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Essay One
The Nervous System
16
Psychology
Undergraduate 1
10/16/2006

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Cards

Term
the four neurotransimtters
Definition
seratonin
ephinephrin
dopamine
acetylcholine
Term
neuron
Definition
basic building block of the nervous system
Term
how fast do neurons fire?
Definition
2 to 250 mph
Term
how do neurons fire?
Definition
the lock and key method
Term
absolute refractory period
Definition
time when a neuron will not fire
Term
relative refractory period
Definition
neuron will fire as quickly as it possibly can
Term
What does same stand for?
Definition
sensory afferent motor efferent
Term
sensory afferent
Definition
feeling, sending the signal to the brain
Term
motor efferent
Definition
moving, signal to move away, react
Term
myelin
Definition
insulation for neurons
Term
nodes of Rainvier
Definition
spaces on a neuron missing myelin; help neurons communicate faster
Term
what does the central nervous system ecompass?
Definition
the brain and spinal column
Term
what does the peripheral nervous system do?
Definition
it sends signal to the central nervous system
Term
What are the two parts of the autonomic (unconcious) branch of the periphial nervous system?
Definition
sympathetic and parasympathetic
Term
What does the somatic branch involve?
Definition
conciously made decisions
Term
What's the difference between the somatic and the autonomic branches of the nervous system?
Definition
autonomic: unconscious processes
somatic: conscious decisions
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