Ch 10

Question 1

A fascicle is bounded and defined by

Answer 1

the perimyseum

Question 2

muscle cells must have all of the following properties

Answer 2

extensibility, elasticity, contractility, conductivity, excitability

Question 3

if a tendon runs longitudinally throughout a muscle and fascicles insert obliquely on it along both sides, the muscle is classified as

Answer 3

bipennate

Question 4

a muscle that holds a bone still during a particular action is called

Answer 4

a fixator

Question 5

ach receptors are found in

Answer 5

junctional folds

Question 6

single unit smooth muscle cells can stimulate each other because they have

Answer 6

gap junctions

Question 7

acetylcholine is released from organelles called

Answer 7

synaptic vesicles

Question 8

parts of the sarcoplasmic reticulum called ___ lie on each side of a T- tubule

Answer 8

terminal cisternae

Question 9

thick myofilaments consist mainly of the ___ protein

Answer 9

myosin

Question 10

sheets of fibrous connective tissue called ___ separate a muscle or muscle group from neighboring muscles

Answer 10

fasciae

Question 11

muscle contains a oxygen- storage pigment called

Answer 11

myoglobin

Question 12

skeletal muscle fibers develop by the fusion of embryonic cells called

Answer 12

myoblasts

Question 13

which of the following muscles is the prime mover in spitting out a mouthful of liquid

Answer 13

buccinator

Question 14

the word __ in a muscle name indicates a function related to the head

Answer 14

capitis

Question 15

name suprahyoid muscles

Answer 15

mylohyoid and digastric

Question 16

which muscles is an extensor of the neck

Answer 16

splenius capitis

Question 17

all of the following muscles act on the vertebral column

Answer 17

iliocostalis thoracis, longissimus thoracis, spinalis thoracis, multifidus

Question 18

a muscle that aids in chewing without moving the mandible

Answer 18

the buccinator

Question 19

the prime mover of spinal extension is the

Answer 19

erector spinae

Question 20

the ___ muscle, named for its two bellies, opens the mouth

Answer 20

digastric

Question 21

the thyrohyoid muscle attaches to the thyroid cartilage of the ___

Answer 21

Larynx

Question 22

The ___ muscles diverge like a V from the middle of the upper thorax to attachments behind the ears

Answer 22

sternocleidomastoid

Question 23

the largest muscle of the upper back is

Answer 23

trapezius

Question 24

muscle visible as small tendon between flexor carpi radialis and flexor carpi ulnaris and is absent in some people

Answer 24

palmaris longus

Question 25

What are the quadriceps femoris?

Answer 25

vastus intermedius, vastus lateralis, vastus medialis, and rectus femoris

Question 26

the triceps surae is a muscle group composed of ...

Answer 26

gastrocnemius, and soleus

Question 27

which muscles contribute to the rotator cuff?

Answer 27

supraspinatus, infraspinatus, subscapularis, the teres minor

Question 28

what actions does the trapezius perform?

Answer 28

extension of the neck, depression, elevation, and rotation of the scapula

Question 29

name muscles that extend the hip joint

Answer 29

gluteus maximus, biceps femoris, semitendinosus, semimembranosus

Question 30

both the gastrocnemius and ___ muscles insert on the heel by way of the calcaneal tendon

Answer 30

soleus

Question 31

name muscles located in the anterior compartment of the thigh

Answer 31

rectus femoris, vastus intermedius, vatus lateralis, sartorius

Question 32

the major superficial muscle of the shoulder where injections are often given, is the ___

Answer 32

deltoid

Question 33

if a muscle has the word hallucis in its name, it must cause movement of the ___

Answer 33

great toe

Question 34

pronation of the forearm is achieved by two muscles, the pronator ___ just distal to the elbow and the pronator ___ near the wrist

Answer 34

teres, quadratus

Question 35

the three large muscles on the posterior side of the thigh are collectively known by the colloquial name of ___ muscles

Answer 35

hamstring

Question 36

the patella is embedded in the tendon of the ___

Answer 36

quadriceps femoris

Question 37

the ___ muscle, named for its skeletal attachments, originates on the coracoid process of the scapula, ends on the humerus, and adducts the arm

Answer 37

coracobrachialis

Question 38

the most medial adductor muscle of the thigh is the long, slender, ___

Answer 38

gracilis

Question 39

the ___ and ___ are hip flexors that originate on the pelvis and lumbar vertebrae and converge on a shared tendon that ends on the lesser trochanter of the femur

Answer 39

iliacus, and psoas major

Question 40

if you were to ride a horse, what muscles would you use to keep your seat?

Answer 40

multifidus, rectus abdominis, latissimus dorsi, iliocostalis, iliacus, psoas major

Question 41

how do the gluteus medius and minimus prevent you from toppling over as you walk?

Answer 41

shift weight of trunk toward limb with foot on ground as other foot is lifted

Question 42

what muscle is an antagonist to the biceps femoris?

Answer 42

quadriceps femoris (rectus femoris)

Question 43

what are the two muscles that are synergists with the biceps femoris muscle?

Answer 43

semimembranosus, semitendinosus

Question 44

are all the hamstring muscles identical in action?

Answer 44

yes, thigh extension and knee flexion

Question 45

what is the action of the hamstring muscles?

Answer 45

thigh extension and knee flexion

Question 46

what is the distal attachment of all the muscles of the quadriceps group?

Answer 46

patella, tibial tuberosity, lateral and medial condyles of tibia

Question 47

how does the action of the rectus femoris differ from that of the other quadriceps muscles?

Answer 47

thigh flexion (at hip)

Question 48

how many thigh adductor muscles are there?

Answer 48

sartorius, adductor magnus, adductor longus, gracilis

Question 49

list two muscles that are responsible for thigh flexion

Answer 49

tensor fascaie latae, rectus femoris

Question 50

where do the hamstring muscles have their superior attachment as a group?

Answer 50

ischial tuberosity

Question 51

what is the action of the vastus lateralis?

Answer 51

extension and stabilization of the knee, retains patella in groove on femur during knee movements

Question 52

which muscle group is found on the anterior part of the thigh?

Answer 52

quadriceps

Question 53

what muscle flexes the lumbar vertebrae as part of its action?

Answer 53

iliocostalis

Question 54

what is the proximal attachment of the gastrocnemius?

Answer 54

calcaneus

Question 55

what is the distal attachment of the tibialis anterior?

Answer 55

medial cuneiform, metatarsal 1

Question 56

what is the action of both the fibularis longus and the brevis?

Answer 56

plantar flexion and foot eversion

Question 57

what is the action of the flexor hallucis longus?

Answer 57

hallux flexion

Question 58

the calf is made of two major muscles

Answer 58

gastrocnemius, and soleus

Question 59

what muscle flexes the toes?

Answer 59

flexor digitorum longus

Question 60

muscle that dorsiflexes the foot

Answer 60

tibialis anterior

Question 61

Plantar flexion and eversion of the foot occur by what muscles?

Answer 61

fibularis longus, fibularis brevis

Question 62

what is the distal attachment of the soleus?

Answer 62

calcaneus

Question 63

what is the action of the tibialis anterior

Answer 63

dorsiflexion and inverts foot

Question 64

what is the distal attachment of the flexor digitorum longus?

Answer 64

distal phalanges 2-5