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A&P Muscles & Sliding Filament Theory

Total questions: 50

Worksheet time: 29mins

Name
Class
Date
1.

Actin is the ...

a)

Thick Filament within a Muscle Fibre

b)

Thin Filament within a Muscle Fibre

c)

Protein that covers myosin-binding sites

d)

Molecule that causes muscle contraction

2.

Myosin is the ...

a)

Thin Filament of a muscle fibre

b)

Segment of a muscle fibre

c)

A molecule that changes shape when bound with Calcium Ions

d)

Thick Filament of a muscle fibre

3.

True or False: Cross-bridges is when a myosin head attaches to an actin during contraction

a)

True

b)

False

4.

The Z Line provides attachment for the ...

a)

Troponin

b)

Myosin

c)

Actin

d)

ATP

5.

Myofibril is an arrangement of ___________ within a muscle fibre.

a)

Bands

b)

Sacromeres

c)

Proteins

d)

Crossbridges

6.

_________ carries the impulse deep into the myofibrils.

a)

T-Tubules

b)

Synapses

c)

Sarcoplasm

d)

Neurotransmitters

7.

True or False: Calcium Ions bind to Tropomyosin to change the shape of Troponin.

a)

True

b)

False

8.

What does the Myosin Heads release to relax and pull the Actin filament?

a)

ATP

b)

ADP

c)

CNS

d)

ETC

9.

What binds to the Myosin Head to cause it to detach from the Actin?

a)

ATP

b)

ADP

c)

CNS

d)

ETC

10.

What causes the muscle to stop contracting?

a)

Lack of effort

b)

Myosin-Heads fail to attach

c)

Calcium Ions are pumped away

d)

Muscle fibre tears

11.

What starts a muscle contraction?

a)

Release of Calcium Ions

b)

Attachment of Myosin-Heads

c)

An Action Potential

d)

Release of ADP

12.

Calcium:

a)

causes ATP binding to actin

b)

increases the action potential along the sarcolemma

c)

binds to myosin

d)

triggers troponin and tropomyosin to uncover the myosin binding sites on actin

13.

What is a crossbridge?

a)

Where myosin binds to actin

b)

Where the calcium crosses into the cytoplasm

c)

Where calcium binds with troponin

d)

None of the answers are correct.

14.

The neurotransmitter stored in the axon terminal identified as #3

a)

Calcium Ion (Ca2+)

b)

Protein Channel

c)

Acetylcholine

d)

Synaptic Cleft

15.
The gap between a neuron and a muscle cell: (#4 in the diagram)
a)
synaptic cleft
b)
sarcolemma
c)
vesicle
d)
Ca2+ ion
16.
The plasma membrane of a skeletal muscle cell is called the:
a)
sarcomere
b)
myofilament
c)
sarcolemma
d)
sarcoplasm
17.

The Ion that is responsible for removing Troponin from Tropomyosin.

a)
Sodium
b)
Calcium
c)
Potassium
d)
Magnesium
18.

the neuron that transmit impulse from central nervous system to muscle effector is called

a)

sensory neuron

b)

motor neuron

19.
Region where a motor neuron comes in close contact with a muscle cell.
a)
neurotransmitter
b)
muscular dystrophy
c)
muscle tension
d)
neuromuscular junction
20.
The organelle that stores ACh in the axon is identified as #4
a)
Motor Neuron
b)
Axon Terminal of Motor Neuron
c)
Sarcolemma
d)
 Vesicle
21.
The organelle containing actin and myosin identified as #9
a)
ACh
b)
Sarcolemma
c)
Vesicle
d)
Myofibril
22.
Skeletal Muscle contraction is initiated when the ________ sends a message to the muscle cell.  
a)
Muscle cell
b)
Neuron
c)
Gland
d)
None of the above
23.
___ and ___ are regulatory proteins bound to actin. 
a)
Troponin and tropomyosin
b)
Myosin and actin
c)
Calcium and Oxygen
d)
Glycogen and hemoglobin
24.
What state is the sarcomere in #1
a)
Relaxed
b)
Contracting
c)
Fully Contracted
d)
None of the above
25.
What state is the sarcomere in #2
a)
Relaxed
b)
Contracting
c)
Fully Contracted
d)
None of the above
26.

