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MUSCLE QUIZ 1

Total questions: 29

Worksheet time: 29mins

Name
Class
Date
1.
The connective tissue sheath that envelops bundles of muscle fibers is the:
a)
perimysium.
b)
endomysium.
c)
periosteum
d)
epimysium. 
2.
The covering of individual muscle fibers is the:
a)
 epimysium. 
b)
 periosteum.
c)
endomysium.
d)
perimysium.
3.
Groups of skeletal muscle fibers are bound together by a connective tissue envelope called the:
a)
endomysium.
b)
epimysium.
c)
perimysium.
d)
aponeurosis.
4.
Muscles may be named according to:
a)
function.
b)
points of attachment.
c)
direction of fibers.
d)
all of the above.
5.
A muscle is attached to the femur and the tibia. When the muscle contracts, the knee bends. That would mean that the:
a)
 tibia attachment is the origin.
b)
 tibia attachment is the insertion.
c)
 femur attachment is the insertion.
d)
Both A and B are correct.
6.
The plasma membrane of a muscle fiber is called the:
a)
sarcolemma
b)
 myofibril. 
c)
sarcoplasm.
d)
sarcomere.
7.
Bundles of fine fibers that extend lengthwise along muscle fibers are called:
a)
myofibrils. 
b)
myofilaments
c)
striae
d)
sarcoplasmic reticulum.
8.
The smallest contractile unit of muscle is a/an
a)
fiber.
b)
myofibril
c)
sarcomere
d)
myofilament.
9.
_____ muscle is also known as striated muscle.
a)
 Visceral
b)
Involuntary
c)
Skeletal 
d)
Smooth
10.
Which of the following proteins found in myofilaments contains the cross-bridges?
a)
Troponin
b)
 Tropomyosin
c)
Actin 
d)
Myosin 
11.
Thick myofilaments extend the length of the:
a)
A-band.
b)
 Z-line.
c)
 I-band.
d)
None of the above are correct.
12.
The neurotransmitter(s) secreted at the motor end plates of skeletal muscles is(are):
a)
dopamine.
b)
 norepinephrine.
c)
acetylcholine.
d)
any of the above.
13.
The ion necessary for cross-bridging is:
a)
iron. 
b)
sodium.
c)
. potassium.
d)
. calcium.
14.
Physiological muscle fatigue may be caused by:
a)
a relative lack of ATP
b)
high levels of lactic acid. 
c)
failure of the sodium-potassium pumps
d)
all of the above.
15.

Which of the following types of muscle tissue contains cells that have a single nucleus?

a)

Cardiac

b)

Smooth

c)

Skeletal

d)

Two of these answers are correct

16.
From smallest to largest, which of the following is the correct order of arrangement?
a)
Fiber, myofibril, myofilament 
b)
Myofibril, myofilament, fiber 
c)
 Myofilament, myofibril, fiber
d)
Fiber, myofilament, myofibril
17.
Sarcolemma is a
a)
a. system of transverse tubules that extend at a right angle to the long axis of the cell.
b)
segment of the myofibril between two successive Z-lines
c)
unique name for the plasma membrane of a muscle fiber. 
d)
 None of the above are correct.
18.
The characteristic of the muscle cell that directly causes movement is:
a)
excitability. 
b)
. irritability.
c)
contractility. 
d)
extensibility.
19.
A sarcomere is a segment of myofibril between two successive: 
a)
 Z-lines.
b)
A-bands. 
c)
I-bands. 
d)
H-bands.
20.
The motor end plate makes up part of the 
a)
Z-line. 
b)
 T-tubules
c)
sarcoplasmic reticulum.
d)
neuromuscular junction.
21.

A muscle that assists with mastication is the:

a)

orbicularis oris

b)

platysma.

c)

buccinator

d)

masseter.

22.

Which of the following muscle(s) function(s) to protect the abdominal viscera?

a)

External oblique

b)

Internal oblique

c)

Transversus abdominis

d)

All of the choices listed

23.

The origin of a muscle is on the femur, and the insertion is on the tibia. When it contracts, it bends the knee. Its fibers run parallel to the body. Which of the following terms might be part of its name?

a)

Extensor

b)

Flexor

c)

Adductor

d)

Abductor

24.

Which of the following statements is incorrect?

a)

The origin of the muscle is attached to the bone that does not move.

b)

The insertion of the muscle is attached to the bone that moves.

c)

When the muscle contracts, the insertion moves toward the origin.

d)

All of the above are correct.

25.

Which of the following muscles does not move the upper arm?

a)

Trapezius

b)

Pectoralis major

c)

Latissimus dorsi

d)

Deltoid

26.

The muscle that allows the thumb to be drawn across the palm to touch the tip of any finger is the:

a)

extensor digitorum.

b)

opponens pollicis.

c)

palmaris longus.

d)

flexor carpi radialis.

27.

The muscle that extends and adducts the arm is the:

a)

deltoid.

b)

latissimus dorsi.

c)

trapezius.

d)

pectoralis minor.

28.

The posterior arm muscle that extends the forearm is the:

a)

biceps brachii.

b)

triceps brachii.

c)

supinator.

d)

brachialis.

29.

Muscles that move the upper arm originate on the:

a)

ulna and humerus.

b)

clavicle and scapula.

c)

humerus.

d)

ulna and radius.

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