nerve

Question 1

functions

Answer 1

communicaton

• intercellular electrical
• extracellular electrical

Question 2

structure

Answer 2

arranged in networks

Question 3

t/f - more glia than neurons

Answer 3

true

Question 4

neuron general structure

Answer 4

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

Question 5

axon

Answer 5

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

Question 6

nerve fibre structure

Answer 6

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

Question 7

myelinated fiber structure

Answer 7

one axon, many schwann cells

intervals w nodes of ranvier

Question 8

how does info travel over a myelinated fibre?

Answer 8

saltatory conduction = progressive jumping depolarization

Question 9

myelinated fibers

Answer 9

one axon, many schwann cells

node of ranvier indicates no mitochondria

Question 10

dendrites

Answer 10

extensive branching

Question 11

synapse

Answer 11

presynaptic neuron = efferent,

Question 12

how many end plates will a motor unit have

Answer 12

hella

Question 13

other cells associated?

Answer 13

microglia, astrocytes, oligodendrocytes,

ependyma = epi lining of CNS

Question 14

ependyma = ?

Answer 14

lining of CNS
no basement membrane
cilia, microvili

Question 15

PNS parts

Answer 15

endoneurium
perineurium
epineurium

Question 16

peripheral nerve

Answer 16

bundles of nerve fibers

protected by connective tissue (dense irregular)

Question 17

ganglia

Answer 17

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

Question 18

satellite cells

Answer 18

neuronal support, and metablic smorkers

Question 19

sensory nerve endings

Answer 19

kin, taste buds