Exam 3 Chapter 14

Question 1

List 2 examples of general somatic sensations

Answer 1

• touch
• pain

Question 2

List 1 example of a special visceral sensation.

Answer 2

taste and smell

Question 3

Do all nerves contain both sensory and motor fibers?

Answer 3

all spinal nerves have both sensory and motor
- some cranial nerves are exclusively sensory or primarily motor

Question 4

Name the functional type of the sensory receptors that respond to painful stimuli. What is the structure of these receptors?

Answer 4

Nociceptors are free nerve endings

Question 5

Are proprioceptors part of the somatic or visceral sensory system?

Answer 5

somatic sensory system

Question 6

What type of stimulus do encapsulated receptors respond to?

Answer 6

pressure, discriminative touch, vibration, stretch

Question 7

Which nerve is the great sensory nerve of the face?

Answer 7

trigeminal nerve (V)

Question 8

Which nerve innervates the muscles of facial expression?

Answer 8

facial nerve (VII)

Question 9

What deficits would result of a lesion that damaged the dorsal root of spinal nerve T4?

Answer 9

sensory deficits from the muscles and skin of the anterior and posterior trunk of T4 and rib 4

Question 10

What deficits would occur if a lesion damaged the dorsal ramus of T4?

Answer 10

sensory and motor deficits in the skin and intrinsic back muscles in T4

Question 11

What vertebra does the cervical nerve C5 exit from?

Answer 11

below C4

Question 12

What vertebra does lumbar nerve L3 exit from?

Answer 12

below L3

Question 13

Would a patient with a spinal injury at C5 be able to breathe independently?

Answer 13

Yes

Question 14

What do baroreceptors monitor?

Answer 14

blood pressure

Question 15

What is the large, onion-shaped pressure receptor in deep connective tissue called?

Answer 15

lamellar corpuscles

Question 16

What receptor type is for pain, itch, and temperature receptors?

Answer 16

free nerve ending

Question 17

What receptor type contains intrafusal fibers and flower spray endings?

Answer 17

muscle spindles

Question 18

What receptor type has discriminative touch receptors in hairless skin?

Answer 18

tendon organs

Question 19

What receptor type contains nerve endings wrapped around thick collagen bundles in a tendon?

Answer 19

tendon organs

Question 20

What receptor type rapidly adapts deep-pressure mechanoreceptors?

Answer 20

lamellar corpuscles

Question 21

What receptor type slowly adapts deep-pressure mechanoreceptors?

Answer 21

bulbous corpuscles

Question 22

What cranial nerve innervates 4 extrinsic eye muscles?

Answer 22

oculomotor

Question 23

What cranial nerve is the major sensory nerve of the face?

Answer 23

trigeminal

Question 24

What cranial nerve innervates the sternocleidomastoid and trapezius?

Answer 24

accessory

Question 25

What 3 cranial nerves are primarily or exclusively sensory?

Answer 25

olfactory, optic, vestibulocochlear

Question 26

What cranial nerve innervates the tongue muscles?

Answer 26

hypoglossal

Question 27

What cranial nerve allows chewing of food?

Answer 27

trigeminal

Question 28

What cranial nerve is anesthetized during dental work?

Answer 28

trigeminal

Question 29

What cranial nerve helps to regulate heart activity?

Answer 29

vagus

Question 30

What cranial nerve is sensory innervation for hearing and equilibrium?

Answer 30

vestibulocochlear

Question 31

What 4 cranial nerves contain parasympathetic motor fibers?

Answer 31

facial, glossopharyngeal, oculomotor, vagus

Question 32

What cranial nerve innervates muscles of facial expression?

Answer 32

facial

Question 33

What contains only motor fibers?

Answer 33

ventral root

Question 34

What muscles are innervated by the musculocutaneous nerve?

Answer 34

coracobrachialis, biceps brachii, brachialis

Question 35

Bronchial refers to the airways in the lungs. What does brachial refer to?

Answer 35

arm

Question 36

Which muscles are innervated by the femoral nerve?

Answer 36

sartorius, iliacus, quadriceps femoris

Question 37

What occurs in all of the mixed cranial nerves V, VII, IX, and X?

Answer 37

general somatic sensory and somatic motor to pharyngeal arch muscles

Question 38

Sensory receptors are called encapsulated nerve endings. What is the capsule made of?

Answer 38

Connective tissue

Question 39

Describe the roots to and the composition of a spinal nerve.

Answer 39

Roots come from spinal cord - sensory and motor fibers - dorsal (sensory) and ventral (motor) root - merge to form mixed spinal nerve

Question 40

Are dorsal and ventral roots in the CNS or the PNS?

Answer 40

PNS

Question 41

Name the branches of a spinal nerve (besides the rami communicantes) and identify what basic region of the body each branch supplies.

Answer 41

Dorsal ramus: supplies deep muscles and skin of the posterior trunk Ventral ramus: supplies anterior and lateral trunk and limbs

Question 42

Name the nerve plexuses that serve the anterior thigh.

Answer 42

lumbar plexus

Question 43

Name the nerve plexuses that serve the diaphragm.

Answer 43

phrenic nerve

Question 44

Name the nerve plexuses that serve the perineum.

Answer 44

pudendal nerve

Question 45

Name the nerve plexuses that serve the forearm.

Answer 45

brachial plexus - median nerve - ulnar nerve - radial nerve

Question 46

Name the nerve plexuses that serve the ankle.

Answer 46

lumbosacral plexus