Multiple Choice Identify the
choice that best completes the statement or answers the question.
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1.
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Which of the following muscles is described as
striated and involuntary?
a. | Aponeurosis | b. | Smooth | c. | Skeletal | d. | Cardiac |
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2.
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Actin is
a. | located within the neuromuscular
junction. | b. | a contractile protein that is called a thin
filament. | c. | called the
thick filament. | d. | stored within the
sarcoplasmic reticulum. |
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3.
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“Pumping iron” is most likely to
cause
a. | atrophy. | b. | contracture formation. | c. | hypertrophy. | d. | muscular
dystrophy. |
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4.
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The orbicularis oris muscle
a. | surrounds the mouth. | b. | flexes the head. | c. | is the smiling
muscle. | d. | closes the eye. |
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5.
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The biceps femoris, semitendinosus, and
semimembranosus
a. | flex the foot. | b. | attach to the patella. | c. | are the
hamstrings. | d. | are located on the
anterior thigh. |
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6.
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The rectus femoris, vastus lateralis, vastus
medialis, and vastus intermedius
a. | insert on the calcaneus. | b. | flex the leg at the knee. | c. | are antagonistic to the quadriceps femoris. | d. | are the muscles of the quadriceps
femoris. |
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7.
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Which flat muscle covers the forehead and raises
the eyebrows (for a “surprised” look)?
a. | Frontalis | b. | Zygomaticus | c. | Masseter | d. | Buccinator |
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8.
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Which muscles are located between the ribs and help
move the rib cage during breathing?
a. | Diaphragm | b. | Sternocleidomastoid | c. | Serratus
anterior | d. | Intercostal
muscles |
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9.
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The brachialis and brachioradialis
a. | flex the forearm at the
elbow. | b. | extend the hand. | c. | are antagonistic to the biceps brachii. | d. | shrug the shoulders. |
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10.
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Which muscle attaches to the cranial aponeurosis
and wrinkles the forehead?
a. | Frontalis | b. | Buccinator | c. | Orbicularis
oculi | d. | Platysma |
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11.
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“Make like a scarecrow” by contracting
which muscle?
a. | Frontalis | b. | Trapezius | c. | Latissimus
dorsi | d. | Deltoid |
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12.
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Which muscle lies along the anterior surface of the
humerus and acts synergistically with the brachialis and brachioradialis to flex the forearm at the
elbow?
a. | Deltoid | b. | Triceps brachii | c. | Biceps
brachii | d. | Latissimus dorsi |
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13.
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Which of the following is a series of contractile
units that make up each myofibril (each unit extends from Z line to Z line)?
a. | Sarcomeres | b. | Synapses | c. | Fascicles | d. | Sarcoplasmic
reticulum |
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14.
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Which structure is an extension of the sarcolemma
or cell membrane, which penetrates the interior of the muscle and carries the electrical signal to
the deepest part of the muscle?
a. | Sarcoplasmic reticulum | b. | T tubule | c. | Z
line | d. | Tendon |
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15.
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Which of the following is responsible for muscle
relaxation?
a. | The sarcomere runs out of
ATP. | b. | Calcium floods the area of the sarcomere, allowing for
the interaction of actin and myosin. | c. | Calcium is pumped
back into the sarcoplasmic reticulum. | d. | Acetylcholinesterase in the neuromuscular junction is
depleted. |
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16.
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Joey has had his leg in a non–weight-bearing
cast for 8 weeks. When the cast is removed, the leg appears smaller than the uninjured leg. Which
term best describes this observation?
a. | Contracture | b. | Hypertrophy | c. | Muscle
dystrophy | d. | Disuse atrophy |
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17.
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Which muscle covers the shoulder like a shoulder
pad?
a. | Deltoid | b. | Trapezius | c. | Biceps
brachii | d. | Sternocleidomastoid |
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18.
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Which muscle separates the thoracic and abdominal
cavities and is also the chief breathing muscle?
a. | Serratus anterior | b. | Intercostal muscle | c. | Sternocleidomastoid | d. | Diaphragm |
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19.
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Which muscles are located on the inner (medial)
surface of the thigh and move the thigh toward the midline of the body?
a. | Gastrocnemius | b. | Quadriceps femoris | c. | Adductors | d. | Sartorius |
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20.
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The Achilles tendon attaches the soleus and which
muscle to the calcaneus?
a. | Sartorius | b. | Quadriceps femoris | c. | Gastrocnemius | d. | Vastus
lateralis |
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21.
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With regard to skeletal muscle contraction, which
event comes last?
a. | Shortening of the sarcomere | b. | Release of calcium from the sarcoplasmic reticulum | c. | Activation of the NM receptors by ACh | d. | Release of neurotransmitter (ACh) from the somatic motor
neuron |
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22.
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Which group is incorrect?
a. | Dysfunction at the neuromuscular junction: botulism,
myasthenia gravis | b. | Contractile
proteins: thin filaments, myosin, aponeurosis | c. | Terms that
describe the muscle activity of a whole muscle: twitch and tetany | d. | Movements: flexion, supination,
abduction |
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23.
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Which type of muscle requires stimulation by a
somatic motor neuron?
a. | Visceral | b. | Smooth | c. | Cardiac
| d. | Skeletal |
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24.
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Which of the following “slides” in the
sliding filament hypothesis?
a. | Calcium and ATP | b. | Sarcoplasm and T tubules | c. | Actin and
myosin | d. | Epimysium and
perimysium |
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25.
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Which of the following causes the force that
generates cross-bridges?
a. | Binding of the acetylcholine to the NM
receptor in the neuromuscular junction | b. | The interaction of
acetylcholine and cholinesterase | c. | The rotation of
the myosin head on the actin | d. | The pumping of
calcium into the sarcoplasmic reticulum |
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26.
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Which of the following is most related to actin and
myosin?
a. | Considered contractile
proteins | b. | Form force-generating
cross-bridges | c. | Sliding
filaments | d. | All of the above |
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27.
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Muscle relaxation
a. | is a response to the binding of ACh to the
receptor. | b. | occurs when calcium is pumped back into the sarcoplasmic
reticulum. | c. | is a response to
the inactivation of acetylcholinesterase by ACh. | d. | occurs when the tendons lengthen. |
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28.
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The somatic motor nerve that supplies the muscles
of the thigh has been severed; therefore, the person
a. | will be able to walk only if he or she receives IV
calcium. | b. | cannot walk. | c. | can walk but has no feeling in the lower
extremities. | d. | can stand but
cannot walk. |
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29.
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The biceps brachii, brachioradialis, and brachialis
muscles
a. | have their origin on the
scapula. | b. | act synergistically with the triceps
brachii. | c. | extend the forearm. | d. | flex the forearm at the elbow. |
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30.
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Where are the pronators and supinators
located?
a. | Thigh | b. | Abdomen | c. | Lower
back | d. | Upper extremities |
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