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Chapter 9: The Muscular System

Total questions: 76

Worksheet time: 42mins

Name
Class
Date
1.
Functions of muscles are for 
a)
the heartbeat
b)
muscle tone
c)
distribution of heat
d)
moving bones
e)
all of the above
2.
The outermost layer of connective tissue surrounding a skeletal muscle is the 
a)
epimysium
b)
perimysium
c)
endomysium
d)
sarcomysium
e)
myomysium
3.
Myofibrils are composed primarily of 
a)
actin and myosin
b)
ATP and ADP
c)
troponin and tropomyosin
d)
fascia and tendons
e)
perimysium and endomysium
4.
Transverse tubules 
a)
store sodium ions for the action potential at the cell surface
b)
transmit muscle impulses into the cell interior
c)
store calcium ions
d)
connect actin and myosin
e)
transmit nerve impulses out of the muscle
5.
Muscle fibers are basically a collection of
a)
muscles
b)
sarcomeres
c)
connective tissue fibers
d)
alpha and beta subunits
e)
synapses
6.
A tendon is ______, whereas an aponeurosis is ______. 
a)
cordlike and connects bones to bones; a broad, fibrous sheet of connective tissue that connects muscles to muscles
b)
a broad, fibrous sheet of connective tissue that connects muscles to muscles; cordlike and connects bones to bones
c)
cordlike and connects muscles to bones; a broad, fibrous sheet of connective tissue that connects muscles to muscles
d)
found in humans; found in apes.
7.
Transverse tubules and sarcoplasmic reticulum are well developed in
a)
smooth muscle fibers
b)
skeletal muscle fibers
c)
cardiac muscle fibers
d)
motor neurons
e)
nervous muscle fibers
8.
The functional unit of muscle contraction is 
a)
the muscle
b)
the muscle fiber
c)
the myosin cross-bridge
d)
the sarcomere
e)
the myomere
9.
Neurotransmitters are stored in vesicles in 
a)
myofibrils
b)
motor units
c)
motor end plates
d)
motor neurons
e)
sarcomeres
10.
The enzyme acetylecholinesterase causes acetylcholine to 
a)
bond to actin
b)
be secreted from the motor end plate
c)
decompose
d)
form cross-bridges
e)
none of the above
11.
The amount of oxygen liver cells require to react lactic acid to produce glucose or the glycogen glycogen is the 
a)
refractory quantity
b)
oxygen debt
c)
anaerobic concentrations
d)
aerobic conversion
e)
lactate debt
12.
Tawanda finishes a sprint and suffers great pain in her calf muscles. Her muscle cramps are most likely due to a temporary deficit of 
a)
actin
b)
myosin
c)
ATP
d)
ADP
e)
endorphins
13.
Athletes usually experience muscle fatigue less quickly than nonathletes because they 
a)
convert glucose to lactic acid
b)
tolerate high concentrations of carbon dioxide
c)
make more efficient use of ATP
d)
produce less lactic acid
e)
do not care about fatigue or pain.
14.
At a neuromuscular junction, the muscle fiber membrane folds, forming a 
a)
motor neuron
b)
neurotransmitter
c)
motor unit
d)
motor end cup
e)
motor end plate
15.
at a neuromuscular junction
a)
actin and myosin filaments slide past one another.
b)
troponin and tropomyosin exchange places.
c)
neurotransmitters are released
d)
intercalated discs are synthesized
e)
neurotransmitters are synthesized
16.
the first event in muscle fiber contaction is that
a)
the muscle fiber membrane is stimulated and a muscle impulse travels deep into the fiber through transverse tubules
b)
acetylcholine diffuses across a gap at a neuromuscular junction
c)
acetylcholine is released from the end of the motor neuron
d)
. calcium ions diffuse from sarcoplasmic reticulum into the sarcoplasm and bind to troponin molecules
e)
morphine is released from the end of the motor neuron
17.
Which of the following statements is correct? 
a)
Tropomyosin molecules move and expose specific sites on myosin filaments.
b)
Actin filaments slide along myosin filaments
c)
