Bio23 Final Chapter 10 THE MUSCULAR SYSTEM

fascicle

A bundle of muscle fibers surrounded by perimysium is called a/an______ .

sphincter

A circular muscle that closes a body opening is called a/an_____ .

bipennate

A muscle somewhat like a feather, with fibers obliquely approaching its tendon from both sides, is called a/an ______muscle.

synergist

A muscle that works with another to produce the same or similar movement is called a/an______.

true

Both the extensor digitorum and extensor digiti minimi extend the little finger.

soleus

Both the gastrocnemius and____ muscles insert on the heel by way of the calcaneal tendon. a. semimembranosus b. tibialis posterior c. tibialis anterior d. soleus e. plantaris

the abductor digiti minimi.

Both the hands and feet are acted upon by a muscle or muscles called a. the extensor digitorum. b. the abductor digiti minimi. c. the flexor digitorum profundus. d. the abductor hallucis. e. the flexor digitorum longus.

flexor retinacula

Connective tissue bands called______ prevent flexor tendons of the forearm and leg from rising like bowstrings.

true

Curling the toes employs the quadratus plantae.

true

Cutting the phrenic nerves would paralyze the prime mover of respiration.

the endomysium.

Each muscle fiber has a sleeve of areolar connective tissue around it called a. the fascia. b. the endomysium. c. the perimysium. d. the epimysium. e. the intermuscular septum.

False: Normal exhalation does not employ these muscles.

Exhaling requires contraction of the internal intercostal muscles.

False: They result from rapid extension of the knee, not flexion.

Hamstring injuries often result from rapid flexion of the knee.

linea alba

The abdominal aponeuroses converge on a median fibrous band on the abdomen called the____.

urogenital triangle

The anterior half of the perineum is a region called the_____.

true

The orbicularis oculi is a sphincter.

False: The mastoid process is its insertion.

The origin of the sternocleidomastoid muscle is the mastoid process of the skull.

False: The trapezius is superficial to the scalenes.

The scalenes are superficial to the trapezius.

hamstring

The three large muscles on the posterior side of the thigh are commonly known as the______muscles.

False: They are on opposite sides of the tibia and act as antagonists.

The tibialis anterior and tibialis posterior are synergists.

origin

The____ of a muscle is the point where it attaches to a relatively stationary bone.

prime mover (agonist)

The______is the muscle that generates the most force in a given joint movement.

true

To push someone away from you, you would use the serratus anterior more than the trapezius.

quadriceps femoris

Which of the following muscles does not extend the hip joint? a. quadriceps femoris b. gluteus maximus c. biceps femoris d. semitendinosus e. semimembranosus

buccinator

Which of the following muscles is the prime mover in spitting out a mouthful of liquid? a. platysma b. buccinator c. risorius d. masseter e. palatoglossus

zygomaticus minor

Which of the following muscles raises the upper lip? a. levator palpebrae superioris b. orbicularis oris c. zygomaticus minor d. masseter e. mentalis

adduction of the humerus

Which of these actions is not performed by the trapezius? a. extension of the neck b. depression of the scapula c. elevation of the scapula d. rotation of the scapula e. adduction of the humerus

genioglossus

Which of these is not a suprahyoid muscle? a. genioglossus b. geniohyoid c. stylohyoid d. mylohyoid e. digastric

splenius capitis

Which of these muscles is an extensor of the neck? a. external oblique b. sternocleidomastoid c. splenius capitis d. iliocostalis e. latissimus dorsi

levator ani

Which of these muscles of the pelvic floor is the deepest? a. superficial transverse perineal b. bulbospongiosus c. ischiocavernosus d. deep transverse perineal e. levator ani