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Muscular System review

Total questions: 34

Worksheet time: 19mins

Name
Class
Date
1.

What is the contractile unit of skeletal muscle?

a)

Myofibril

b)

Sarcomere

c)

Sarcolemma

d)

Fasicle

2.
Each muscle fiber is directly surrounded by connective tissue called the 
a)
perimysium
b)
fascia
c)
endomysium
d)
epimysium
3.
This large, flat muscle inserts along the mandible and pulls your lip down as in pouting
a)
Buccinator
b)
Platysma
c)
Medial Pterygoid
d)
Lateral Pterygoid
4.
What muscle allows you to smile?
a)
Triangularis
b)
Orbicularis oris
c)
Quadratus labii superioris
d)
Zygomaticus
5.

What muscle allows you to raise your eyebrows?

a)

orbicularis oculi

b)

epicranius

c)

temporalis

d)

orbicularis oris

6.
What muscle allows you to kiss?
a)
orbicularis oris
b)
orbicularis oculi
c)
buccinator
d)
triangularis
7.
What muscle allows you to wink or squint?
a)
orbicularis oris
b)
frontalis
c)
orbicularis oculi
d)
triangularis
8.
a neurotransmitter that stimulates skeletal muscles
a)
acetylcholine (Ach)
b)
ATP
c)
cross bridges
d)
neuromuscular junction
9.
the heads of the myosin myofilaments are called __ when they link the thick and the thin filament together 
a)
acetylcholine (Ach)
b)
ATP
c)
cross bridges
d)
neuromuscular junction
10.
what is the function of Calcium during a skeletal muscle contraction?
a)
connecting to H zone
b)
connecting to troponin
c)
connecting to myofibril
d)
connecting to myosin
11.

The entire muscle is encased by connective tissue called the

a)

sacromere

b)

sarcoplasm

c)

myosin

d)

epimysium

12.

The _______________ covers bundles of cells (fascicles) within the muscle.

a)

endomysium

b)

perimysium

c)

sarcoplasm

d)

tendon

13.

Structure C is known as the thick filament of the sarcomere, it is also known as

a)

myosin

b)

actin

c)

fascia

d)

myofibrils

14.

Structure B is known as the thin filaments of the sarcomere, what is another name for the thin filaments?

a)

myosin

b)

actin

c)

fascia

d)

myofibril

15.

Which of the following occur when ATP binds to the myosin head?

a)

Myosin head change to low energy configuration

b)

Myosin head undergoes power stroke

c)

Myosin head detach from actin

d)

Myosin head forms cross bridge

16.

Ca2+ will be released from the sarcoplasmic reticulum when

a)

impulse reaches neuromuscular junction

b)

impulse transmitted along T tubule

c)

ATP binds to sarcoplasmic reticulum

d)

acetyl choline binds to ligand gated ion channels

17.

Ca2+ released by sarcoplasmic reticulum will bind to

a)

Actin

b)

Troponin

c)

Myosin

d)

Tropomyosin

18.
point where an axon terminals of a nerve cell and the sarcolemma of a skeletal muscle join
a)
acetylcholine (Ach)
b)
ATP
c)
cross bridges
d)
neuromuscular junction
19.
specialized smooth endoplasmic reticulum that surrounds each myofibril, it stores calcium and releases on demand
a)
sarcolemma
b)
sarcoplasmic reticulum
c)
thick filament
d)
thin filament
20.

The pause between stimulus and muscle contraction is called the______________________.

a)

myogram

b)

twitch

c)

all or none response

d)

latent period

21.
This type of muscle tissue is found only in the heart
a)
Skeletal
b)
Cardiac
c)
Smooth
22.
This type of muscle tissue is found in the walls of hollow organs such as the stomach 
a)
Skeletal
b)
Cardiac
c)
Smooth
23.
This type of muscle tissue is attached to bones wand helps control voluntary movement
a)
Skeletal
b)
Cardiac
c)
Smooth
24.
Which types of muscle tissue are voluntary
a)
Cardiac Muscle
b)
Smooth Muscle
c)
Skeletal Muscle
d)
Skeletal Muscle and Smooth Muscle
25.

What is the group of muscles found ANTERIOR of the thigh?

a)

Hamstrings

b)

Gastrocnemius

c)

Quadriceps

d)

Epicranius

26.
Which is more true to cause muscle contraction?
a)
Actin Pulls on the myosin
b)
Myosin Pulls on the Titin
c)
Myosin Pulls on Actin
d)
Actin Pulls on Titin
27.
Which ion, when present, changes the conformation of tropomyosin?
a)
Calcium
b)
Sodium
c)
Potassium
d)
Lithium
28.
What opens the ligand gated sodium/potassium channel?
a)
Calcium Ion Binding to the channel protein.
b)
Acetylcholine binding to the channel protein.
c)
Electrical Signal opening the channel protein.
d)
Acetylcholinesterase binding to the channel protein.
29.
Calcium that will eventually enter the muscle cell to bind with troponin is stored in the...
a)
T-Tubule of the Muscle Cell
b)
Sarcoplasmic Reticulum of the Muscle Cell
c)
The Sarcolemma of the Muscle Cell
d)
The interstitial space outside the muscle cell near the pre-synaptic terminal.
30.
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
31.
a bundle of muscle fibers
a)
actin
b)
mysoin
c)
fascicle
d)
sarcomere
32.
covers the actin and prevents the myosin head to attach to the actin (rope or strand shape). 
a)
tropomyosin
b)
Myosin and actin
c)
Calcium and Oxygen
d)
Glycogen and hemoglobin
33.

Skeletal muscle fibers normally do not contract partially, if it contracts at all it contracts completely

a)

myogram

b)

twitch

c)

all or none response

d)

latent period

34.

____________ attaches to actin to form the cross bridge.

a)

Troponin

b)

Tropomyosin

c)

Myosin

d)

Calcium

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