A & P Chapter 9 Lecture

which of these muscles elevates the mandible during chewing

A- the masseter muscle

What is the term used to describe the muscle action that pulls toward the midline?

Adductor

Which of the following muscles is not a smaller muscle part of the of the levator ani muscle group that forms the pelvic floor?

Anococcygeal

Which functional group of muscles tends to oppose and slow the action of prime movers?

Antagonists

What muscles are included in the hamstring group?

Biceps Femoris, Semitendinosus,& Semimembranosus

What is the prime mover of elbow flexion?

Brachialis

What facial muscle would you use to whistle?

Buccinator

What muscle is responsible for spreading the fingers to signal the number 5?

Dorsal interossei

What is the connective tissue layer that wraps around the many fascicles of a whole muscle?

Epimysium

What muscle of the hand extends the index finger only?

Extensor indicis

Which muscle is responsible for the thumbs up motion?

Extensor pollicis longus

Which muscle provides voluntary control of defecation?

External anal sphincter

The primary mover of elbow flexion is biceps brachii? true or false

False the primary mover is the the biceps brachialis

Which muscle protrudes the tongue, allowing you to lick an ice cream cone?

Genioglossus

Which of the erector spinae muscles is most lateral to the vertebral column?

Iliocostalis muscle

What is the only extrinsic eye muscle to originate from the anterior orbit?

Inferior oblique

Which muscle decreases the volume of the thoracic cavity to promote expiration?

Internal intercostal

What can you tell about a muscle whose name includes the word serratus?

Its appearance is serrated or jagged.

Which muscle is a powerful agonist of adduction and medial rotation of the arm?

Latissimus dorsi

Which is not a component of a lever system?

Levator

Which muscle works as an antagonist to orbicularis oculi?

Levator palpebrae superioris

What is the largest and most powerful muscle of the erector spinae muscle group?

Longissimus thoracis

Which of the following bones is not attached to the sternocleidomastoid muscle? a)Sternum b)Clavicle c)Mandible

Mandible

Which extrinsic eye muscle only performs medial rotation of the eye?

Medial rectus muscle

Which of the following muscles does not depress the hyoid?

Mylohyoid

What influences the appearance and function of skeletal muscles?

Pattern in which fascicles are arranged

With which muscle is the linea alba most closely associated?

Rectus abdominis

name this muscle

Sartorius

What is the key muscle in throwing a punch?

Serratus anterior

Which of the following muscles is not involved in the movement of the tongue to manipulate food while chewing and pushing the bolus of food into the throat?

Stylohyoid

What extrinsic eye muscle is controlled by the trochlear nerve?

Superior oblique

Which type of muscle works together with the agonist?

Synergist

Which of the following is not a muscle of the rotator cuff? a)Supraspinatus b)Subscapularis c)Teres minor d)Teres major

Teres major

What two muscles are the principle lateral rotators of the arm?

Teres minor and infraspinatus

In the human body, what function is the fulcrum in a lever system?

The fulcrum is the joint at which the movement occurs

Which abdominal muscle's only action is to compress the abdominal cavity?

Transversus abdominis

Which muscle has an inferior, middle, and superior part in which each has a different origin, insertion, and action?

Trapezius

Which of the following muscles raises the head when in a bowed position?

Trapezius

the name flexor pollicis refers to

a short muscle that flexes the thumb

Which of the following is a neck muscle? a) platysma b)serratus anterior c)mentalis d)gracilis

a)platysma

The deltoid is responsible for __________.

abducting the arm

Which of the following muscles is named for its action? a) deltoid b) biceps brachii c)gluteus maximus d)adductor magnus

adductor magnus

Triceps brachii and biceps brachii perform opposing actions and are classified as __________.

antagonists

Where are the flexors of the hand located?

anterior and medial forearm

Which muscle's most powerful action is to supinate the forearm?

biceps brachii

When walking what muscle flexes your forearm?

brachioradialis

occurs when a bursa is inflamed from trauma or overuse

bursitis

Which of these muscles is located on the posterior surface of the arm? d)biceps brachii b)deltoid latissimus dorsi c)triceps brachii

c) triceps brachii

The masseter and temporalis muscles provide much of the force for __________.

