The Nervous System

Question 1

What is the CNS composer of?

Answer 1

The Brain and Spinal Cord

Question 2

What makes up the Peripheral nervous system?

Answer 2

All the nerve tissue not in the CNS
Spinal nerves
Cranial nerves
Autonomic nerves

Question 3

What do dendrites do?

Answer 3

They increase the cell body area. They receive information from other neurons and bring them to the body for processing.

Question 4

What is the Axon/Nerve Fibre?

Answer 4

Longest process from the body. Electrical wire that carries action potential from one Neurone to the next.

Question 5

What are bundles of axons called?

Answer 5

Nerve (PNS)

Tract (CNS)

Question 6

What is the myelin sheath?

Answer 6

It is an electrical insulator covering bundles of axons.

Question 7

What does the brain consist of?

Answer 7

Gyri (folds) and Sulci (grooves)

Question 8

What are the 4 lives of each cerebral hemisphere?

Answer 8

Occipital, Parietal, Temporal and Frontal Lobe

Question 9

What is Cranial Nerve I?

Answer 9

The olfactory nerve.

Question 10

What is Cranial Nerve II?

Answer 10

The optic nerve.

Question 11

What is Cranial Nerve III?

Answer 11

Oculomotor Nerve.

Question 12

What is Cranial Nerve IV?

Answer 12

Trochlear Nerve

Question 13

What is Cranial Nerve V?

Answer 13

The Trigeminal Nerve

Question 14

What is Cranial Nerve VI?

Answer 14

Abducent Nerve

Question 15

What is Cranial Nerve VII?

Answer 15

Facial Nerve

Question 16

What is Cranial Nerve VIII?

Answer 16

Vestibulocochlear nerve

Question 17

What is Cranial Nerve IX?

Answer 17

Glossopharyngeal nerve

Question 18

What is Cranial Nerve X?

Answer 18

Vagus Nerve

Question 19

What is Cranial Nerve XI?

Answer 19

Spinal Accessory Nerve

Question 20

What is Cranial Nerve XII?

Answer 20

Hypoglossal Nerve

Question 21

How are spinal nerves named?

Answer 21

According to the vertebrae below

Question 22

Where do the spinal cords come out to reach the body?

Answer 22

Intervertebral foraminae

Question 23

Where does the spinal cord pass through when leaving the brain?

Answer 23

Foramen Magnum

Question 24

What are the 4 segments of the spinal cord?

Answer 24

Cervical
Thoracic
Lumbar
Sacral/Coccygeal

Question 25

How many pairs of spinal nerves are there?

Answer 25

31

Question 26

At which vertebral level does the spinal cord end?

Answer 26

L1/L2

Question 27

What is the name of the end of the spinal cord?

Answer 27

Conus Medullaris

Question 28

What is the extension of the lumbar and sacral nerve roots of the spinal cord called?

Answer 28

Cauda Equina

Question 29

What do the spinal nerves supply?

Answer 29

The body wall

Question 30

Where are the spinal nerves located?

Answer 30

Only within the Intervertebral Foraminae.

Question 31

What do the spinal nerves connect with?

Answer 31

Structures of the Soma (via rami) | The spinal cord (via roots and rootlets)

Question 32

What is a Dermatome?

Answer 32

Strip of skin supplied by both the anterior and posterior rami of the spinal nerves.

Question 33

Where is the male nipple located?

Answer 33

T4 Dermatome

Question 34

Where is the umbilicus located?

Answer 34

T10 Dermatome

Question 35

What are plexuses?

Answer 35

Networks of intertwined anterior rami.

Question 36

What does the cervical plexus supply?

Answer 36

Posterior scalp Neck wall Diaphragm

Question 37

What does the brachial plexus supply?

Answer 37

The upper limb

Question 38

What does the lumbar plexus supply?

Answer 38

The lower limb

Question 39

What does the Sacral | Plexus supply?

Answer 39

The lower limb Gluteal region Perineum

Question 40

In the brachial plexus, what are the 5 names nerves which supply the upper limb?

Answer 40

``` Axillary Median Musculocutaneous Radial Ulnar ```

Question 41

Where do the sympathetic nerves exit the spinal cord?

Answer 41

T1-L2 spinal nerves

Question 42

What is the outflow of the parasympathetic axons?

Answer 42

Craniosacral

Question 43

What nervous system deals with the external environment?

Answer 43

Somatic nervous system

Question 44

What does the autonomic nervous system do?

Answer 44

Deals with the internal environment

Question 45

Where is the autonomic nervous system located?

Answer 45

Internal organs within body cavities and body wall organs

Question 46

What is Motor (efferent)?

Answer 46

Action potential towards the body wall, body cavity or organ

Question 47

What is Sensory (afferent)?

Answer 47

Action potentials towards the brain

Question 48

What is a nerve?

Answer 48

Bundles of axons (nerve fibres) wrapped in connective tissue