A&P Exam 4

Which of the followoing muscles is a flexor of the thigh at the hip?

adductor magnus

What do the genioglossus, hyoglossus, and styloglossus muscles have in common?

all act on tongue

What is a muscle that provides the major force for producing a specific movement called?

an agonist (prime mover)

A muscle that opposes, or reverses, a particular movement is a(n) ________.

antagonist

A nursing infant develops a powerful sucking muscle that adults also use for whistling or blowing a trumpet called the:

buccinator

The _______ helps keep food between the grinding surfaces of teeth during chewing.

buccinator

The ______ extends the great toe.

extensor hallucis longus

Which of these is the function of the external oblique muscles?

flex vertebral column and compress abdominal wall

Which of the following is NOT a member of the hamstrings?

gracilis

Paralysis of which of the following would make an individual unable to flex the thigh?

iliopsoas and rectus femoris

First class levers _________.

in the body can operate at a mechanical advantage or mechanical disadvantage, depending on specific location

The sternocleidomastoid muscle inserts on the ______.

mastoid process of the temporal bone

What are the levers that operate at a mechanical advantage called?

power levers

Which of the following muscles fixes and stabilizes the pelvis during walking?

rectus abdominis

The quadriceps femoris is composed of three vastus muscles and the__________.

rectus femoris

The ________ is a synerist of the latissmus dorsi; it extends, medially rotates, and adducts the humerus.

teres major

Tennis players often complain about pain in the arm (forearm) that swings the racquet. What muscle is usually strained under these conditions?

the brachioradialis

What is the major factor controlling how levers work?

the difference of the positioning of the effort, load, and fulcrum.

Which of the following muscles is involved in producing horizontal wrinkles in the forehead?

the frontal belly of the epicranius

Which of the following muscles inserts to the posterior calcaneus via the calcaneal tendon?

the gasrocnemius

When the term biceps, triceps, or quadriceps forms part of a muscle's name, what does it tell you about the muscle?

the muscle has two, three, or four origins respectively

Which of the following muscles is involved in crossing one leg over the other to produce the cross-legged position?

the sartorius

What is the main factor that determines the power of a muscle?

the total number of muscle fibers (cells) available for contraction

Which muscle group is involved when a "pulled groin" occurs?

thigh adductors

if L=Load, F=fulcrum, and E=effort, what type of lever system is described as LEF?

third class lever

The supraspinatus is named for its location on the posterior aspect of the scapula above the spine. What is its action?

to initiate abduction of the arm, to stabilize the shoulder joint and to help prevent downward dislocation of the humerus.

The ________ runs deep to the internal oblique.

transversus abdominis