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Nervous System
Division Nervous System
8
Anatomy
11th Grade
09/08/2009
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Term
Central Nervous System (CNS)
 Definition
Located in the brain and spinal cord enclosed by meninges
Term
PEripheral Nervous System (PNS)
 Definition
Nerves outside the above; more vulnerable to injury
Term
Afferen NS
 Definition
transmission of messages is toward the CNS toward the breain...*SENSORY*
Term
Efferen NS
 Definition
transmission away from the brain, away from CNS...*MOTOR*
Term
Somatic Nervous System
 Definition
effector is a skeletal muscle and therefor is volunta
Term
Automonic Nervous System
 Definition
effector is a gland, cardiac and smooth muscle...involuntary..@ subdivisions are sympathetic and parasmpathetic.
Term
Gray MAtter
 Definition
darker areas of the cell nuclei where most processing of info takes place
Term
White maTTER
 Definition
pathways tjat are insulated with myelin(fatty tissue secreted by specdial glia) and where signals are transmitted
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