which skeletal muscle is represented in the image?

a)

brachioradialis

b)

biceps brachii

c)

biceps femoris

d)

deltoideus

27.

which skeletal muscle is represented in the image?

a)

external obliques

b)

serratus anterior

c)

rectus abdominis

d)

pectoralis major

28.

which skeletal muscle is represented in the image?

a)

gastrocnemius

b)

tibialis anterior

c)

fibularis longus

d)

vastus medialis

29.

which skeletal muscle is represented in the image?

a)

gluteus medius

b)

gluteus maximus

c)

semitendinosus

d)

external obliques

30.

which skeletal muscle is represented in the image?

a)

latissmus dorsi

b)

teres major

c)

infraspinatus

d)

deltoideus

31.

which skeletal muscle is represented in the image?

a)

pectoralis major

b)

serratus anterior

c)

rectus abdominis

d)

deltoideus

32.

which skeletal muscle is represented in the image?

a)

pectoralis major

b)

serratus anterior

c)

rectus abdominis

d)

deltoideus

33.

which skeletal muscle is represented in the image?

a)

rectus femoris

b)

vastus lateralis

c)

vastus medialis

d)

sartorius

34.

which skeletal muscle is represented in the image?

a)

sternocleidomastoid

b)

trapezius

c)

zygomaticus

d)

depressor anguli oris

35.

which skeletal muscle is represented in the image?

a)

sternocleidomastoid

b)

trapezius

c)

zygomaticus

d)

depressor anguli oris

36.

which skeletal muscle is represented in the image?

a)

triceps brachii

b)

latissimus dorsi

c)

deltoideus

d)

brachioradialis

37.

Which type of muscle is voluntary and striated?

a)

Cardiac

b)

Smooth

c)

Skeletal

38.

Which type of muscle is involuntary and striated?

a)

Cardiac

b)

Smooth

c)

Skeletal

39.

Which type of muscle is involuntary and non striated?

a)

Cardiac

b)

Smooth

c)

Skeletal

40.

What is the name of the connective tissue sheath that surrounds each muscle fiber?

a)

Endomysium

b)

Epimysium

c)

Perimysium

41.

Which membrane covers several fibers to form a fascicle?

a)

Endomysium

b)

Epimysium

c)

Perimysium

42.

What's the name of this muscle?

a)

Pectoral

b)

Deltoid

c)

Bicep

d)

Abdominal

43.

Name this muscle

a)

Gastrocnemius

b)

Quadricep

c)

Gluteus Maximus

d)

Hamstring

44.

Name the highlighted muscle

a)

quadraceps

b)

hamsting

c)

rectus abdominals

d)

deltoid

45.
a)
Buccinator
b)
Occuli
c)
Satorius
d)
Gastronecmius
46.
a)
Hamstring
b)
Quadriceps
c)
Bicep
d)
Satorius
47.

What is the muscle that allows you to close and protrude lips

a)

temporalis

b)

orbicularis oris

c)

orbicularis oculi

d)

buccinator

48.

Muscle that elevates the eyebrows

a)

occipitals

b)

frontalis

c)

temporalis

d)

corrugator

49.
A ______________________ attach bones to each other at joints.
a)
Ligament
b)
Bone
c)
Joint
d)
Cell
50.

The all-or-none principle of muscle contraction states what?

a)
Muscle contraction can be controlled and adjusted to different levels of intensity.
b)
Muscle fibers can contract independently of each other.
c)
When a muscle fiber is stimulated to contract, it will contract to its fullest extent or not at all.
d)
When a muscle fiber is stimulated to contract, it will contract partially.

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