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Flashcards in nerve Deck (19):
1

functions

communicaton
-intercellular electrical
-extracellular electrical

2

structure

arranged in networks

3

t/f - more glia than neurons

true

4

neuron general structure

dendrites = afferent = input
axon (microtubules, neurofillaments, trunk)= output = efferent
cell bodies in nervous tissue
soma = body
cytoplasm = perikaryon
-NISSL substance = RER

5

axon

nerve fibre (nerve)
microtubules make up its skeleton
many mitochondria bc it's metabolically active
gets rid of material through vesicular transport (myelinated)

6

nerve fibre structure

support of cells = insulation (PNS = schwann cells, CNS = oligodendrocytes

7

myelinated fiber structure

one axon, many schwann cells
intervals w nodes of ranvier

8

how does info travel over a myelinated fibre?

saltatory conduction = progressive jumping depolarization

9

myelinated fibers

one axon, many schwann cells
node of ranvier indicates no mitochondria

10

dendrites

extensive branching

11

synapse

presynaptic neuron = efferent,

12

how many end plates will a motor unit have

hella

13

other cells associated?

microglia, astrocytes, oligodendrocytes,
ependyma = epi lining of CNS

14

ependyma = ?

lining of CNS
no basement membrane
cilia, microvili

15

PNS parts

endoneurium
perineurium
epineurium

16

peripheral nerve

bundles of nerve fibers
protected by connective tissue (dense irregular)

17

ganglia

aggregates of neural bodies outside CNS
axons/dendrites will still attached to CNS
satellite cells will help

18

satellite cells

neuronal support, and metablic smorkers

19

sensory nerve endings

kin, taste buds