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Worksheets

Muscular System

Total questions: 43

Worksheet time: 22mins

Name
Class
Date
1.

The lifting of a weight is an example of a (an) _________ contraction

a)

isometric

b)

tonus

c)

isotonic

d)

twitch

2.

A muscle action whereby the palms are turned upward is

a)

pronation

b)

supination

c)

rotation

d)

elevatin

3.

One of the proteins that form the thin myofilament of muslce fiber is _____; the protein of the thick myofilament is _____

a)

troponin; tropmyosin

b)

titin; nebulin

c)

myosin; actin

d)

actin; myosin

4.

When a muscle cell is at rest, which type of ions are highly concentrated in the fluids that surround it?

a)

phosphate

b)

sodium

c)

potassium

d)

hydrogen

5.

What happens in the sarcoplasmic reticulum as a result of the chemical changes caused by the arrival of acetylcholine at the sarcolema?

a)

calcium ions are released

b)

ion channels open in the sarcolema

c)

calcium ions are removed from the sarcolema

d)

the sarcolema contracts

6.

what is the neurotransmitter for muscle contraction?

a)

norepinephrine

b)

troponin

c)

actin

d)

acetycholine

7.

A backup energy source for muscle contraction is

a)

ATP

b)

myoglobin

c)

creatine phosphate

d)

oxygen

8.

When a person performs strength enhancing exercises, the skeletal muscles get larger as a result of

a)

the conversion of actin to myosin

b)

atrophy

c)

hypertrophy

d)

an increase in te number of skeletal muscle cells

9.

What is the contractile unit of muscle?

a)

myofilaments

b)

epimysium

c)

sarcomere

d)

z line

10.

Muscle originates from

a)

ectoderm

b)

myoderm

c)

mesoderm

d)

endoderm

11.

The head of the myosin molecule binds to

a)

tropomyosin

b)

thick filaments

c)

thin filaments

d)

membranes

12.

all of the following factors can cause skeletal muscle atrophy except

a)

increased intake of vitamin D

b)

decreased insulin like growth factor

c)

loss of nerve supply to the muscle

d)

increased concentration of aromatase

13.

the muscle action that decreases the angle of a joint is called

a)

rotator

b)

extensor

c)

abductor

d)

flexor

14.

In flexion of the arm at the elbow, the ____ muscle contracts, and the ___ acts as an anatgonist

a)

semitendinous; biceps

b)

biceps; triceps

c)

quadriceps; biceps

d)

triceps; biceps

15.

Which term describes the stable or immovable attachment point for a muscle?

a)

tendonous portion

b)

insertion

c)

flexion point

d)

origin

16.

Which of the following best explains the striations in a striated muscle?

a)

striations are a form of gross anatomy; their cause is under investigation

b)

patterns of cytoskeleton proteins make the striations

c)

striations are marks that appear in muscles that have contracted

d)

regularly arranged nuclei cause the striations

17.

A group of muscles that increase the angle of a joint

a)

tensor

b)

abductor

c)

rotator

d)

extensor

18.

a group of muscles that move a bone in a circular direction

a)

tensor

b)

abductor

c)

rotator

d)

extensor

19.

a group of muscles that turn the palm upward

a)

extensor

b)

adductor

c)

supinator

d)

sphincter

20.

a group of muscles that decrease the size of an opening

a)

extensor

b)

adductor

c)

supinator

d)

sphincter

21.

a group of muscles that move a bone away from the midline

a)

tensor

b)

abductor

c)

rotator

d)

extensor

22.

a group of muscles that make a body part more rigid

a)

tensor

b)

abductor

c)

rotator

d)

extensor

23.

a group of muscles that move a bone toward the midline

a)

extensor

b)

adductor

c)

supinator

d)

sphincter

24.

shortest muscle in a muscle group

a)

minimus

b)

brevis

c)

maximus

d)

longus

25.

largest muscle in a muscle group

a)

minimus

b)

brevis

c)

maximus

d)

longus

26.

smallest muscle in a muscle group

a)

minimus

b)

brevis

c)

maximus

d)

longus

27.

longest muscle in a muscle group

a)

minimus

b)

brevis

c)

maximus

d)

longus

28.

biceps brachi

a)

Q

b)

R

c)

S

d)

T

29.

Orbicularis oculi

a)

K

b)

L

c)

M

d)

N

30.

rectus abdominus

a)

C

b)

D

c)

E

d)

F

31.

adductor longus

a)

T

b)

U

c)

F

d)

G

32.

Deltoid

a)

P

b)

Q

c)

R

d)

B

33.

Sartorius

a)

F

b)

G

c)

H

d)

I

34.

Pectoralis major

a)

C

b)

D

c)

Q

d)

R

35.

Trapezius

a)

B

b)

C

c)

D

d)

E

36.

triceps brachi

a)

B

b)

C

c)

D

d)

E

37.

Sartorius

a)

O

b)

P

c)

G

d)

H

38.

Gluteus maximus

a)

M

b)

N

c)

O

d)

G

39.

hamstring group

a)

C

b)

K

c)

G

d)

H

40.

sternocleido mastoid

a)

A

b)

B

c)

C

d)

D

41.

Achilles tendon

a)

G

b)

H

c)

I

d)

Q

42.

latissimus dorsi

a)

L

b)

M

c)

N

d)

O

43.

extensor digitorum

a)

F

b)

H

c)

J

d)

K