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