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MHIS1513 > Session 17 - Nervous Tissue > Flashcards

Session 17 - Nervous Tissue Flashcards

1
Q

What is the perikaryon of a neuron?

A

The cell body

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2
Q

What is the cell body of neuron called?

A

Perikaryon

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3
Q

What are Nissl-bodies?

A

Granulations created by accumulation of organelles

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4
Q

What is the axon hillock?

A

The part where the axon begins from the cell body. It is characterised by a lack of Nissl-bodies

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5
Q

What is the axolemma?

A

The cell membrane of a neuron

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6
Q

What are the 3 classifications of neurons?

A
  1. Multipolar
  2. Bipolar
  3. Pseudo-unipolar
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7
Q

What are multipolar neurons?

A

Neurons that have a single axon and multiple dendrites extending from the perikaryon

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8
Q

Give 2 examples of where multipolar neurons can be found?

A
  1. Spinal cord
  2. Sympathetic ganglion
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9
Q

What are bipolar neurons?

A

Neurons that have only two processes from the perikaryon, an axon and a dendrite

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10
Q

Give 3 examples of where bipolar neurons can be found?

A
  1. Vestibulococchlear ganglion
  2. Retina
  3. Olfactory mucosae
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11
Q

What are pseudo-unipolar neurons?

A

Neurons that have a single process extending from the perikaryon which then splits into an axon and a dendrite

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12
Q

Give examples of where pseudo-unipolar neurons are found?

A
  1. Spinal ganglion
  2. Most of the cranial ganglia
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13
Q

What is another name for motor neuron?

A

Efferent neuron

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14
Q

What is another name for sensory neuron?

A

Afferent neuron

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15
Q

What are the 3 types of synapses?

A
  1. Axodendritic
  2. Axosomatic
  3. Axoaxonic
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16
Q

Name the 5 types of neuroglia found in the CNS.

A
  1. Oligodendrocytes
  2. Fibrous Astrocytes
  3. Protoplasmic astrocytes
  4. Ependymal
  5. Microglia
17
Q

Name the 2 types of neuroglia found in the PNS.

A
  1. Schwann cells
  2. Satellite cells
18
Q

Where are Oligodendrocytes found?

A

The white matter of the CNS

19
Q

What is the function of Oligodendrocytes?

A

They are responsible for the production of the myelin sheath of the CNS

20
Q

Where are fibrous astrocytes found?

A

White matter

21
Q

Where are protoplasmic astrocytes found?

A

Grey matter

22
Q

What is the function of astrocytes?

A
  1. Give structural and metabolic support to neurons
  2. Participate in repair process in nervous tissue
  3. Participate in the formation of the blood-brain barrier
  4. Cover the bare areas of neurons
  5. Forms glia limitans
23
Q

Where are Microglia found?

A

White and grey matter

24
Q

What is the function of Microglia?

A

They are phagocytic cells

25
Q

Where are Ependymal cells found?

A
  1. Canalis centralis of spinal cord
  2. Brain ventricles
26
Q

What is the function of Ependymal cells?

A

They produce, circulate and absorb cerebrospinal fluid

27
Q

What is the function of Schwann cells?

A

They produce the myelin sheath of the PNS

MHIS1513 (13 decks)

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