Spinal Cord And Peripheral Nervous System

Question 0

What is efferent

Answer 0

Moter division that transmits info from CNS to the rest of the body

Question 1

Components of CNS and PNS

Answer 1

CNS- brain and spinal cord

PNS- spinal nerve 31 and cranial 12

Question 2

What is afferent

Answer 2

Sensory division

Transmits info from periphery to brain

Question 3

Difference between somatic and visceral sensory

Answer 3

Somatic receives info from skin skeletal muscles and special senses
Visceral receives info from visceral

Question 4

Difference between somatic and autonomic motor

Answer 4

Somatic is voluntary ( skeletal)

Autonomic is involuntary ( cardiac and smooth muscles, glands)

Question 5

Cell type in nervousness system

Answer 5

Neuroglia
Schwann cells
Neurons

Question 6

Neuroglia ( glial cells) do what

Answer 6

Cells support, insulates and nourishes the neurons

Non-excitable cells

Question 7

Schwann cells are in PNS and oligondendrocytes in CNS produce

Answer 7

Myelin protein for myelinated axons

Encase 10 unmyelinated axons

Question 8

Neurons purpose

Answer 8

Structural and functional unit of the nervous system and rapid communication

Question 9

Components of neuron

Answer 9

Cell body (soma and perikarya)
Dendrites ( carry impulse to the neurons cell body)
Axons ( carry neurons away from neurons cell body)
Axons can be myelinated or unmyelinated

Question 10

What is myelin

Answer 10

Layers do lipid protein
Form sheaths around axon
Increase velocity of the impulse

Question 11

In synapse what neurotransmitters

Answer 11

Acetylcholine
Norepinephrine
Dopamine
GABA

Question 12

PNS has ganglion which is

Answer 12

Collection of nerve cell bodies outside of CNS

Question 13

Where does the spine end

Answer 13

L1-L2

Question 14

Primary function of spinal cord

Answer 14

Transmit signals to and from the brain to peripheral structures

Question 15

Why does the cervical have large amount of white matter

Answer 15

Bc everything must go through the cervical

Question 16

Why does the lumbar have large amounts of gray matter

Answer 16

Bc of lower limbs

Question 17

There are how many meninges

Answer 17

Dura mater
Arachnoid mater
Pia mater

Question 18

What is the purpose do filum terminale

Answer 18

Anchors sac

Question 19

Arachnoid mater characteristics

Answer 19

Middle layer
Delicate and avascular
Encloses cerebrospinal fluid filled subarachnoid space between IPA and arachnoid

Question 20

CSF characteristics

Answer 20

Cushion for cord

Low in protein and cellular content

Question 21

Pia mater characteristics

Answer 21

Innermost layer
Directly covers spinal nerve roots and blood vessels
Continues as filum terminale

Question 22

Denticulate ligament role

Answer 22

Separate anterior and dorsal nerve root

Question 23

How many spinal nerves

Answer 23

31 pairs
8-cervical above vertebrae 
12-thoracic below vertebrae
5-lumbar 
5-sacral
1-coccygeal

Question 24

Where do dorsal and ventral roots run

Answer 24

SubArachnoid space

Question 25

Three connective tissue in peripheral nerves

Answer 25

Epineurium-enclosed bundle of fascicles
Perineurium- encloses a fascicles
Endoneurium- surrounds neurolemma cells

Question 26

Brachial plexus characteristics

Answer 26

Formed by 4 cervical and 1st thoracic nerve

Innervates the upper extremities

Question 27

Lumbosacral plexus characteristics

Answer 27

Formed by the lumbar and sacral nerve
L1-s5
Innervates lower limbs

Question 28

What is formed at L1-L2

Answer 28

Conus medullaris which then lead to cauda equina

Question 29

What is your lumbar cistern

Answer 29

Enlargement of subarachnoid to accommodate cauda equina