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Flashcards in Nervous System Deck (32)
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1

What are the three types of neurone?

Sensory
Relay/process
Motor

2

What are the two components of the CNS?

Brain and spinal cord

3

What is the periphery nervous system split into?

Somatic and autonomic

4

What are the three major components of the brain?

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

5

What is emerging from the spinal cord?

30 pairs of nerves

6

What do nerves carry?

Sensory and motor information

7

What is a ganglion?

Contains nerve cell bodies, linked by synapses

8

What are collections of cell bodies in the CNS called

Nuclei

9

What are traps?

Bundles of nerve fibres

10

What does folding of the cerebral cortex mean?

Increased surface area so more cell bodies and nerves can fit

11

What is grey matter and white matter?

White matter- outside of spinal cord made of axons
Grey matter- inside of spinal cord is composed of neurones

12

What happens in the grey matter of spinal cord?

Information processing

13

What occurs in the white matter of the spinal cord?

Dissemination of information

14

What does the ventral route contain?

Motor axons only

15

What does the dorsal route contain?

Sensory axons only

16

What is the dorsal and ventral horn?

Associated with dorsal and ventral routes

17

How do sensory neurones communicate?

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

18

Why is a sudounopolar neurone able to travel faster?

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

19

What is a motor neurone?

Sends axon through ventral route towards muscle

20

What are dendrites for?

Receive and integrate information so cell can make a decision

21

Do motor neurones have a high metabolic demand?

Yes

22

What are interneurones?

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

23

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

Not homogenous
All nerves are compartmentalised
In bundles

24

What are fascicles?

Bundles of axons

25

What is a perineurium?

Connective tissue surrounding a fascicle

26

How many Schwann cells are per axon in the PNS?

1:1

27

What does a Schwann cell produce?

Myelin

28

What do myelinated Schwann cells do?

Insulate

29

What cells are in the CNS?

Oligodensdrisite

30

How many axons do oligodendrocites myelinate?

100s