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
