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Sliding Filament Theory

Total questions: 30

Worksheet time: 18mins

Name
Class
Date
1.

Muscles are attached to bones by _____.

a)

Ligaments

b)

Tendons

c)

Cartilage

d)

Axons

2.

Contractile unit of a muscle.

a)

sarcomere

b)

motor unit

c)

fascicle

d)

myofibril

3.

Thick filaments are in a myofibril are

a)

ATPase

b)

Sarcoplasmic reticulum

c)

Actin

d)

Myosin

4.

Thin filaments in a myofibril are

a)

Sarcomeres

b)

Sarcoplasm

c)

Actin

d)

Myosin

5.

Calcium:

a)

causes ATP binding to actin

b)

increases the action potential along the sarcolemma

c)

binds to proteins on myosin

d)

triggers the binding of myosin to actin

6.

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.

7.

The energy needed to perform a muscle contraction comes directly from

a)

ATP

b)

Oxygen

c)

Glucose

d)

Calcium

8.

Calcium binds to ___of the troponin-tropomyosin complex.

a)

troponin

b)

tropomyosin

c)

actin

d)

myosin

9.

The neurotransmitter stored in the axon terminal identified as #3

a)

Calcium Ion (Ca2+)

b)

Protein Channel

c)

Acetylcholine

d)

Synaptic Cleft

10.

What is the structure that stores the Calcium in the muscle cell.

a)

Sarcoplasm

b)

Sarcolemma

c)

Myoglobin

d)

Sarcoplasmic Reticulum

11.

Which is voluntary?

a)

cardiac

b)

skeletal

c)

smooth

12.

Place the following events in sequence:

A) Your arm moves

B) An impulse travels along a nerve

C) You decide you want to move your arm.

a)

A B C

b)

C B A

c)

C A B

d)

A C B

13.

Which filament slides inward during muscle contraction

a)

Actin

b)

Myosin

14.

What layer of connective tissue covers the muscle fiber?

a)

endomysium

b)

epimysium

c)

perimysium

15.

What layer of tissue surrounds the entire muscle?

a)

Endomysium

b)

Epimysium

c)

Perimysium

16.

Which of the following best describes the power stoke?

a)

actin's troponin pulls on the myosin filament

b)

myosin heads pull on binding sites of the actin filament

17.

Which one shows the correct order of muscle organization?

a)

muscle, muscle fiber, myofibril, fascicle

b)

fascicle, muscle fiber, muscle, myofibril

c)

muscle, fascicle, muscle fiber, myofibril

d)

myofibril, muscle, muscle fiber, fascicle

18.

Which level of muscle organization would represent the cell?

a)

muscle

b)

fascicle

c)

muscle fiber

d)

myofibril

19.

A ___extends from one Z disc to another Z disc.

a)

Sarcolemma

b)

Neuromuscular junction

c)

Sarcomere

d)

Motor end plate

20.
The gap between a neuron and a muscle cell: (#4 in the diagram)
a)
synaptic cleft
b)
sarcolemma
c)
vesicle
d)
Ca2+ ion
21.
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
22.

The specialized part of the cell membrane of the muscle fiber identified as #5

a)

Sodium ion (Na+)

b)

Axon Terminal of Motor Neuron

c)

motor end plate

d)

Vesicle

23.
The organelle containing actin and myosin identified as #9
a)
ACh
b)
Sarcolemma
c)
Vesicle
d)
Myofibril
24.
This is a neurotransmitter used to create a muscle impulse
a)
Acetylcholine
b)
Calcium Ions (Ca2+)
c)
Sodium Ions (Na+)
d)
Protein Channels
25.
Another name for a muscle cell.
a)
Fiber
b)
Sacrolemma
c)
Sacromere
d)
Fascicle
26.
The plasma membrane of a skeletal muscle cell is called the:
a)
sarcomere
b)
myofilament
c)
sarcolemma
d)
sarcoplasm
27.
What two chemicals are necessary for muscle contraction to occur?
a)
Niacin and Potassium
b)
Calcium and ATP
c)
Sodium and Potassium
d)
Ach and Potassium
28.
A muscle contraction that does not appear to relax and is sustained by continuous stimulation.
a)
Unfused Tetanus
b)
Fused Tetanus
c)
Twitch
29.
Region where a motor neuron comes in close contact with a muscle cell.
a)
neurotransmitter
b)
muscular dystrophy
c)
muscle tension
d)
neuromuscular junction
30.
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

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