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WorksheetsMuscular System
Total questions: 22
Worksheet time: 11mins
Name
Class
Date
1.
The outermost layer of connective tissue of a
muscle is the:
muscle is the:
a)
fascicle.
b)
epimysium.
c)
endomysium.
d)
perimysium.
2.
The thick myofibril filament of a sarcomere is
composed of a protein:
composed of a protein:
a)
actin.
b)
myosin.
c)
sarcolemma.
d)
titin.
3.
The muscle primarily responsible for a movement
is the:
is the:
a)
prime mover (agonist).
b)
synergist.
c)
antagonist.
d)
origin.
4.
The neuron and the collection of muscle fibers it innervates is called the:
a)
neural impulse.
b)
motor neuron.
c)
muscle fiber.
d)
motor unit.
5.
The functional contractile unit within muscle fiber is the:
a)
sarcoplasm.
b)
sarcolemma.
c)
sarcomere.
d)
sarcoplasmic reticulum.
6.
The functional contractile unit within muscle fiber is the:
a)
actin.
b)
nucleus.
c)
mitochondrion.
d)
sarcomere.
7.
According to the sliding filament model, muscle
contraction begins when:
contraction begins when:
a)
calcium ion concentration increases exposing binding sites.
b)
myosin heads pull on actin filaments.
c)
ATP splits to form ADP and P.
d)
myosin heads release the actin filaments
8.
Cardiac muscle
a)
contracts as a syncytium.
b)
excites itself.
c)
is only in the heart.
d)
all of these
9.
Oxygen debt in muscles may develop because of:
a)
the inability of respiratory and circulatory systems to supply enough oxygen to skeletal muscles when used strenuously for a minute or two.
b)
the inability of myoglobin molecules to store enough oxygen when skeletal muscles are used strenuously for a minute or two.
c)
too much oxygen used in forming pyruvic acid when skeletal muscles are contracted strenuously for a minute or two.
d)
too high a concentration of oxygen in the atmosphere.
10.
A weightlifter uses muscles so the muscles exert more than 75% of their maximum tension, this stimulates:
a)
an increase in slow, fatigable white fibers.
b)
muscle fibers developing new filaments of actin and myosin.
c)
shrinking of skeletal muscle.
d)
conversion of skeletal to smooth muscle.
11.
Muscles of mastication are all inserted on the:
a)
mandible.
b)
tongue.
c)
maxilla.
d)
teeth.
12.
Facial expressions are so variable partly because many facial muscles are inserted:
a)
on the mandible.
b)
on the maxilla.
c)
on facial bones.
d)
in the skin.
13.
Which of the following muscles does not move the hyoid bone?
a)
sternohyoid
b)
mylohyoid
c)
sternocleidomastoid
d)
thyrohyoid
14.
Chest and shoulder muscles that move the arm at the shoulder joint have insertions on the:
a)
humerus.
b)
scapula.
c)
clavicle and ribs.
d)
radius or ulna.
15.
Muscles located in the arm that move the forearm at the elbow joint have insertions on the:
a)
scapula and clavicle.
b)
radius or ulna.
c)
humerus.
d)
carpals, metacarpals, and phalanges.
16.
Rotator cuff muscles all have origins on the:
a)
humerus.
b)
clavicle.
c)
clavicle.
d)
scapula.
17.
The belly of the flexor digitorum profundus muscle is located in the:
a)
anterior deep region of the forearm.
b)
posterior superficial region of the forearm.
c)
anterior superficial region of the forearm.
d)
posterior superficial region of the arm.
18.
Muscles that move the thigh at the hip joint have origins on the:
a)
pelvis.
b)
tibia.
c)
femur.
d)
patella.
19.
Anterior thigh muscles serve as prime movers of:
a)
flexion of the leg at the knee joint.
b)
abduction of the thigh at the hip joint.
c)
extension of the leg at the knee joint.
d)
adduction of the thigh at the hip joint.
20.
The muscles of the lower limb _______________
than those of the upper limb.
than those of the upper limb.
a)
are more numerous
b)
conduct actions with more precision
c)
are larger
d)
are less powerful
21.
Which of the following muscles is not part of the quadriceps group?
a)
semitendinosus
b)
rectus femoris
c)
vastus lateralis
d)
vastus medialis
22.
Which of the following muscles is not part of the hamstring group?
a)
semitendinosus
b)
biceps femoris
c)
semimembranosus
d)
rectus femoris
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