Cross-bridges form between actin and sarcolemma filaments
d)
Filaments of troponin and tropomyosin slide past one another
e)
Myosin and actin alternate to form filaments
18.
The functional connection between a neuron and a skeletal muscle fiber is a 
a)
myoma
b)
fascia
c)
neuroma
d)
dendrite
e)
synapse
19.
__________ degrades acetylcholine, keeping it from accumulating in the synapse. 
a)
ATPase
b)
Myosinase
c)
Actinase
d)
Acetylcholinesterase
e)
Dnase
20.
The relationship between ATP and creatine phosphate is that 
a)
ATP supplies energy to synthesize creatine phosphate from creatine and phosphate.
b)
creatine phosphate supplies energy to regenerate ATP from ADP and phosphate
c)
both having three phosphate groups.
d)
both are required to stimulate a muscle to contract
e)
they are the same.
21.
A motor unit
a)
many myofibrils in a sarcolemma
b)
many motor end plates at a neuromuscular junction
c)
a motor neuron and the muscle fibers connected to it
d)
the functional unit of a muscule fiber
e)
a type of recreational vehicle
22.
In muscle contraction ATP supplies energy for 
a)
creatine phosphate synthesis.
b)
glycogen synthesis.
c)
cellular respiration.
d)
enzyme activity.
e)
myofilament movement.
23.
Threshold stimulus is the 
a)
maximum stimulus to contract a muscle.
b)
amount of acetylcholine required to contract a muscle.
c)
maximum stimulus required to contract a muscle.
d)
minimal amount of energy required to contract a muscle fiber.
e)
none of the above.
24.
In a recording of a muscle twitch, the delay between the time a stimulus is applied and the time the muscle responds is called the 
a)
refractory period
b)
relaxation period
c)
latent period
d)
contraction period
e)
stimulus period
25.
The movable end of a muscle is its
a)
origin
b)
fulcrum
c)
insertion
d)
twitch
e)
source
26.
The muscle primarily responsible for an action is the 
a)
biceps
b)
antagonist
c)
origin
d)
prime mover
e)
activator
27.
The buccinator muscle is in the
a)
buttocks
b)
ankle
c)
bladder
d)
cheek
e)
chest
28.
The soleus is a muscle that forms part of the
a)
calf
b)
buttocks
c)
thigh
d)
abdomen
e)
shoulder
29.
Endomysium separates individual muscle fibers
a)
true
b)
false
30.
Layers of dense connective tissue that separate skeletal muscles from each other are called fascia.
a)
true
b)
false
31.
A motor neuron and the muscle fibers that it controls constitute a motor unit.
a)
true
b)
false
32.
During muscle contraction, calcium ions combine with tropomyosin, and this exposes active sites for cross-bridge formation. 
a)
true
b)
false
33.
ATPase is located in myosin cross-bridges
a)
true
b)
false
34.
Anaerobic respiration occurs primarily in mitochondria. 
a)
true
b)
false
35.
Liver cells convert lactic acid to ATP. 
a)
true
b)
false
36.
The minimal strength of stimulation needed to elicit a muscle contraction is called the threshold stimulus.
a)
true
b)
false
37.
If a muscle contracts and its fibers shorten, the contraction is isometric
a)
true
b)
false
38.
The latent period is the time when the muscle is relaxed. 
a)
true
b)
false
39.
a is pointing to
a)
deltoid
b)
trapezius
c)
biceps brachii
d)
triceps brachii
40.
c is pointing to
a)
external oblique
b)
rectus abdominus
c)
transverse abdominus
d)
internal oblique
41.
d is pointing to
a)
quadriceps
b)
hamstrings
c)
gastrocnemius
d)
gluteus maximus
42.
e is pointing to
a)
pectoralis major
b)
pectoralis minor
c)
rectus abdominus
d)
deltoid
43.
h is pointing to
a)
deltoid
b)
trapezius
c)
latissimus dorsi
d)
triceps brachii
44.
j is pointing to
a)
deltoid
b)
latissimus dorsi
c)
trapezius
d)
triceps brachii
45.
L is pointing to
a)
quadriceps
b)
hamstrings
c)
gastrocnemius
d)
gluteus maximus
46.
m is pointing to
a)
quadriceps
b)
hamstrings
c)
gastrocnemius
d)
gluteus maximus
47.

