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iliopsoas and rectus femoris |
Paralysis of which of the following would make an individual unable to flex the thigh? soleus biceps femoris iliopsoas and rectus femoris vastus medialis |
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the vastus lateralis |
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 |
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True |
T/F Deep muscles of the thorax promote movements for breathing. |
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True |
T/F The muscles of facial expression insert into skin or other muscles, not bones. |
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False |
T/F Although all skeletal muscles have different shapes, the fascicle arrangement of each muscle is exactly the same. |
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the frontal belly of the epicranius |
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 |
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transversus abdominis |
The ________ runs deep to the internal oblique. rectus abdominis latissimus dorsi external oblique transversus abdominis |
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a synergist |
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 |
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better-stabilized knee joint |
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 |
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hamstring muscles |
Paralysis of which of the following muscles would make an individual unable to flex the knee? gluteal muscles brachioradialis soleus hamstring muscles |
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adductor magnus |
Which of the following muscles is a flexor of the thigh? gluteus maximus vastus lateralis tibialis posterior adductor magnus |
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the diaphragm |
Which of the following muscles does the phrenic nerve innervate? the internal intercostals the external intercostals the diaphragm the sternocleidomastoid muscles |
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the scalenes |
Which group of muscles elevates the first two ribs and flexes and rotates the neck? the splenius the spinalis the scalenes the iliocostalis |
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the difference in positioning the effort, load, and fulcrum |
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 |
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False |
T/F Muscles that help to maintain posture are best described as synergists. |
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the gastrocnemius |
Which of the following muscles inserts to the posterior calcaneus via the calcaneal tendon? the semitendinosus the sartorius the gastrocnemius the tibialis anterior |
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antagonist |
muscle that opposes and reverses the action of another muscle |
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fixator |
muscle that stabilizes the origin of another muscle |
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agonist |
muscle that is primarily responsible for bringing about a particular movement |
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synergist |
muscle that aids another by promoting the same movement |
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True |
T/F The diaphragm flattens and moves inferiorly during inspiration. |
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antagonist |
A muscle that opposes, or reverses, a particular movement is a(n) ________. fixator antagonist agonist (prime mover) synergist |
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vastus intermedius |
Which of the following muscles is NOT a member of the hamstrings group? semimembranosus vastus intermedius biceps femoris semitendinosus |
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gracilis |
Which of the following is not a member of the hamstrings? semitendinosus semimembranosus gracilis biceps femoris |
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the total number of muscle fibers (cells) available for contraction |
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 |
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False |
T/F A pair of tweezers is a good example of a second-class lever. |
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rectus; straight |
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 |
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3rd choice |
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. |
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masseter |
The ________ is the main chewing muscle. masseter buccinator hyoglossus lateral pterygoid |
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True |
t/f The calcaneal tendon (Achilles tendon) is the largest tendon in the body. |
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antagonists |
Which functional group has the major responsibility for countering a specific movement? synergists antagonists fixators agonists |
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biceps brachii at the elbow; third-class lever |
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 |
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true |
t/f Muscle spasms of the back often are due to the erector spinae contraction. |
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the nervous systems control of the muscle |
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 |
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rectus femoris |
The quadriceps femoris is composed of three "vastus" muscles and the ________. biceps femoris semitendinosus semimembranosus rectus femoris |
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subscapularis; medial rotation |
Which rotator cuff muscle is correctly paired with its action? infraspinatus; abduction subscapularis; medial rotation supraspinatus; lateral rotation teres minor; adduction |
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mastoid process of the temporal bone |
The sternocleidomastoid muscle inserts on the ________. clavicle sternum platysma mastoid process of the temporal bone |
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the forearm |
Where are the origins of most of the muscles that move the fingers? the palm of the hand the wrist the arm the forearm |
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True |
t/f Most superficial thorax muscles are extrinsic shoulder muscles. |
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triceps brachii |
The main forearm extensor is the __________. triceps brachii coracobrachialis biceps brachii brachilais |
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buccinator |
A nursing infant develops a powerful sucking muscle that adults also use for whistling. What is this muscle called? buccinator platysma zygomaticus masseter |
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true |
t/f Muscles that help maintain upright posture are fixators. |
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popliteus |
Which of the following muscles does not act in plantar flexion? popliteus gastrocnemius and soleus flexor digitorum longus tibialis posterior |
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diaphragm |
The muscle that divides the ventral body cavity into the thoracic and abdominopelvic cavities is the __________. psoas major transversus abdominis diaphragm internal oblique |
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it closes, purses; and portrudes the orbicular oris |
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. |
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true |
t/f In order to propel food down to the esophagus, the pharyngeal constrictor muscles are used. |
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