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12 Cards in this Set

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Central Nervous System

Network of nerves that inclides the brain and spinal cord; integrates and precesses information sent by nerves.


Peripheral Nervous System

Network of nerves that carry sensory messages to the central nervous system (CNS) and send information from the CNS to the muscles and glands; consists of the autonomic and somatic system.


Sensory Neuron

Carry information into the CNS

What do they carry?

Motor Neuron

Carry information to the effectors.

What do they carry?

Interneurons or Association Neurons

Make connections in the CNS; only found in the CNS; are very short.



The functional unit of the nervous system.

Neuroglial Cells

These cells are arranged into the nerve tissue and nerves throughout the body interconnect all parts of the body.

Cell Body

The part of the neuron that contains the cells organelles. Most cellular funtions occur here.

Part of the neuron


Gather information and send a nerve impulse towards the cell body.


Send a nerve impulse away from the cell body towards other neurons or effectors.

Myelin Sheath

Protects and insulates the axon.

Plastic coating on electric wire.

Node of Ranvier

Gap in the myelin sheath insulating the axon of a myrlinated nerve cell; the membrane of the axon is exposed and action potentials occur only at these nodes; nerve inpulses jump from one node of Ranvier to the next.