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Tissues BDS1 > Introduction to Nervous Tissue > Flashcards

Introduction to Nervous Tissue Flashcards

1
Q

what is the function of nervous tissue?

A

carries information throughout the body via electrical impulses

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2
Q

what forms the CNS

A

brain and spinal cord

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3
Q

what forms the PNS

A

cranial nerves and spinal nerves

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4
Q

what is the function of the nervous system

A

provide rapid and precise communication between different parts of the body via the action of neurons

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5
Q

where do nerve cells come from?

A

neurons

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6
Q

where do support cells come from?

A

glial cells

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7
Q

what do nerve cells do?

A

send signals around the body

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8
Q

what do glial cells do?

A

protect, provide nutrients and immune functions to the neurons

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9
Q

what is a neuron specialised for?

A

intercellular communication

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10
Q

what is the structure of the neurons

A

dendrites, large cell body, single axon, terminal boutons

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11
Q

comment on dendrites

A

highly branched processes extending from cell body. form synapses with adjacent neurons. respond to external stimuli. convey incoming information to cell body

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12
Q

comment on the cell body

A

contains usual cellular organelles - large nucleus, nissl bodies, numerous mitochondria, no centrioles

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13
Q

comment on the axon

A

rapidly propagates signal from cell body towards axon terminals. specialised to conduct action potentials. PNS - myelinated or non-myelinated. CNS - myelinated

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14
Q

what does the neuroglia do?

A

protect and support neurons

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15
Q

are ependymal cells part of the CNS or PNS?

A

CNS

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16
Q

are astrocytes part of the CNS or PNS?

A

CNS

17
Q

are microglia part of the CNS or PNS?

A

CNS

18
Q

are oligodendrocytes part of the CNS or PNS?

A

CNS

19
Q

are satellite cells part of the CNS or PNS?

A

PNS

20
Q

are schwann cells part of the CNS or PNS?

A

PNS

21
Q

what do ependymal cells do?

A

line fluid-filled cavities in brain (ventricles) and spinal canal

22
Q

what do astrocytes do?

A

form the blood brain barrier and regulate the chemical environment

23
Q

what do microglia do?

A

remove invading microbes and dead cells from CNS

24
Q

what do oligodendrocytes do?

A

form myelin sheaths around ll CNS axons and provide structural and metabolic support

25
Q

what do schwann cells do?

A

form myelin sheaths around PNS axons and provide structural and metabolic support

26
Q

what do satellite cells do?

A

provide structural and functional protection

Tissues BDS1 (10 decks)

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