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18 Cards in this Set
- Front
- Back
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Neuron
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indvidual nerve cell; carries and processes information
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Soma
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sends messesges of its own down the thin fiber (nerve impulses)
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Dendrite
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neuron fibers that recieve the messesges
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Axon
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carries info away from cell body
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Axon Terminal
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allows the info to pass through its fibers
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Synapse
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microscopic space between two neurons over which messages pass
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Receptor Site
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sensitive to other neurotransmitters or hormones
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Myelin
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fatty layer that coat some axons
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Neurontransmitters
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chemicals realeased by neurons
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Nerves
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bundle of neuron axons
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Central Nervous System
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consist of the brain and spinal cord;
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CNS; Brain
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center of the nervous system; thought and emotion
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CNS; Spinal Cord
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connects the brain to the rest of the body
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Peripheral Nervous System
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connects lims to organs
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PNS; Somatic Nervous system
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controls voluntary activities
ex: walking, smiling |
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PNS; Autonomic Nervous System
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-invouluntary activieties
-heart rate, digestion *dont have to think about it |
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Sympathethic
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-branches off of autononmic n.s
-fight of flight response -what happens when the body is under stress |
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Parasympathetic
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-during rest and digest
-slowing things down, relaxing |
