Anatomy Lab Mastering Questions Test #2 Muscular System Gross Anatomy 1+2

gluteus maximus is the most powerful muscle during

extension

brachioradialis is a strong forearm

flexor

which superficial flexor muscle of the forearm is the most lateral

flexor carpi radialis

origin of the long head of the triceps brachii is on the

infraglenoid tubercle of scapula

which muscle is considered one of the four rotator cuff muscles biceps brachii coracobrachialis infraspinatus pectoralis minor

infraspinatus

which muscle is not part of the rotator cuff teres major teres minor infraspinatus supraspinatus

teres major

abduction requires the action of two muscles and adduction requires the action of

4 muscles

without lateral rotation of the humerus by the teres minor and infraspinatus muscles, the maximum angle of abduction by the deltoid would be

90 degrees

Indicate whether the rectus femoris is located on the anterior (A) or posterior (P) surface of the thigh, and then indicate its action (either flexes or extends the leg).

A; extends leg

Indicate whether the vastus lateralis is located on the anterior (A) or posterior (P) surface of the thigh, and then indicate its action (either flexes or extends the leg).

A; extends leg

indicate whether the biceps brachii is located on the anterior (A) or the posterior (P) surface of the body and then indicate the action of the muscle

A; flexes and supinates the forearm

Indicate whether the flexor carpi radialis is located on the anterior (A) or the posterior (P) surface of the body and then indicate the action of the muscle.

A; flexes wrist and abducts the hand

key actions of the pectoralis major muscle are

Medial rotation and adduction

Indicate whether the triceps brachii is located on the anterior (A) or the posterior (P) surface of the body and then indicate the action of the muscle.

P; extends elbow

Indicate whether the extensor digitorum is located on the anterior (A) or the posterior (P) surface of the body and then indicate the action of the muscle.

P; extends fingers and wrist

Indicate whether the extensor carpi ulnaris is located on the anterior (A) or the posterior (P) surface of the body and then indicate the action of the muscle.

P; extends wrist and adducts hand

Indicate whether the bicep femoris is located on the anterior (A) or posterior (P) surface of the thigh, and then indicate its action (either flexes or extends the leg).

P; flexes leg

distinguish between the triceps brachii and biceps brachii in terms of location and function

Triceps brachii is only muscle on posterior side of the arm, and it extends the forearm. The biceps brachii is found on the anterior side of the arm and flexes and supinates the forearm.

Indicate whether the vastus medialis is located on the anterior (A) or posterior (P) surface of the thigh, and then indicate its action (either flexes or extends the leg).

a; extends leg

teres major adducts the arm but does not ______ the arm

abduct

middle fibers of the deltoid muscle

abduct the arm

movement of the shoulder laterally away from the body is called

abduction

tensor fascia latae is involved in hip

abduction

which deep posterior extensor of wrist originates on the radius and ulnar and interosseous membrane

abductor pollicis longus

the gluteus medius muscle

abducts and medially rotates the thigh

primary function of the pectoral girdle

act as an attachment site for muscles that move the arm

one of the actions of the latissimus dorsi muscle is to

adduct the arm

a reduction in the lateral angle of the glenohumeral joint in relation to the anatomical position would be called

adduction

pectineus muscle _________ the thigh

adducts and flexes

which term is a synonym for a prime mover

agonist

which of the following is not true of the deep fascia of the leg separates anterior and posterior muscles aids in venous return prevents excess swelling of the muscles an insertion for the majority of lower leg muscles

an insertion for the majority of lower leg muscles

smallest of the posterior extensors of the elbow joint is the

anconeus

deltoid muscle fibers are separated into

anterior middle posterior

which of following groups of muscles are not muscles of the shoulder muscles that act on the pectoral girdle the anterior flexor muscles muscles that stabilize and cross the glenohumeral joint the rotator cuff muscles

anterior flexor muscles

transversus abdominus muscle lies

below the internal oblique

which set of muscles is primarily used when doing bar chin-ups

biceps brachii muscle

which muscle is a lateral hamstring

biceps femoris

muscle that generates the most power during elbow flexion is the

brachialis

which muscle is located deep to the biceps brachii

brachialis

which of the following muscles is not part of the shoulder subscapularis brachialis supraspinatus infraspinatus

brachialis

pectoral girdle consists of the

clavicle and scapula

pectoralis major muscle can be divided into groups of fibers superior, or ___________, and inferior, or ___________

