The Peripheral Nervous System

Question 1

What does the Peripheral NS consist of?

Answer 1

The nerves of the body which connect to the CNS

Question 2

What do nerves do?

Answer 2

Carry impulses away from and towards the CNS

Question 3

What sections does the PNS divide into?

Answer 3

Cranial nerves
Spinal nerves
Ganglia

Question 4

How many pairs of spinal nerves are in the Sensory-somatic NS?

Answer 4

31

Question 5

How many pairs of cranial nerves are in the Senosry-somatic NS?

Answer 5

12

Question 6

What is the sensory-somatic NS made up of?

Answer 6

Made up of cranial and spinal nerves, containing both sensory and motor neurons

Question 7

What do sensory neurons do?

Answer 7

Transmit sensory info from the skin, skeletal muscle and sensory organs to the CNS

Question 8

What types can peripheral nerves be divided into?

Answer 8

Sensory, motor and mixed

Question 9

Where are cranial nerves located?

Answer 9

Nerves that originate in the base of the brain and leave through holes in the skull

Question 10

Where are the spinal nerves located?

Answer 10

They leave the spinal cord through the intervertebral foramina (spaces between the vertebra)

Question 11

What type of impulse do sensory nerves convey and where to?

Answer 11

Afferent impulses from sensory organs to the brain

Question 12

What type of impulse do motor nerve fibres convey and where to?

Answer 12

Efferent impulses from the brain to effector organs (Skeletal/smooth muscle and glands)

Question 13

Afferent meaning?

Answer 13

Away from the organs (sensory input) to CNS

Question 14

Efferent meaning?

Answer 14

Effect- from CNS towards muscles or glands (motor output) (causing an effect)

Question 15

What is involved in the motor system?

Answer 15

Involves voluntary and involuntary; to and from skeletal muscles

Question 16

What is involved in the autonomic NS?

Answer 16

Involuntary actions only; smooth and cardiac muscle, some glands also

Question 17

What is involved in the sensory system?

Answer 17

Afferent sensory impulses -travel away from sensory organs and towards the brain

Question 18

What is involved in the parasympathetic division?

Answer 18

Known as ‘rest and digest’, when body is resting/eating, it slows HR/RR and increases digestion (conserves energy)

Question 19

What three divisions does the autonomic NS divide into?

Answer 19

Parasympathetic, sympathetic, enteric

Question 20

What is involved in the sympathetic division?

Answer 20

Known as ‘fight or flight’, rapid involuntary response to danger/stress, hormones boost the body’s alertness/HR

Question 21

What does the enteric division include?

Answer 21

The muscles and glands of the digestive system (GI tract), consists of a system of neurones that governs the function of the gastrointestinal tract

Question 22

What are plexuses?

Answer 22

A plexus is where all the nerves of any one spinal nerve group join together where nearly leaving the spinal cord

Question 23

Which spinal nerve region does not group to form a plexus?

Answer 23

The Thoracic nerves

Question 24

What are the 6 spinal nerve groups in order (top to bottom)?

Answer 24

Cranial Brachial Thoracic Lumbar Sacral Coccygeal

Question 25

Anagram for 6 spinal nerve groups?

Answer 25

Curved Backs Tear Like School Chairs

Question 26

What is a dermatome?

Answer 26

An area of skin supplied by one single nerve

Question 27

What is a dermatome map?

Answer 27

Can highlight which area of the body a nerve/nerves are not working

Question 28

What is the autonomic NS?

Answer 28

The system controlling automatic and involuntary functions of the body

Question 29

What does the autonomic NS divide into?

Answer 29

The sympathetic NS and the parasympathetic NS

Question 30

What is the sympathetic NS known as?

Answer 30

Fight or flight

Question 31

What is the parasympathetic NS known as?

Answer 31

Rest and digest

Question 32

What is the adrenal medulla?

Answer 32

Inner part of the adrenal gland, controls initiation of fight of flight hormones (nor)adrenaline