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parts of the CNS(Central Nervous System) |
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-Brain -Spinal Cord -Protection |
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-meninges-3 layers of tissues -cerebrospinal fluid |
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-dendrites -cell body-central -axon |
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sensory neuron interneuron motor neuron |
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has myelin sheath covers axons |
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no myelin sheath dendrites, cell bodies |
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Peripheral Nervous System(PNS) |
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connects CNS to extremities via nerves |
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-don't have to think about -CNS to cardiac muscle, smooth muscles, and glands |
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sympathetic (fight or flight) parasympathetic (calms things down) |
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five parts of reflex action |
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receptor sensory neuron interneuron motor neuron effector |
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higher mental functioning |
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left hemisphere of the brain |
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3Rs (controls right side of the body) |
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artistic (controls left side of the body) |
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both hemispheres communicate with each other through a mass of nerve fibers |
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-outer region of the brain -deeply grooved or convoluted |
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frontal parietal occipital temporal |
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-associated with motor control -personality, judgement, and self control |
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coordinates muscle activity |
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-breathing, heartbeat, blood pressure -part of brain stem |
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-links cerebrum and cerebellum -helps breathing, eye movements, facial expressions -part of brain stem |
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coordinates movements of both eyes |
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"master switch" of the cerebrum "tune out"-every 20 minutes "high alert" |
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-thalamus-switchboard -hypothalamus-controls unit for body's automatic systems |
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a person's action can be completely explained as responses to particular stimuli |
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nutrition rest-REM (rapid eye movement) dream while sleeping |
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-depressant -poison-acetaldehyde -neuritis-inflammation of the nerves -addiction-one out of every ten causes delirium -causes accidents and crime |
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paralysis spinal cord and nerves brain |
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spinal cord and nerves injury |
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whiplash sciatica average age-19 |
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-stroke-most common serious injury of nervous system -concussion -amnesia -coma-prolonged unconscious state |
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-blood-brain barrier (not a disease) -meningitis -multiple sclerosis-self immune disease (diet helps) -poliomyelitis -tetanus -parkinson's-keep mind active, diet -dementia -alzheimer's -epilepsy-too much information at once -cerebral palsy |
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-pain receptors -mechanoreceptors-touch and pressure -thermoreceptors-temperatures other than normal body temperature |
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-taste-taste buds -smells-receptors to olfactory nerve |
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-cochlea-hardest bone in the body -semicircular canals-helps us maintain our balance -we have 2 muscles for a reflex arch to prevent damage to the ear |
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