clavicular sternocostal

rectus abdominus muscle

compresses abdominal cavity

actions of the internal obliques include

compression of abdomen and assist in forced expiration

deep posterior extensor of the wrist and fingers

controls thumb and index finger

brachialis muscle is located __________ to the biceps brachii muscle

deep

forearm muscles can be divided into anterior flexors and posterior extensors, as well as, __________________

deep and superficial layers

of the nine muscles that cross the shoulder joint and insert on the humerus, which muscle is considered to be a prime mover

deltoid

the _________ is a prime move of the glenohumeral joint during flexion

deltoid

why are the muscles that move the fingers and wrist located in the forearm

design allows the hand to maintain fine motor control and strength without the interference of bulky muscles

what muscle is dome-shaped and functions in inspiration

diaphragm

muscles of the shoulder can be divided into groups based on

distribution and functional relationships

function of the levator scapula

elevate scapula

temporalis muscle

elevates and retracts mandible

action that moves the scapula towards the head is called

elevation

main action of the fibularis longus is to

evert foot

action of the extensor digitorum longus muscle is to

extend digits

vastus intermedius _________ the leg at the knee

extends

semimembranosus _________ the thigh and the hip and ___________ the leg and the knee

extends flexes

acting bilaterally, the splenius captitis

extends head

movement of the elbow joint movement is limited ot

flexion and extension

prime mover of hip extension

gluteus maximus

in which muscle are intramuscular injections into the hip given

gluteus medius

gastrocnemius muscle

has two heads plantar flexes the foot assists in flexion of leg at knee

origin of the flexor carpi radialis is on the

humerus

which muscle flexes the thigh toward the trunk

iliopsoas

iliacus and psoas major muscles are collectively known as the __________ muscle because they share a common insertion on the ___________ of the femur

iliopsoas; lesser trochanter

carpal tunnel syndrome is characterized by

inflammation of the flexor retinaculum and/or tendon sheaths

masseter is the prime mover of

jaw closure

rectus femoris muscle extends the leg at the

knee

tensor fasciae latae stabilizes the hip joint and the _________ joint

knee

trapezius muscle may be separated into all of the following groups except inferior lateral middle superior

lateral

origin of the supinator is the

lateral epicondyle of humerus

actions of the rhomboid major on the scapula do not include lateral rotation elevation medial rotation adduction

lateral rotation

posterior axial muscle that crosses the glenohumeral joint is the

latissimus dorsi

the four muscles the comprise the posterior group of the pectoral girdle are the

levator scapula rhomboideus minor rhomboideus major trapezius

function of buccinator

manipulate food while chewing

what movement is not associated with the scapula elevation opposition depression protraction

opposition

which muscle closes the eye

oribicularis oculi

which muscle is used when giving your grandmother a kiss on the cheek

oribularis oris

Indicate whether the semitendinosus is located on the anterior (A) or posterior (P) surface of the thigh, and then indicate its action (either flexes or extends the leg).

p; flexes leg

palmaris longus inserts on the

palmar aponeurosis

movement of the forearm includes

pronation and supination

of all the flexor muscles of the forearm, the _______ is the shortest

pronator teres

which of the following statements about muscles of the forearm is true: The pronator quadratus originates on the radius and inserts on the ulna. The pronator teres originates on the medial epicondyle and inserts on the radius. Contraction of the pronator quadratus and the supinator results in forearm pronation. The pronator quadratus is a two-headed muscle.

pronator teres originates on the medial epicondyle and inserts of radius

two heads of the biceps brachii combine to insert of the

radial tuberosity

two heads of the biceps brachii muscle come together distally to insert on the

radial tuberosity

the interosseous membrane is located between the

radius and ulna

which muscle is a hip flexor semitendinosus rectus femoris biceps femoris vastus medialis

rectus femoris

which criterion was used to name the gluteus maximus

relative size

which muscle elevates the scapula rhomboid major infraspinatus teres minor latissimus dorsi

rhomboid major

which of the following muscles is one of the rotator cuff muscles Triceps brachii Trapezius Supraspinatus Pectoralis major Latissimus dorsi

supraspinatus

downward dislocation of the humerus from the glenohumeral joint when carrying weight is prevented by the

supraspinatus muscle

which of the following muscles assists during extension of the glenohumeral joint, but is not as a prime mover

