Lab Exam 4

Question 1

Function of epicranius? (frontal & occipital belly)

Answer 1

Lift eyebrows and forehead wrinkles

Question 2

Where dose the temporalis originate and insert?

Answer 2

ORGIN: parietal bone INSERT: coronoid process

Question 3

Function of obicularis oculi? and oris

Answer 3

Close your eye tight
ORIS: pucker lips

Question 4

What happens to the neck when you turn your neck to the LEFT?

Answer 4

When you turn your head to the left, the right strenocleidomastoid is contracting and the left splenius capitis is working.

Question 5

What is are some antagonist muscles?

Answer 5

Masseter is antagonist to platysma. Biceps brachii(flex arm) is antagonist to triceps brachii(extend arm). Extensor carpi ulnaris is antagonist to flexor carpi ulnaris.

Question 6

Where dose biceps brachii originate and insert? and FUNCTION

Answer 6

FLEX elbow! ORGIN: coracoid process and glenoid fossa INSERT: radial tuberosity

Question 7

Which muscles or synegist?

Answer 7

Flexor carpi radialis is synegist to flexor carpi unaris. Temporalis is synegist to masseter(both elevate mandible). external oblique is synegist to rectus adominus(both flex truck).

Question 8

Which muscles are multinucleated?

Answer 8

Only skeletal! the rest are mono-nucleated

Question 9

Where dose the triceps brachii originate and insert? and function

Answer 9

extendthe elbow ORGIN: lateral calavicle and spine of scapula INSERT: olocreon process

Question 10

2 largest back muscles

Answer 10

Latissimus dorsi(ABDUCT humerus) and trapezius (stabilize and move scapula)

Question 11

define flexion

Answer 11

decreasing a joint angle

Question 12

define extension

Answer 12

increasing a joint angle

Question 13

define abductor

Answer 13

away from the midline

Question 14

define adductor

Answer 14

towards the midline

Question 15

define origin and insertion

Answer 15

ORIGIN- anchors the bone(no movement) INSERT- the site where bone and muscle are attached and move during contraction

Question 16

subscapularis, infraspinatus, teres minor, supraspinatus are what?

Answer 16

4 muscles of the rotator cuff.
subscapularis(medial rotate) Supraspinatus(abducts the arm).

Infraspinatus(adducts and lateral rotate) teres minor(same thing)

Question 17

Difference between lateral rectus and medial rectus?

Answer 17

Lateral rectus- abduct the eyeball(away from midline). Medial rectus(on other side)- adduct the eyeball

Question 18

explain internal intercostal

Answer 18

BREATHING OUT, it decreases the thoratic cage during exhalation.

Question 19

explain enxternal intercostal

Answer 19

BREATHING IN. it expands the thoratic cavity during inhaling and works with DIAPHRAGM.

Question 20

Function and fibers of the trapezius?

Answer 20

Upper fiber- elevates the scapula
middle fiber- abduct the scapula
lower fiber- depress scapula

Trapezius- stablize and move scapula

Question 21

Function of serractus anterior?(knife shaped)

Answer 21

Protract the scapula

Question 22

Erector spinae includes

Answer 22

liocostalis, longissimus, spinalis(extension of the trunk)

Question 23

Explain planterflextion ?

Answer 23

Planter flexion- extension of the ankle in downward motion. caused by gastrocenminus and soleus.

Question 24

Name the functions of the longest human muscle?

Answer 24

Sartouris! flex the hip, lateral rotate, abducts. Named after tailor sitting pose.

Question 25

Antagonist to glutes maximus?

Answer 25

Glutes maximus(extend the hip) is antagonist to rectus femoris(flex the hip).

Question 26

Antagonist to vastus medialralis?

Answer 26

vastus medialralis(extend leg) is antagonist to biceps femoirs(flex the leg)

Question 27

3 muscles that flex the hip?

Answer 27

sartouris, rectus femoris, tensor faiscae latae.

Question 28

3 fibers of deltiod(allows for the abduction and adduction of the arm)?

Answer 28

Anterior fiber- flex the arm
medial fiber- abduct the arm
posterior fiber- extends the arm

Question 29

Origin and insertion of deltoid ?

Answer 29

Orginates on the lateral clavicle and spine of the scapula. Inserts on detiold tuberosity of humerus.

Question 30

Muscle that abducts(extend) the arm?

Answer 30

extensor carpi radials longus. extensor carpi ulnaris

Question 31

Muscle that abducts the thigh?

Answer 31

Tensor fasciae latae

Question 32

what muscles flex the leg

Answer 32

semitendinosus, semimembranosus, biceps femoris.

Question 33

which muscle flex the forarm

Answer 33

biceps brachii, brachialis, brachioradialis

Question 34

pectoralis minor origin and function?

Answer 34

orginates on ribs 3-5 and coracoid process. protects/ abduct the scapula

Question 35

muscle named after how big it is

Answer 35

gluteus maximus

Question 36

rectus femoris origin and insert?

Answer 36

ORGIN: ilium portion of hip bone and INSERT: patella

Question 37

which muscles abduct the thigh

Answer 37

gluteus medials, sartourisand tensor fascaie latae

Question 38

which muslce in charge of planter flexion and dorsiflextion?

Answer 38

tibula anterior(dorsifelxion) soleus and gastrocnemius(planter)

Question 39

Explain the axon terminal function?

Answer 39

Once the action potential reaches the end of the axon terminal, it causes the neurotransmitter acetylcholine to diffuse across the synaptic cleft and bind to the muscle fiber receptors, thereby initiating a muscle contraction.

Question 40

Neuromuscular junction?

Answer 40

synapes between motot plate and axon terminal.

Question 41

Rectus abdominus origin?

Answer 41

originates on the chest of pubis. Inserts on costal cartilage.