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Body Logistics > Nervous System > Flashcards

Nervous System Flashcards

1
Q

What are the three types of neurone?

A

Sensory
Relay/process
Motor

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2
Q

What are the two components of the CNS?

A

Brain and spinal cord

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3
Q

What is the periphery nervous system split into?

A

Somatic and autonomic

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4
Q

What are the three major components of the brain?

A

Cerebral hemispheres
Brain stem- regulates cardiovascular and breathing and sleep
Cerebellum- motor control

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5
Q

What is emerging from the spinal cord?

A

30 pairs of nerves

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6
Q

What do nerves carry?

A

Sensory and motor information

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7
Q

What is a ganglion?

A

Contains nerve cell bodies, linked by synapses

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8
Q

What are collections of cell bodies in the CNS called

A

Nuclei

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9
Q

What are traps?

A

Bundles of nerve fibres

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10
Q

What does folding of the cerebral cortex mean?

A

Increased surface area so more cell bodies and nerves can fit

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11
Q

What is grey matter and white matter?

A

White matter- outside of spinal cord made of axons

Grey matter- inside of spinal cord is composed of neurones

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12
Q

What happens in the grey matter of spinal cord?

A

Information processing

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13
Q

What occurs in the white matter of the spinal cord?

A

Dissemination of information

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14
Q

What does the ventral route contain?

A

Motor axons only

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15
Q

What does the dorsal route contain?

A

Sensory axons only

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16
Q

What is the dorsal and ventral horn?

A

Associated with dorsal and ventral routes

17
Q

How do sensory neurones communicate?

A

Receptor sends information into a sensory neurone which leads to the dorsal horn of the spinal cord

18
Q

Why is a sudounopolar neurone able to travel faster?

A

Cell body is only connected by one process so bypasses and travels much more quickly

19
Q

What is a motor neurone?

A

Sends axon through ventral route towards muscle

20
Q

What are dendrites for?

A

Receive and integrate information so cell can make a decision

21
Q

Do motor neurones have a high metabolic demand?

A

Yes

22
Q

What are interneurones?

A

Found solely in the central nervous system
Connect sensory with motor neurones
Responsible for processing

23
Q

If you cut a cross section though the spinal nerve what do you see?

A

Not homogenous
All nerves are compartmentalised
In bundles

24
Q

What are fascicles?

A

Bundles of axons

25
Q

What is a perineurium?

A

Connective tissue surrounding a fascicle

26
Q

How many Schwann cells are per axon in the PNS?

A

1:1

27
Q

What does a Schwann cell produce?

A

Myelin

28
Q

What do myelinated Schwann cells do?

A

Insulate

29
Q

What cells are in the CNS?

A

Oligodensdrisite

30
Q

How many axons do oligodendrocites myelinate?

A

100s

31
Q

What is an astrocyte?

A

Shaped like stars
Create blood brain barrier
Cellular vacuum cleaners

32
Q

What are microglia?

A

Look for things that may cause damage to the brain, become activated, like macrophages

Body Logistics (20 decks)

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