The Nervous System

Question 1

These fibers release acetylcholine at the presynaptic cleft/synapse

Answer 1

cholinergic fibers

Question 2

The cervical plexus

Answer 2

innervates neck and posterior portion of head
C1 to C4
motor impulses to diaphragm

Question 3

the enzyme that rapidly destroys acetylcholine after impulse has been transmitted

Answer 3

acetylcholinesterase

Question 4

The brachial plexus

Answer 4

C5 to T11
nerves: axillary, radial, median, musculocutaneous, ulnar

Question 5

cells that create myelin sheath in the peripheral nervous system

Answer 5

Schwann cells

Question 6

axillary nerve

Answer 6

supplies deltoid and teres minor
arm abduction and lateral rotation

Question 7

structures of the diencephalon

Answer 7

thalamus
subthalamus
epithalamus
hypothalamus

Question 8

radial nerve

Answer 8

supplies muscles that extend elbow, wrist, fingers, and thumbs

Question 9

median nerve

Answer 9

supplies pronator muscles of forearm, flex wrist, fingers, and thumb

Question 10

The Limbic system

Answer 10

parts of cerebum and diencephalon

emotions, motivation, mood, pain and pleasure

Question 11

musculocutaneous nerve

Answer 11

flex shoulder and elbow
sensation to lateral surface of forearm

Question 12

ulnar nerve

Answer 12

flex wrist and fingers
abduct and adduct fingers and thumbs
sensation in areas of hand

Question 13

layers of the meninges

Answer 13

dura mater (outer)
arachnoid
pia mater (inner)

Question 14

Lumbosacral plexus

Answer 14

Lumbar = L1 to L4
Sacral = L4 to S4
supply lower extremity: obturator, femoral, tibial, common peroneal

Question 15

obturator nerve

Answer 15

adduct thigh, rotate laterally
sensation to upper medial side of thigh

Question 16

femoral nerve

Answer 16

flex hip and extend knee
sensation to thigh, medial leg, and ankle

Question 17

tibial nerve

Answer 17

extend hip, flex knee
plantar flex ankle, flex toes
sensation to sole of foot

Question 18

common peroneal nerve

Answer 18

short head of biceps femoris muscle

Question 19

sciatic nerve

Answer 19

combo of common peroneal and tibial nerves
largest peripheral nerve in the body

Question 20

how many pairs of cranial nerves are there?

Answer 20

12!
all but two pairs (olfactory and optic nerves) exit from brainstem

Question 21

cranial nerves carrying only sensory fibers

Answer 21

I, II, VIII
1, 2, 8

Question 22

cranial nerves carrying only motor fibers

Answer 22

III, IV, VI, XI, XII
3, 4, 6, 11, 12

Question 23

cranial nerves carrying both motor and sensory fibers

Answer 23

V, VII, IX, X
5, 7, 9, 10

Question 24

cranial nerve I

Answer 24

olfactory
sense of smell

Question 25

cranial nerve II

Answer 25

optic
sense of vision

Question 26

cranial nerve III

Answer 26

oculomotor
motion of eyeball and upper lid

Question 27

cranial nerve IV

Answer 27

trochlear
eyeball (downward gaze)

Question 28

cranial nerve V

Answer 28

trigeminal
sensation of forehead, scalp, face, etc
motion of mastication

Question 29

cranial nerve VI

Answer 29

abducens
lateral movement of eyeball

Question 30

cranial nerve VII

Answer 30

facial
motor activity for facial expression
sense of taste

Question 31

cranial nerve VIII

Answer 31

vestibulocochlear
sense of hearing and balance

Question 32

cranial nerve IX

Answer 32

glossopharyngeal
motor fibers to pharyngeal muscles
sensation to back of tongue, parotid glands

Question 33

cranial nerve X

Answer 33

vagus nerve
motor function to soft palate, pharynx, larynx (voice)
sensory to pharynx, larynx, etc.

Question 34

cranial nerve XI

Answer 34

accessory nerve
motor innervation to muscles of soft palate and pharynx
swallowing, speech

Question 35

cranial nerve XII

Answer 35

hypoglossal nerve
muscles of tongue and throat