.

Sympathetic Nervous System

controls many internal functions during times of stress.

Parasympathetic Nervous System

controls many of the body's internal functions when it is at rest; in control when body is relaxed.

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