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15 Cards in this Set
- Front
- Back
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Nerves are designated how?
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cranial nerves or spinal nerves
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Where are the cell body and dendrites of neurons?
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CNS or ganglia
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What are ganglia?
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collection of nerve bodies outside the cns
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What are nerves composed of?
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axons, the longest part of neurons
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What does the dorsal root of a spinal nerve contain?
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sensory fibers that conduct impulses inward
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Which direction would the ventral root direct nerve impulses?
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outward
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What are automatic responses to stimulus called?
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reflexes
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What is synonymous with sympathetic division?
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sympathetic/thoracolumbar/fight or flight
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the neurotransmitter released by postganglionic axon is what? What does this do?
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norepinephrine, similar to the stimulant epinephrine (adrenaline), usually increaases heart rate and contractility
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What does the parasympathetic division synonymous with?
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craniosacral portion
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what fiber is long and what fiber is short in the parasympathetic division? Why?
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preganglionic fiber is long, and postganglionic fiber is short because the ganglia lie within the organ
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What is a way to image changes in brain activity?
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positron emission tomography
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What is associated with a PET scan?
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radioactive glucose-->emits positrons-->goes to areas that are metabolically active (cause that's where glucose goes to) REVEALS FUNCTION, colored--aerobic respiration in areas needed
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What is a recurrent disorder of cerebral funciton characterized by sudden, brief attacks of altered consciousness, motor activity, or other phenomoenon?
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epilepsy
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how would Andy epilepsy be described?
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uncontrolled reverberating waves of action potential often associated with seizure
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