teres major

t/f teres minor muscle laterally rotates the arm

true

t/f the anterior axial muscle that crosses the glenohumeral joint is the pectoralis major muscle

true

the actions of the extensor carpi radialis brevis are localized to the

wrist

flexor carpi ulnaris

adducts the wrist

forearm supination is assisted by the

biceps brachii

which muscle is located primarily in the posterior antebrachial region

extensor carpi ulnaris

extensor muscle that branches to form 4 tendons on the back of the hand is

extensor digitorum

prime mover of wrist extension

extensor digitorum

which muscle functions in extensions of the digits of the hand

extensor digitorum

which muscle extends the toes semimembranosus extensor digitorum longus sartorius soleus

extensor digitorum longus

t/f both the psoas major muscle and iliacus muscle extend the thigh

false

t/f function of the subscapularis muscle is to rotate arm laterally

false

eversion of the foot is a function of the

fibularis longus

both heads of the biceps femoris muscle

flex the leg at the knee

the soleus muscle _______ the foot at the ankle

flexes

which muscle is a superficial anterior flexor muscle

flexor digitorum superficialis

which muscle of the wrist and fingers is a deep anterior flexor

flexor pollicis longus

actions of the internal intercostals are most important during

forced expiraiton

wrist abduction occurs through the actions of _______ muscles

four

insertion of the extensor digitorum branches into

four tendons

in order for a ballerina to dance on point, which set of muscles would she use

gastrocnemius and soleus

rotator cuff is a term used to describe the group of muscle and tendons that stabilize and reinforce the

glenohumeral joint

which term describes the site of a muscle attaching to the bone that moves the most

insertion

external intercostals elevate the rib cage during

inspiration

all fibers of the pectoralis major muscle converge on the lateral edge of the

intertubercular sulcus

actions of the muscles that cross the hip do not include

inversion

tibilias anterior muscle dorsiflexes the foot at the ankle and also assists in ________ of the foot

inversion

which statement is true of the triceps but false of the biceps brachii It extends the forearm. It has two muscle bellies. It is located in the anterior brachial region. It flexes the elbow.

it extends the forearm

carnivores such as a lion are able to kill their prey because of powerful jaw muscles. we humans do not need this power in our jaw muscles. which muscle is more powerful in the carnivore than the human

masseter

what muscle is a major chewing muscle

masseter

insertion of the extensor carpi radialis longus muscle is on

metacarpal 2

which of the following statements about muscles of the elbow joint is true: The biceps brachii is a posterior extensor.T he biceps brachii has two heads that share the same origin site. The brachioradialis originates and inserts on the ulna. None of these statements is correct.

none

the most powerful movement at the ankle joint is ____________, and the __________ is one of teh prime movers of this movement

plantar flexion gastrocnemius

to allow for flexion, the _________ unlocks the knee joint

popliteus

semitendinosus muscle lies __________ to the semimembranosus muscle

posterior

biceps femoris is located in

posterior thigh

muscles that extend the forearm are located

posteriorly

ball and socket joint in the hip is similar to the ball and socket joint of the shoulder but is designed more for ________ than _________

power than precision

which movement results after the contraction of the serratus anterior muscle

scapular protraction and rotation

which muscle is located on posterior thigh rectus femoris vastus lateralis semitendinosus vastus medialis

semitendinosus

to allow movement of the tendons within the carpal tunnel zone, each tendon is encased in a

sheath

which joint is considered the most flexible joint in the body

shoulder joint

what muscle is deep to the gastrocnemius

soleus

all fibers of the trapezius muscle are innervated by the

spinal accessory nerve

angle of which muscle prevents the humeral head from sliding upward out of the joint as the arm is raised

subscapularis

rhomboid minor muscle sits

superior to the rhomboid major

muscles that act on the knee joint form most of the mass of the

thigh

prime mover of dorsiflexion is the

tibialis anterior

prime mover of elbow extension is the

triceps brachii

pectoralis minor muscle protracts and depresses scapula (t/f)

true

supraspinatus muscle abducts the arm and stabilizes the shoulder joint (t/f)

true

t/f action of both vastus medialis and vastus lateralis is to extend the leg at the knee

true

t/f function of the external obliques includes flexing and laterally bending the trunk

true

t/f sartorius muscle flexes and laterally rotates the leg at the knee

true