chewing

The name orbicularis oris means "__________."

circular muscle in the mouth area

What is the main muscle of inspiration?

diaphragm

occurs when the bones in a joint are forcibly pulled apart

dislocation

The tibialis anterior causes

dorsiflexion and inversion of the foot

The gluteusmaximus muscle.....

extends, abducts, and laterally rotates the thigh

is the most superficial abdominal muscle, which flexes & rotates the trunk

external oblique

from superficial to deep, the three muscles of the lateral abdominal wall:

external oblique, internal oblique, transversus abdominis

A muscle that anchors a bone in place to make the movement more efficient is a(n) __________.

fixator

occurs when a bone is cracked or broken

fracture

What muscle elevates the eye brows?

frontalis

Which muscle abducts the thigh, medially rotates the thigh and pelvis of the moving limb during walking?

gluteus minimus

Where does the infraspinatus insert?

greater tubercle of humerus

occurs when a deeper abdominal structure or organ protrudes through a weakening in the abdominal wall

hernia

lliopsoas is formed by the union of two muscles known as:

iliacus and psoas major

name this extrinsic eye muscle

inferior rectus muscle

Which of the following functions is not a function caused by the compression of the four abdominal muscles? a) inhalation b) childbirth c) defecation d) coughing

inhalation

What is the movable end of a muscle attachment called?

insertion

The area circled on the figure is

insertion of biceps brachii

flexes and rotates the trunk

internal oblique

The less movable, anchoring point on a bone is called the

origin

What muscle has an origin of the medial clavicle, sternum and costal cartilages 1-7, and an insertion of the greater tubercle and lateral lip of intertubercular sulcus of humerus?

pectoralis major

What muscle is a powerful agonist of arm flexion?

pectoralis major

Which fascicle arrangement has fascicles that attach to the tendon at an angle in such a way that the muscle resembles a feather?

pennate

The insertion of the extensor digitorum longus muscle is the

phalanges and connective tissues of the toes

what is the correct action of this muscle

plantar flexion of the foot

What muscle is responsible for the open-mouthed, "jaw-dropping" look of horror?

platysma

Muscles that move the thumb will be named using the term:

pollicis

What is the muscle location term that means deep?

profundus

The insertion of biceps brachii muscle is the.......

radial tuberosity

What muscles will be used to flex the trunk while performing sit ups?

rectus abdominis

Which muscle is the agonist for sitting up?

rectus abdominis

flexes and the trunk, but does not rotate it

rectus abdominis

What muscle extends the leg at the knee joint?

rectus femoris

What kind of lever system is this?

second class

From medial to lateral, what are the muscles of the hamstring group?

semimembranosus, semitendinous, biceps femoris

Where does the mentalis muscle insert?

skin of chin

occurs when a ligament is stretched or torn

sprain

occurs when a muscle is over stretched, it is also known as a pulled muscle

strain

Which extrinsic eye muscle elevates the eye upward, as in looking up?

superior rectus muscle

in a first class lever,

the fulcrum is located between the load and the force

a lever system works at a mechanical advantage when:

the fulcrum is located farther from the applied force

in a muscle,

the origin that elevates a structure is generally located above that structure

The neck muscles, with an origin at the sternum and clavicle, and an insertion at the mastoid process of the temporal bone, are the __________

the sternocleidomastoid muscles

When the diaphragm contracts

the volume of the thoracic cavity increases

Most levers in the human body are __________.

third class levers

A muscle that dorsiflexes the foot is the

tibialis anterior

Which muscle is an antagonist to the gastrocnemius muscle?

tibialis anterior

What is a correctly paired agonist and antagonist group of muscles?

tibialis anterior & gastrocnemius tibialis anterior is involved in dorsiflexion of the foot while gastrocnemius is involved in the plantar flexion

is the deepest abdominal muscle & does not cause the trunk movement, but assists in compressing the abdominal cavity

transverse abdominis

Which of the following muscle is named using a directional term? a) gastrocnemius b)vastus lateralis c)adductor longus d)orbicularis oris

vastus lateralis