chapter 8&9 Memmler's
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Divisions of Nervous System | CNS, PNS
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| The CNS contains what | brain and spinal cord
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| The PNS contains what | cranial nerves and spinal nerves
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| the PNS is subdivided into | Somatic and Autonomic nervous systems
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| Nervous system | maintenance of homeostasis through stimuli
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| Somatic Nervous System SNS | voluntary; Effectors: Skeletal Muscles
Regulates muscle
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| Autonomic Nervous System ANS | Involuntary; Effectors: Smooth muscle, Cardiac muscle, and glands (organs) "Visceral Nervous System" Regulates organs, heart, glands
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| Subdivisions of ANS | Parasympathetic and sympathetic
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| Sympathetic | enables response to stress "fight or flight" Emergency situation Adregenic
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| parasympathetic | steady pace, "rest & digest" Functions most time cholinergic
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| neuron | basic unit, function cell
has a cell body. Nucelous
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| dendrites | fiber, carried towards cell
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| axon | fiber, carried away from cell
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| myelin | fatty material insulates and protects "white matter"
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| PNS cells | Schwann cells
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| Schwann cells | produce myelin
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| node | speeds up conduction of impulses; gap
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| neurelimmma | outermost covering aids in repair of PNS
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| White matter vs. Gray matter | white matter- myelinated
gray matter- non-myelineated, all neuron bodies
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| 3 function of neuron | sensory, motor, and internerons
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| Sensory | Afferent, conduct impulses toward CNS
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| motor | Efferent, conduct impulses away from CNS and glands, Exit
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| interneurons | central, relay info from within CNS
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| Nerve | bundle of fibers in PNS
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| Tract | bundle of fibers in CNS
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| mixed nerves | PNS, most cranial, all spinal, both motor and sensory
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| neuroglia | type of cell, "helper cell". connective tissue
protects and nourishes nervous tissue, supports and binds to other sturctures, aid in repair of cells, acts as phagocytes to remove pathogens and impurities, regulate compostion of fluids
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| impulse | stimulus, nerve impulse, membrane impulse
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| synapse | point of junction between axon and dendrite
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| Neurotransmitters | parasympathetic- ACH
sympathetic- adrenaline, nonadrenaline
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| polarized/ polarization | at rest, waiting
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| depolarized/ depolarization | responding
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| repolarized/ repolarizatoin | recovering
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