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Histology > Nervous Tissue > Flashcards

Nervous Tissue Flashcards

1
Q

nerve cells

A

conducting cells specialized to conduct electrical activity that can be sensory, motor, interneurons

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2
Q

What is the function of the neuroglia cells ?

A

nonconducting cells providing physical support, metabolic activity, insulation

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3
Q

What type of nervous tissue cells can become cancerous

A

neuroglial cells

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4
Q

Where does the nerve tissue develop from

A

embryonic ectoderm

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5
Q

The pseudounipolar cells are

A

sensory found in spinal and most cranial sensory gangia

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6
Q

the bipolar cells are

A

sensory and found in retina, cochlear, and vestibular ganglia

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7
Q

Multipolar clles are

A

motor and interneurons and found in MOST cells

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8
Q

giemsa stain

A

a nissle stain showing some of the 6 cortical layers

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9
Q

What are the layers of cortical cells

A 
molecular
external granular layer
external pyramidal cell layer
internal granular layer
ganglionic layer
multiform cell layer
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10
Q

nissle bodies

A

RER and ribosomes, high level of metabolism

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11
Q

axon hillock

A

origin of the axon from the perikaryon, free of cell organelles

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12
Q

schwann cells

A

provide myelin for PNS

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13
Q

satellite cells

A

surround neuron cell bodies of spinal ganglia

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14
Q

oligodendroglia

A

provide myelin found in CNS

white matter in CNS

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15
Q

astrocytes

A

most numerous of glial cells
contain GFAP
fibrous type in white matter, protoplasmic found in grey matter

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16
Q

microglia

A

smallest, phagocytic cells, derived from bone marrow

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17
Q

where are glial cells except microglial derived from

A

neural tube

18
Q

ependyma

A

line the ventricles and central cord

19
Q

Function of myelin sheath

A

electrically isolates the axon from the surroundings

composed of multiple layers of cell membrane around the axon

20
Q

junction between segments devoid of myelin

A

node of ranvier

21
Q

inernodal segment

A

myelin between two ranvier nodes

22
Q

what is the function of the ranvier node

A

allows fast conduction (saltatory cnduction of nerve impulse)

23
Q

inner and outer lamellae of myelin sheat contains_________-

A

cytoplasm

24
Q

small islands of the membrane that contain cytoplasm are called

A

schmidt laterman clefts

25
Q

Function of satellite cells

A

electrical and metabolic insulation

26
Q

dorsal root ganglion contains

A

cell bodies of psuedounipolar sensory innervation

27
Q

_______oligodendrocytes can myelinate several axons simultaneousl

A

single

28
Q

difference between schwann cells and oligodendrocytes

A

don’t have external lamina and fewer schmidt laterman clefts

29
Q

Where are the nodes of ranvier larger

A

CNS

30
Q

protoplasmic astrocyte

A

mainly in the gray matter, short branching processes

31
Q

fibrous astrocyte

A

mainly in the white matter-longer straight processes

32
Q

Ependymal cells

A

form the simple epithelial lining of CSF filled cavities of CNS, tight junctional complexes, cuboid or columnar, microvilli or cilia
cover the choroid plexus (formation of CSF)

33
Q

anterograde transport

A

molecules synthesized in soma

can be slow or fast

34
Q

retrograde transport

A

brings regulatory proteins from the bouton to the soma
only fast rate
mediated by dynein bound microtubules

35
Q

axodendritic

A

classical synapse

36
Q

axosomatic

A

axon to cell body

37
Q

axoaxonic

A

axon to axon

38
Q

dendrodendritic

A

dendrite to dendrite

39
Q

electrical synapses

A

mechanism of synaptic transmission

40
Q

endoneurium

A

circular and longitudinal collagen fibrils around each nerve fiber
probably secreted by schwann cells

41
Q

perineurium

A

specialized connective tissue (contractile cells)

tight junctions between the cells in the same layer-BBB

42
Q

epineurium

A

dense irregular connective tissue surrounds the nerve and the fascicles
contains blood vessels

Histology (8 decks)

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