Identify the muscle labeled 1

a)

temporalis

b)

occipitalis

c)

frontalis

d)

masseter

48.

Identify the muscle labeled 2

a)

orbicularis oculi

b)

orbicularis oris

c)

zygomaticus

d)

masseter

49.

Identify the muscle labeled 4

a)

orbicularis oris

b)

orbicularis oculi

c)

trapezius

d)

masseter

50.

Identify the muscle labeled 14

a)

frontalis

b)

occipitalis

c)

temporalis

d)

sternocleidomastoid

51.

Identify the muscle labeled 15

a)

masseter

b)

trapezius

c)

zygomaticus

d)

temporalis

52.

Identify the muscle labeled 16

a)

sternocleidomastoid

b)

trapezius

c)

deltoid

d)

masseter

53.

Identify the muscle labeled 5

a)

pectoralis major

b)

deltoid

c)

pectoralis minor

d)

trapezius

54.

Identify the muscle labeled 6

a)

deltoid

b)

pectoralis major

c)

pectoralis minor

d)

trapezius

55.

Identify the muscle labeled 7

a)

bicpes brachii

b)

triceps brachii

c)

deltoid

d)

pectoralis minor

56.

Identify the muscle labeled 8

a)

rectus abdominus

b)

rectus femoris

c)

external oblique

d)

transverse abdominus

57.

Identify the muscle labeled 9

a)

external oblique

b)

internal oblique

c)

rectus abdominus

d)

transverse abdominus

58.

Identify the muscles labeled 10

a)

adductors

b)

abductors

c)

sartoius

d)

rectus femoris

59.

Identify the muscle labeled 11

a)

gracilis

b)

sartorius

c)

rectus femoris

d)

vastus lateralis

60.

Identify the muscle labeled 12

a)

sartorius

b)

gracilis

c)

adductors

d)

vastus medialis

61.

Identify the muscle labeled 18

a)

rectus femoris

b)

vastus lateralis

c)

vastus medialis

d)

biceps femoris

62.

Identify the muscle labeled 19

a)

vastus lateralis

b)

vastus medialis

c)

rectus femoris

d)

biceps femoris

63.

Identify the muscle labeled 20

a)

vastus medialis

b)

vastus lateralis

c)

rectus femoris

d)

biceps femoris

64.

Identify the muscle labeled 13

a)

tibialis anterior

b)

tibialis posterior

c)

fibularis

d)

gastrocnemius

65.

Identify the muscle labeled 21

a)

fibularis

b)

tibialis anterior

c)

tibialis posterior

d)

gastrocnemius

66.

Identify the muscle labeled 6

a)

trapezius

b)

deltoid

c)

latissimus dorsi

d)

occipitalis

67.

Identify the muscle labeled 7

a)

deltoid

b)

trapezius

c)

triceps

d)

biceps

68.

Identify the muscle labeled 9

a)

Latissimus dorsi

b)

triceps brachii

c)

triceps femoris

d)

biceps brachii

69.

Identify the muscle labeled 9

a)

latissimus dorsi

b)

external oblique

c)

internal oblique

d)

gluteus maximus

70.

Identify the muscle labeled 10

a)

external oblique

b)

internal oblique

c)

gluteus maximus

d)

latissimus dorsi

71.

Identify the muscle labeled 11

a)

gluteus medius

b)

gluteus maximus

c)

external oblique

d)

internal oblique

72.

Identify the muscle labeled 1

a)

gluteus maximus

b)

gluteus medius

c)

external oblique

d)

biceps femoris

73.

Identify the muscle labeled 3

a)

biceps femoris

b)

biceps brachii

c)

vastus lateralis

d)

gastrocnemius

74.

Identify the muscle labeled 4

a)

semitendinosus

b)

biceps femoris

c)

vastus lateralis

d)

gastrocnemius

75.

Identify the muscle labeled 5

a)

gastrocnemius

b)

fibularis

c)

tibialis anterior

d)

soleus

76.

Identify the muscle labeled 12

a)

soleus

b)

gastrocnemius

c)

fibularis

d)

tibialis anterior

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