Flashcard Set Preview
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| 1 |
- Contains cell bodies
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Grey matter
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| 2 |
- Motor
- ...
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Ventral
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| 3 |
Sensory
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Dorsal
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| 4 |
- Stretch receptors
- ...
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2a afferent motoneuron
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| 5 |
- Groups of cell bodies for a given muscle...
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Ventral horn
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| 6 |
- Dendritic tree is very ______
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Extensive
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| 7 |
- Sites for excitatory and inhibitory...
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Dendrites
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| 8 |
3 G’s
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- GABA
- ...
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| 9 |
- Inhibitory
- ...
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GABA, glycine
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| 10 |
- Excitatory
- ...
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Glutamate
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| 11 |
Cytoskeletal Proteins (5)
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- dystrohpin
- ...
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| 12 |
Cytoskeletal protein functions (3)
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1. strengthen cell and serve as anchor for nucleus
2. ...
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| 13 |
- predominantly structural
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Actin
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| 14 |
- involved in all 3 cytoskeletal protein...
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tubulin and neurofilament proteins
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| 15 |
- 1 ball
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Actin monomer
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| 16 |
- Alpha helix of actin monomers
- ...
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Actin filament
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| 17 |
- 2 forms
o Alpha
o ...
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Tubulin
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| 18 |
- Forms a heterodimer
- ...
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Tubulin
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| 19 |
- Made up of specialized proteins
o ...
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Neurofilaments
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| 20 |
- Blocks axoplasmic transport by depolymerization...
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Colchicine
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| 21 |
- Stabilizes the actin filaments
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Phalloidin
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| 22 |
- Stabilizes microtubules
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Taxol
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| 23 |
- Depolyermize actin
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Cytochalasins
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| 24 |
- Induce formation of tubulin crystals...
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Vinblastine and vincristine
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| 25 |
- Similar to skeletal muscle connective...
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Nerve connective tissue
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| 26 |
- Around each axon
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Endoneurium
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| 27 |
- Around fascicule
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Perineurium
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| 28 |
- Surrounds nerve trunk
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Epineurium
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| 29 |
- Big axon (mostly motor) =
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Myelinated
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| 30 |
- Small axon (mostly sensory) =
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Non-myelinated
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| 31 |
- Between fassicles
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Blood vessels
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| 32 |
- Round
- ...
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Artery
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| 33 |
- Oval
- ...
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Vein
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| 34 |
With injury and regeneration (3)
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- Schwann cells are smaller
- ...
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| 35 |
- Increases speed of AP conduction
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Myelination
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| 36 |
- 50-120 m/sec
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Motoneurons
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| 37 |
- As big as 1 mm
- ...
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Schwann cell
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| 38 |
- Possible exchange of substances: ATP,...
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Schwann cell
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| 39 |
- All motor axons have ________
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Myelin sheaths
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| 40 |
- Membrane of axon
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Neurolemma
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| 41 |
- Layers of the Schwann cell
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Schwann cell fingers
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| 42 |
- Gel like extracellular substance between...
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Gap substance
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| 43 |
- Around whole Schwann cell and around...
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BM
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| 44 |
- Motoneurons per muscle
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< 100 - > 2000
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| 45 |
- Fibers per motor unit
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< 10 - > 2000
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| 46 |
Structure of motoneuron (8)
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- Soma
- ...
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| 47 |
Function of cytoskeletal proteins (3)
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1. Strength
2. Growth
3. ...
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| 48 |
- Actin in _______
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Motoneurons
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| 49 |
Connective tissue in nerves (3)
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- Endoneurium
- ...
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