Chapter 17: PNS

Question 1

How many pairs of spinal nerves?

Answer 1

31

Question 2

How many pairs of cranial nerves?

Answer 2

12

Question 3

Sensory information travels into the spinal cord along the ____ ____

Answer 3

posterior root

Question 4

Motor information travels out of the spinal cord along the _____ _____

Answer 4

anterior root

Question 5

What consists of somatic motor neurons?

Answer 5

anterior horn

Question 6

What consists of autonomic motor neurons?

Answer 6

lateral horn

Question 7

What consists of interneurons and sensory axons?

Answer 7

posterior horn

Question 8

Cervical plexus

Answer 8

C1-C4

Question 9

Brachial plexus

Answer 9

C5-T1

Question 10

Nerve branches of cervical plexus

Answer 10

phrenic & axillary nerves

Question 11

Nerve branches of brachial plexus

Answer 11

median, radial, ulnar nerves

Question 12

Lumbar plexus

Answer 12

L1-L4

Question 13

Nerve branches of lumbar plexus

Answer 13

femoral, saphenous, obturator nerves

Question 14

Sacral plexus

Answer 14

L4-S4

Question 15

Nerve branches of sacral plexus

Answer 15

tibial and common fibular nerve

Question 16

Olfactory I function

Answer 16

sensory- smell

Question 17

Optic II function

Answer 17

sensory- vision

Question 18

Oculomotor III function

Answer 18

motor- moves eye muscles
autonomic- allows pupils to constrict/makes lens rounded

Question 19

Trochlear IV function

Answer 19

motor- moves superior oblique eye muscle

Question 20

Trigeminal V function

Answer 20

sensory- general sensory from face
motor- moves muscles to chew

Question 21

Abducens VI function

Answer 21

motor- moves lateral rectus eye muscle

Question 22

Facial VII

Answer 22

sensory- taste from part of tongue
motor- moves muscles of facial expression
autonomic- increases secretion in glands

Question 23

Vestibulocochlear VIII function

Answer 23

sensory- hearing

Question 24

Glossopharyngeal IX function

Answer 24

sensory- taste from part of tongue
motor- one pharyngeal muscle
autonomic- increases secretion from parotid gland

Question 25

Vagus X function

Answer 25

sensory- visceral from internal organs and general sensory from ears and throat
motor- most pharyngeal muscles
autonomic- innervates smooth muscle and glands of abdominal organs

Question 26

Accessory XI function

Answer 26

motor- trapezius and sternocleidomastoid muscle

Question 27

Hypoglossal XII

Answer 27

motor- intrinsic and extrinsic tongue muscles