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Anaphys 3 > Nervous Tissue > Flashcards

Nervous Tissue Flashcards

1
Q

What is the purpose of nervous tissue?

A

conduction of nerve impulses to relay information

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2
Q

What germ layer is nervous tissue derived from?

A

ectoderm

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3
Q

What is nervous tissue made of?

A

neurons and neuroglia

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4
Q

What is the cell body of a neuron called?

A

perikaryon or soma

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5
Q

Which type of neuron is most common?

A

multipolar

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6
Q

How are neurons classified?

A

according to the number of dendrites (polarity)

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7
Q

What is the ratio of neuroglia to neurons?

A

10:1

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8
Q

What are the four types of neuroglial cells?

A

oligodendrocytes, astrocytes, ependymal cells, microglial cells

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9
Q

What forms the myelin in the CNS?

A

oligodendrocytes

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10
Q

What is the purpose of myelin?

A

insulates the axon, and facilitates transmission of electrical signals

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11
Q

What cell is star-shaped and forms the BLOOD BRAIN BARRIER?

A

astrocytes

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12
Q

What cell lacks tight junctions, and forms the cuboidal epithelium of the CNS and the CSF?

A

ependymal cells

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13
Q

What cell is phagocytic and is the brain’s “garbage collector”?

A

microglial cells

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14
Q

In the brain, what type of matter is on the periphery?

A

grey matter

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15
Q

What makes up white matter?

A

myelinated AXONS and myelin-producing oligodendrocytes

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16
Q

What makes up the granular layer of grey matter?

A

LOTS OF small neurons and Purkinje cells

17
Q

What makes up the peripheral nervous system?

A

nerves, ganglia, nerve endings

18
Q

What is a collection of neuron cell bodies?

A

ganglia

19
Q

What is an Auerbach’s plexus?

A

when a ganglia is between 2 smooth muscle layers

20
Q

In the PNS, what makes myelin?

A

Schwann cells

21
Q

Which neuroglial cell has a role in immune defense and can be phagocytic?

A

microglia

22
Q

In the PNS, what are the collections of cell bodies?

A

ganglia

23
Q

When a ganglia is between two muscle layers, what is it called?

A

Auerbach’s plexus

Anaphys 3 (7 decks)

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