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27 Cards in this Set
- Front
- Back
1. General funx of NS
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1. respond to changes in environment
2.Controls/integraet functional activities |
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Divisions of NS
1. anatomical 2. Functional |
1. CNS,PNS
2. Somatic,Autonomic |
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1. Subidivisions of ANS
2. Funx |
1. Para,Symp, Enteric
2. Fight/flight, Rest/digest |
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1. 2 types of cells in NS
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1. Neurons
2. Supporting cells(shcwan,glia,enteric glial cells |
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Neurons
1.funx 2.arrangement 3.Do they divide 4.Derived from |
1. receive/conduct impuls
2. integrated network, chain likefashion 3. NO, (neural stems generate new one) 4. Neral crest (pns), Neural tube(cns) |
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Supporting cells
1. Relationship to neurons 2. CNS 3. PNS 4. ENTERIC 5. Function |
1. very close
2. gia 3. Schwaan/satelite 4. Enteric glial cells 5. phys support,elec insulation, exchange pathways |
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Axon
1. Size compared: what about internerouns 2. Orignitaes 3. Site of AP generation 4. Where are axon proteins synthesized |
1. Largest, Inter=short
2. axon hillock 3. Initial segment (b/w apex of AxHlliock and beginning of myelin sheath 4. Periaxoplamic proteins |
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Dendrites vs axon
1. #'s processes 2. Size 3. Diameter 4.Myelination 5. organelles |
1. many
2. shorter 3. greater diameter 4. UNMYELIATED 5. NO GOLGI |
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Classificatio of neurons based on processes
1. 1 Ax 2 or more dend 2. 1 AX ! dendrite 3. 1 process diveds 2 |
1. Multipolar
2. Bipolar 3. Pseudounipolar |
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Two types of multipolar neurons
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1. Golgi Type I: past denditic tree
2. Type II: terminates in area or doesn't extend |
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What is the most abundant neuron fond in Nervous system
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Multipolar
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Where are pseudounipolar neurons located
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DRG, and Cranial nerve ganlia
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What are the 3 categories of nerves based on function
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Sensory, Motor, Interneurons
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Pain,temperature,pressure,touch of body surfaces are carred by what
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somatic afferent fibers
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Convey impulses to skeletal muscles
2. Involuntary impulses to smooth muscle, glands, pekinje fibers |
Somatic efferent
2. Visceral efferent |
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Axon transport
1. what direction 2. Anterograde 3. REtrograde |
1. Bidirectional
2. to Periphery (+) Kinesin 3. To body (-) cytoplasmic dynein |
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Rate of transport
1. Slow 2. Fast Whats carried |
Slow = Antero, stuctural elements, cytoplasmic proteins
Fast: Antero= mebrain limited org/lowMW materials Retro= same as fast and enoctosed material |
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What type of transort is utilized by toxins and viruses
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FAST RETROGRADE to travel to cell body, Uses ANTEROGRADE to travel to perhipheral nerves
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Synapses
1. where are they located 2. Only see with what stain 3. |
b/w pre/post synapse
2. Silver precipitatio staining methods |
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1. 3 morphological classes of synapes
2. 2 classes based on conduction |
1. axodendritic
2. axoaxonic 3. axosomatic 1. Chemical (NTS) 2. Electrical: gap junx No NTs (most innervert, smo/card |
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What are the components of chemical synapse
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1. presynaptic knob (boutoun terminal)
2. Synaptic cleft 3. Post knob |
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Whats located in synaptic knob
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1. synaptic vessicles w/ NTS
2. Mito and dense layer= presynaptic desnity of membrane |
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Whats located in Postsynaptic knob
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1. REceptor sites for NTs
2. Desne material (postsynaptic density) on PM |
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Schwann cells
1. develop from 2. |
1. neural crest cellsand mitosis of parent schwann cell
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What are the 4 type of CNS supporting cells (glial)
which one produces/maintain myelin in CNS |
1. Oligodendy
2.Astrocytes (largest 3.microglia (smallest) 4. epindymal 1. Oligodendrocytes |
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Where are microglia derived from
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Mesenchyme, thus contain vimentin IFs
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1.What are the motor neurons of brain
2. Innervates 3. how many neurons |
1. Somatic efferent
2. skeletal muscle 3. single neuron |