Paralysis of which of the following would make an individual unable to flex the thigh?
soleus
biceps femoris
iliopsoas and rectus femoris
vastus medialis
question
the vastus lateralis
answer
Which of the following muscles serves as a common intramuscular injection site, particularly in infants as the buttocks and arm muscles are poorly developed?
the vastus intermedius
the vastus medialis
rectus femoris
the vastus lateralis
question
True
answer
T/F Deep muscles of the thorax promote movements for breathing.
question
True
answer
T/F The muscles of facial expression insert into skin or other muscles, not bones.
question
False
answer
T/F Although all skeletal muscles have different shapes, the fascicle arrangement of each muscle is exactly the same.
question
the frontal belly of the epicranius
answer
Which of the following muscles is involved in producing horizontal wrinkles in the forehead?
the zygomaticus major
the temporalis
the frontal belly of the epicranius
the medial pterygoid
question
transversus abdominis
answer
The ________ runs deep to the internal oblique.
rectus abdominis
latissimus dorsi
external oblique
transversus abdominis
question
a synergist
answer
What type of muscle assists an agonist by causing a like movement or by stabilizing a joint over which an agonist acts?
a prime mover
an antagonist
a synergist
an agonist
question
better-stabilized knee joint
answer
What benefit would an improved muscle tone from strengthening the quadriceps femoris muscles provide?
enhanced lateral thigh abduction
better-stabilized knee joint
more rapid knee flexion
greater control of thigh adduction
question
hamstring muscles
answer
Paralysis of which of the following muscles would make an individual unable to flex the knee?
gluteal muscles
brachioradialis
soleus
hamstring muscles
question
adductor magnus
answer
Which of the following muscles is a flexor of the thigh?
gluteus maximus
vastus lateralis
tibialis posterior
adductor magnus
question
the diaphragm
answer
Which of the following muscles does the phrenic nerve innervate?
the internal intercostals
the external intercostals
the diaphragm
the sternocleidomastoid muscles
question
the scalenes
answer
Which group of muscles elevates the first two ribs and flexes and rotates the neck?
the splenius
the spinalis
the scalenes
the iliocostalis
question
the difference in positioning the effort, load, and fulcrum
answer
What is the major factor controlling how levers work?
the weight of the load
the direction the load is being moved
the difference in the positioning of the effort, load, and fulcrum
the structural characteristics of the muscles of the person using the lever
question
False
answer
T/F Muscles that help to maintain posture are best described as synergists.
question
the gastrocnemius
answer
Which of the following muscles inserts to the posterior calcaneus via the calcaneal tendon?
the semitendinosus
the sartorius
the gastrocnemius
the tibialis anterior
question
antagonist
answer
muscle that opposes and reverses the action of another muscle
question
fixator
answer
muscle that stabilizes the origin of another muscle
question
agonist
answer
muscle that is primarily responsible for bringing about a particular movement
question
synergist
answer
muscle that aids another by promoting the same movement
question
True
answer
T/F The diaphragm flattens and moves inferiorly during inspiration.
question
antagonist
answer
A muscle that opposes, or reverses, a particular movement is a(n) ________.
fixator
antagonist
agonist (prime mover)
synergist
question
vastus intermedius
answer
Which of the following muscles is NOT a member of the hamstrings group?
semimembranosus
vastus intermedius
biceps femoris
semitendinosus
question
gracilis
answer
Which of the following is not a member of the hamstrings?
semitendinosus
semimembranosus
gracilis
biceps femoris
question
the total number of muscle fibers (cells) available for contraction
answer
What is the main factor that determines the power of a muscle?
the number of neurons innervating it
the total number of muscle fibers (cells) available for contraction
the length
the shape
question
False
answer
T/F A pair of tweezers is a good example of a second-class lever.
question
rectus; straight
answer
Which of the following are correctly matched?
transverse; parallel to the long axis
brevis; long
rectus; straight
deltoid; at a right angle to the long axis
question
3rd choice
answer
A young pregnant woman went to a childbirth class and the instructor informed them about strengthening the muscles of the pelvic floor. What are these muscles, and why should she strengthen them?
Gluteus maximus, coccygeus, and levator ani; strengthening these muscles helps in correctly positioning and orienting the child prior to birth.
Perineal muscle, levator ani, and coccygeus; strengthening these muscles helps in the delivery of the child by resisting downward forces when "pushing."
Levator ani and coccygeus; strengthening these muscles helps in the delivery of the child by resisting downward forces when "pushing."
Ischiocavernosus, coccygeus, and gluteus maximus; strengthening these muscles helps in correctly positioning and orienting the child prior to birth.
Coccygeus and gluteus maximus; strengthening these muscles helps in correctly positioning and orienting the child prior to birth.
question
masseter
answer
The ________ is the main chewing muscle.
masseter
buccinator
hyoglossus
lateral pterygoid
question
True
answer
t/f The calcaneal tendon (Achilles tendon) is the largest tendon in the body.
question
antagonists
answer
Which functional group has the major responsibility for countering a specific movement?
synergists
antagonists
fixators
agonists
question
biceps brachii at the elbow; third-class lever
answer
Which of the following joint muscles is correctly matched with its lever type?
biceps brachii at the elbow; third-class lever
gastrocnemius tendon at the ankle: first-class lever
trapezius action on the atlanto-occipital joint; second-class lever
triceps brachii at the elbow; third-class lever
question
true
answer
t/f Muscle spasms of the back often are due to the erector spinae contraction.
question
the nervous systems control of the muscle
answer
Which of the following is NOT used as a criterion for naming muscles?
the nervous system's control of the muscle
the location of the muscle
the number of origins for the muscle
the shape of the muscle
the locations of the muscle attachments
question
rectus femoris
answer
The quadriceps femoris is composed of three "vastus" muscles and the ________.
biceps femoris
semitendinosus
semimembranosus
rectus femoris
question
subscapularis; medial rotation
answer
Which rotator cuff muscle is correctly paired with its action?
infraspinatus; abduction
subscapularis; medial rotation
supraspinatus; lateral rotation
teres minor; adduction
question
mastoid process of the temporal bone
answer
The sternocleidomastoid muscle inserts on the ________.
clavicle
sternum
platysma
mastoid process of the temporal bone
question
the forearm
answer
Where are the origins of most of the muscles that move the fingers?
the palm of the hand
the wrist
the arm
the forearm
question
True
answer
t/f Most superficial thorax muscles are extrinsic shoulder muscles.
question
triceps brachii
answer
The main forearm extensor is the __________.
triceps brachii
coracobrachialis
biceps brachii
brachilais
question
buccinator
answer
A nursing infant develops a powerful sucking muscle that adults also use for whistling. What is this muscle called?
buccinator
platysma
zygomaticus
masseter
question
true
answer
t/f Muscles that help maintain upright posture are fixators.
question
popliteus
answer
Which of the following muscles does not act in plantar flexion?
popliteus
gastrocnemius and soleus
flexor digitorum longus
tibialis posterior
question
diaphragm
answer
The muscle that divides the ventral body cavity into the thoracic and abdominopelvic cavities is the __________.
psoas major
transversus abdominis
diaphragm
internal oblique
question
it closes, purses; and portrudes the orbicular oris
answer
Which of the following best describes the orbicularis oris?
It closes, purses, and protrudes the lips.
It pulls the lower lip down and back.
It closes the eye.
It draws the eyebrows together.
question
true
answer
t/f In order to propel food down to the esophagus, the pharyngeal constrictor muscles are used.
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