chapter 13

Question 1

mechanoreceptors

Answer 1

pressure

Question 2

thermoreceptors

Answer 2

temperature

Question 3

photoreceptors

Answer 3

light

Question 4

proprioceptors

Answer 4

position sensing, stretch

Question 5

chemoreceptors

Answer 5

chemicals in solution

Question 6

nociceptors

Answer 6

pain

Question 7

nerves

Answer 7

bundles of axons in PNS

Question 8

tracts

Answer 8

bundles of axons in CNS

Question 9

mixed nerves

Answer 9

contains axons of motor and sensory neurons

Question 10

olfactory l

Answer 10

sensory- smell

Question 11

optic ll

Answer 11

sensory- vision

Question 12

oculomotor lll

Answer 12

primarily motor- move eyeball, constrict pupil, adjust lense

Question 13

trochlear lV

Answer 13

primarily motor- move eyeball

sensory- proprioceptors

Question 14

trigeminal V

Answer 14

Mixed NErve
sensory- skin/muscle around the eyes, nose, mouth, cheek, tounge
Motor- chewing muscles

Question 15

Abducens Vl

Answer 15

motor- moves the eyeball

sensory- proprioception

Question 16

Facial Vll

Answer 16

Mixed Nerve
motor- facial expression & glans (tear,saliva)
sensory- proprioception and taste

Question 17

Vestibulocochlear Vlll

Answer 17

Primarily sensory- hearing and balance

motor- adjust hair cells

Question 18

Glossopharyngeal lX

Answer 18

Mixed nerve
sensory- taste and tongue sensation
motor- swallowing, speech, salivating

Question 19

vagus X

Answer 19

Mixed Nerve
Sensory- sensations of the thorax and abdominal organs, pharynx, epiglottis
motor- swallowing, coughing, speech, contraction of GI tract, slowing HR

Question 20

Accessory Xl

Answer 20

Primarily motor- swallowing, moving head and shoulders

sensory- proprioception

Question 21

Hypoglossal Xll

Answer 21

primarily motor- speech, swallowing

sensory- proprioception

Question 22

spinal nerves (how many are there)

Answer 22

8 cervical
12 thoracic
5 lumbar
5 sacral
1 coccyx

Question 23

dermatome

Answer 23

an area of the skin the sensory nerve fiber of a particular spinal nerve innervates

Question 24

cervical plexus

Answer 24

C1- C4

innervates the skin and muscles of the neck, head, and superior shoulders and chest

Question 25

nerves on the cervical plexus

Answer 25

phrenic nerve | innervates diaphragm

Question 26

brachial plexus

Answer 26

C5-C8, T1 | innervates the skin and muscles of the shoulders, superior thorax and upper limbs

Question 27

nerves on brachial plexus

Answer 27

``` axillary musculocutaneous median radial ulnar ```

Question 28

ulnar nerve

Answer 28

innervates hand flexors and medial hand

Question 29

median nerve

Answer 29

innervates forearm flexors and skin of anterior hand

Question 30

radial nerve

Answer 30

innervates the tricep muscle and forearm extensors and skin of posterior hand

Question 31

musculocutaneous nerve

Answer 31

innervates biceps, brachialis, and skin of anterior lateral forearm

Question 32

axillary nerve

Answer 32

innervates deltoid muscle and shoulder skin

Question 33

Lumbar plexus

Answer 33

L1-L4 | innervates the skin and muscles of the anterolateral abdomen, external genitals, and part of lower limbbs

Question 34

nerves of lumbar plexus

Answer 34

femoral- thigh flexors and leg extensors | saphenous- extends length of leg from femoral to arch of foot to hallux

Question 35

sacral plexus

Answer 35

L4-L5, S1-S4 | innervates skin and muscles of buttock and lower limbs

Question 36

nerves on sacral plexus

Answer 36

sciatic nerve | forms tibial and fibular branches to innervate the thigh, leg, and foot

Question 37

reflex activity

Answer 37

rapid, predicatable, involuntary unlearned motor responses to stimuli

Question 38

reflex activity does

Answer 38

- protects body from harm -some reflexes coordinated in brain (brain stem) and some in spinal cord somatic and autonomic reflexes

Question 39

somatic reflexes

Answer 39

involve skeletal muscle contractions- like jerking hand from hot stove

Question 40

autonomic reflexes

Answer 40

not aware of- dilation of pupil

Question 41

components of reflex

Answer 41

``` 1- receptor (skin) 2- sensory neuron 3- integration center (interneuron) 4- motor neuron 5- effector- muscle ```