The Nervous System

Question 1

What is a mixed nerve fibre

Answer 1

Such as inter coastal nerve
Phrenic nerve
Vagus nerve
Carry two or more functional types of nerve fibre to any given region of the body or structure

Question 2

What are the 6 functions a nerve axon can be

Answer 2

Somatic sensory function 
Somatic motor
Special sensory 
Visceral afferent 
Sympathetic 
Parasymp

Question 3

What is the cns and pNS

Answer 3

Cns - brain and spinal cord

PNS - nerves out with cns , cranial nerves and spinal nerves, symp chains

Question 4

What are cranial nerves

Answer 4

12 pairs
Connect with brain
Vagus nerve is example

Question 5

What are spinal nerves

Answer 5

31 pairs
Connect with spinal cord
Named branches such as phrenic nerve etc

Question 6

What do spinal nerves supply

Answer 6

The soma body wall

Such as the neck wall, chest wall, diaphragm, abdominal wall, pelvic Walls and the limbs

Question 7

What is the dermatome map

Answer 7

Segmental arrangement of spinal nerves supply to body wall

Question 8

What are some der ate landmarks

Answer 8

T4 - nipples

T10 - umbilicus

Question 9

What are some functions of the nervous system

Answer 9

Allow us to sense our environment and make effective repsonse
Sensory and motor
Protective keep us safe internally and externally

Question 10

Which nervous systems control the internal and external systems

Answer 10

Somatic - external

Autonomic - internal

Question 11

What dos the somatic system Suzy

Answer 11

The soma body wall

Question 12

Where are the somatic nervous system fibres found

Answer 12

Found in spinal nerves branches such as intercostal nerves and phrenic nerves

Question 13

What does somatic sensory fibres do

Answer 13

Supply from skin, parietal pleura, skeletal muscles, bones and joints

Question 14

What does somatic motor nerve fibres do

Answer 14

Supply to skeletal striated muscle including diaphragm

Question 15

What is somatic nervous system in terms of being voluntary

Answer 15

Voluntary not including reflexes

Question 16

What does somatic snensory neurones sense

Answer 16

Touch
Pain
Temperature
Joint position

Question 17

How to somatic motor neurones respond

Answer 17

Skeletal started voluntary muscle move the skeleton appropriately

Question 18

What is the autonomic nervous system in terms of being voluntary

Answer 18

It is involuntary

Question 19

What are some examples of the autonomic nervous system actions

Answer 19

Internal enviro
Heart rate 
Blood pressure
Digestion 
Glandular sec

Question 20

What are the two parts of e autonomic nervous system

Answer 20

Sympathetic - fight or flight

Parasympathetic - rest and digest

Question 21

What can happen from symp Ns stim

Answer 21

Heart - rate increases
Arterioles - dilate to skeletal muscle and constrict to skin leading to pale and coldness
Skin - makes hair stand on end and produces sweat
Lungs - dilates bronchioles
Gut - reduces motility
Pupils - dilate
Liver - release glucose

Question 22

What does the parasymp system do

Answer 22

Supply same organs as symp except skin and arterioles

Opposes symp

Question 23

What are the branches called that come off of the symp trunk

Answer 23

Splanchinic nerves

Question 24

What are the functions of the spinal nerves - intercostal

Answer 24

Somatic motor
Sensory
Symp to skin and arterioles

Question 25

What are the functions of the vagus nerve

Answer 25

Somatic motor
Somatic sensory
Parasymp
Cranial nerve 10

Question 26

What are two neurotransmitters involved in the symp syst

Answer 26

Noradrenaline - at all organs

Acetylcholine - all para vertebral ganglia

Question 27

What does a neurone consists of

Answer 27

A ganglion
Dendrites
Myelin sheath
Axon - nerve fibre