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Neuro > Neurocytology > Flashcards

Neurocytology Flashcards

1
Q

Active elements of the NS

A

Neurons

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2
Q

Supportive elements of the NS

A

Glia

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3
Q

These NS cells communicate with each other and the body

A

Neurons

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4
Q

Which cells make up 90% of the brain?

A

Glia

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5
Q

Most neurons that send signals away from the CNS

A

Multipolar

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6
Q

Neurons found in special sensory systems (vision, smell, hearing)

A

Bipolar

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7
Q

Neurons that send signals from the skin to the CNS

A

Unipolar

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8
Q

Neurons that act as a go between for other neurons

A

Interneuron

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9
Q

Axons of multiple neurons that travel together

A

Nerves

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10
Q

Most nerves are:
A: Motor
B: Sensory
C: Mixed

A

Mixed

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11
Q

Type of NS that senses and responds to the outside world

A

Somatic NS

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12
Q

Type of NS that senses and responds to the inside world

A

Autonomic NS

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13
Q

Types of glial cells

A
  • Astrocytes
  • Oligodendrocytes
  • Microglia
  • Ependymal cells
  • Radial glial cells
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14
Q

What are astrocytes the interface between?

A
  • Neurons
    and
  • Pia
  • Ependyma
  • Blood vessels
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15
Q

What do astrocytes provide?

A

Structural support

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16
Q

What do astrocytes take up?

A

Neurotransmitters

17
Q

What do astrocytes regulate?

A

Ionic balance

18
Q

What type of response do astrocytes have?

19
Q

Pathologically, what do astrocytes form after CNS injury?

20
Q

This type of astrocyte is found in white matter

21
Q

This type of astrocyte is found in gray matter

A

Protoplasmic

22
Q

Where are protoplasmic astrocytes found?

A

Synaptic junctions

23
Q

What do protoplasmic astrocytes do?

A

Maintains synapses

24
Q

Where are fibrous astrocytes found?

A

Along axons

25
Q

What do protoplasmic astrocytes do?

A

Forms axonal borders

26
Q

Where are oligodendrocytes?

27
Q

What do oligodendrocytes do?

A

CNS axon myelination

28
Q

These cells form myelin in the PNS

A

Schwann cells

29
Q

Are unmyelinated axons surrounded by oligodendrocytes?

A

Of course not

30
Q

Forms many internodes on different axons

A

Oligodendrocyte

31
Q

Forms one internode on one axon

A

Schwann cell

32
Q

Are unmyelinated axons surrounded by Schwann cells?

33
Q

CT surrounding the whole nerve in the PNS

34
Q

CT surrounding individual fascicle

35
Q

CT surrounding individual axon

36
Q

What is endoneurium an extension of?

A

Schwann cells

37
Q

Where are satellite cells found?

A

Dorsal root ganglia

38
Q

Do oligodendrocytes form myelin?

39
Q

Satellite cell function

A

Protects sensory neuron cell bodies in the DRG

Neuro (3 decks)

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