PNS

Question 1

PNS function

Answer 1

carries information to and from the CNS

Question 2

afferent nerves

Answer 2

travelling to the CNS

Question 3

efferent nerves

Answer 3

travelling from the CNS

Question 4

autonomic neurones have __ outside the spinal cord

Answer 4

ganglia

Question 5

ganglia

Answer 5

collections of cell bodies, where axons synapse

Question 6

how many neurones does it take for the autonomic nervous system to reach its target

Answer 6

two (pre and post ganglionic)

Question 7

autonomic neurones arise from the __

Answer 7

brain and the spinal cord

Question 8

where are sympathetic cell bodies present

Answer 8

thoracic and lumbar spinal cord segments

Question 9

thoracic and lumbar spinal cord segments connect to __

Answer 9

paravertebral ganglion chain, the sympathetic chain, or to individual ganglia

Question 10

how are parasympathetic ganglia different to sympathetic

Answer 10

they aren’t grouped in a chain, instead they are found near the target organ

Question 11

where do parasympathetic neurones arise

Answer 11

cranial nerves / limbo-sacral spinal cord

Question 12

somatic nervous system is responsible for

Answer 12

conscious control of the body

Question 13

role of somatic sensory nerves (afferent)

Answer 13

detect pain, temperature, touch and proprioception

Question 14

role of somatic efferent nerves

Answer 14

motor to effector skeletal muscles

Question 15

order of transmission

Answer 15

brain (Precentral gyrus), spinal cord (Corticospinal tract), axon, neuromuscular junction

Question 16

nerves can be either __ or __

Answer 16

spinal, cranial

Question 17

spinal nerves

Answer 17

carry axons of neurones (somatic and autonomic) to and from the spinal cord

Question 18

where do spinal nerves leave the spinal cord (except the cervical region)

Answer 18

below each vertebrae

Question 19

which vertebrae has a cervical nerve above and below

Answer 19

C7

Question 20

each spinal nerve has a __ and a __

Answer 20

dorsal root and a ventral root

Question 21

dorsal root

Answer 21

afferent/sesnsory

Question 22

ventral root

Answer 22

efferent/motor

Question 23

plexus

Answer 23

network of vessels/nerves

Question 24

when do nerves begin to blend into other never (plexus)

Answer 24

after leaving the spinal cord

Question 25

lumbar plexus

Answer 25

vertebrae T12-L5

Question 26

dermatome

Answer 26

area of skin

Question 27

myotome

Answer 27

group of muscles

Question 28

Each spinal nerve supplies and is supplied by __

Answer 28

a dermatome / myotome

Question 29

how is distribution of a spinal nerve different to distribution of a peripheral nerve

Answer 29

peripheral nerve can have more than one dermatome

Question 30

sciatic nerve muscles

Answer 30

motor to muscles of posterior thigh

Question 31

sciatic nerve motor

Answer 31

sensory afferent from the skin over the lateral side of leg

Question 32

femoral nevre muscles

Answer 32

motor to muscles of anterior thigh

Question 33

femoral nerve motor

Answer 33

sensory afferent from anterior thigh and medial leg

Question 34

what do cranial nerves supply

Answer 34

special senses e.g. taste