Central Nervous System
Processes, interprets, and stores information; issues orders to muscles, glands, and organs
Carry messages to spinal cord
Carry orders from CNS to body
Little antennas that receive messages from nervous system
Ends of axons resembling branches
Fatty insulation that may surround the axon of a neuron
Site where nerve impulse is transmitted from one nerve cell to another
Electrical current or impulse
Special molecules in membrane
Substance secreted by organs called glands, that affect functioning of other organs
Somatic Nervous System
Controls skeletal muscles
Sympathetic Nervous System
Mobilizes body for action, energy input
Parasympathetic N. S.
Conserves energy, maintain quiet state
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