Deck 10: Skeletal Muscle Tissue

Question 1

The only muscle cells that branch are ________ muscle cells.

A) skeletal
B) smooth
C) cardiac
D) red

Answer 1

C

Question 2

This type of muscle makes up the walls of hollow organs, such as the stomach and uterus.

A) skeletal muscle
B) smooth muscle
C) cardiac muscle

Answer 2

B

Question 3

Which type of muscle fiber has no myofibrils?

A) skeletal
B) smooth
C) cardiac
D) red

Answer 3

B

Question 4

Which of these correctly matches the property of muscle tissue with its definition?

A) Contractility - the ability to recoil after stretching
B) Excitability - the ability to shorten with contraction
C) Extensibility - the ability to be stretched
D) Elasticity - the ability to conduct an impulse

Question 5

Muscle tissue is endowed with all of the following properties except

A) excitability.
B) contractibility.
C) extensibility.
D) transmissibility.

Question 6

This type of muscle attaches to bone, but may also attach to skin, cartilage, fascia or a raphe.

A) skeletal muscle
B) smooth muscle
C) cardiac muscle

Question 7

Use the diagram above to answer the following questions.
This structure is composed entirely of dense regular connective tissue and connects bone to muscle.

A) A
B) B
C) C
D) D
E) E

Question 8

Visceral muscle refers to

A) skeletal muscle and cardiac muscle.
B) cardiac muscle and smooth muscle.
C) skeletal muscle and smooth muscle.
D) smooth muscle only.

Question 9

This type of muscle contains intercalated discs.

A) skeletal muscle
B) smooth muscle
C) cardiac muscle

Question 10

Which type of muscle fiber has caveolae but no T tubules?

A) skeletal
B) cardiac
C) smooth
D) white

Question 11

All of these are functions of muscle tissue except

A) production of movement
B) maintain posture
C) generate heat
D) line surfaces in the body

Question 12

A common characteristic of the three types of muscle tissue is that

A) they all have striations.
B) contraction is triggered by the release of calcium.
C) they all contain sarcomeres.
D) they can all use aerobic and anaerobic methods to utilize energy.

Question 13

This type of muscle is found in the heart.

A) skeletal muscle
B) smooth muscle
C) cardiac muscle

Question 14

Both cardiac muscle and this type of muscle are called involuntary.

A) skeletal muscle
B) smooth muscle
C) cardiac muscle

Question 15

This type of muscle composes the largest share of muscle weight in the human body.

A) skeletal muscle
B) smooth muscle
C) cardiac muscle

Question 16

Both single-unit smooth muscle and this type of muscle have gap junctions.

A) skeletal muscle
B) smooth muscle
C) cardiac muscle

Question 17

Contractions of these muscles are under voluntary control.

A) skeletal muscle
B) smooth muscle
C) cardiac muscle

Question 18

This type of muscle includes the fast oxidative fibers.

A) skeletal muscle
B) smooth muscle
C) cardiac muscle

Question 19

This type of muscle is found in large blood vessels leading to and from the heart.

A) skeletal muscle
B) smooth muscle
C) cardiac muscle

Question 20

A cell of this type of muscle is striated and can be uninucleated or binucleated.

A) skeletal muscle
B) smooth muscle
C) cardiac muscle

Question 21

A muscle fascicle is

A) a bundle of cells.
B) a single muscle cell.
C) a bundle of myofilaments.
D) a tendon.

Question 22

Use the diagram above to answer the following questions.
Identify the letter that indicates the thick (myosin) filament.

A) A
B) B
C) C
D) D
E) E

Question 23

The layer of connective tissue that surrounds the whole skeletal muscle is the

A) epimysium
B) perimysium
C) endomysium
D) exomysium

Question 24

Use the diagram above to answer the following questions.
Identify the letter that indicates the thin (actin) filament.

A) A
B) B
C) C
D) D
E) E

Question 25

The area that contains no thin filaments is known as the

A) H zone.
B) I band.
C) intercalated disc.
D) A band.

Question 26

The type of attachment in which the muscle fibers seem to attach directly to a bone is

A) a tendon.
B) an aponeurosis.
C) an insertion.
D) a fleshy attachment.

Question 27

An aponeurosis is

A) a large muscle.
B) a nerve to a muscle.
C) clinical pain in a muscle.
D) a sheet of dense connective tissue.

Question 28

Use the diagram above to answer the following questions.
Identify the letter that indicates the epimysium.

A) A
B) B
C) C
D) D
E) E

Question 29

Which of these is not in direct contact with thick myofilaments?

A) myosin
B) actin
C) ATPase
D) synaptic vesicles

Question 30

All of following are true regarding blood and nerve supply to muscles except

A) Vessels and nerves enter a muscle near the middle of its length.
B) Generally, a muscle is supplied by one nerve and one artery.
C) Nerves and vessels branch and travel within the connective tissue in the muscle.
D) Muscles have low need for nutrients and oxygen, so they have few blood vessels.

Question 31

Use the diagram above to answer the following questions.
This letter indicates an individual fascicle.

A) A
B) B
C) C
D) D
E) E

Question 32

Use the diagram above to answer the following questions.
This structure is the basic unit of contraction.

A) A
B) B
C) C
D) D
E) E

Question 33

Use the diagram above to answer the following questions.
Identify the letter that indicates the I band.

A) A
B) B
C) C
D) D
E) E

Question 34

Use the diagram above to answer the following questions.
Identify the letter that indicates the endomysium.

A) A
B) B
C) C
D) D
E) E

Question 35

Use the diagram above to answer the following questions.
Identify the letter that indicates the muscle fiber.

A) A
B) B
C) C
D) D
E) E

Question 36

Which statement about muscle attachments is false?

A) An insertion can be at either attachment point of a muscle, depending on body position and the movement being performed.
B) At least one joint is present between an origin and insertion.
C) Insertions are usually distal to the origin.
D) Upon contraction, the origin is pulled toward the insertion.

Question 37

Much of the natural elasticity of skeletal muscle tissue is provided by

A) actin.
B) myosin.
C) tendons.
D) connective tissue sheaths.

Question 38

Use the diagram above to answer the following questions.
Identify the letter that indicates the titin filament.

A) A
B) B
C) C
D) D
E) E

Question 39

A skeletal muscle fiber

A) is a relatively small, short cell.
B) contains a single myofibril.
C) contains a single nuclei, like most cells.
D) is a cylindrical cell formed by the fusion of many embryonic cells.

Question 40

In limbs, the insertions of muscles almost always lie ________ to their origins.

A) proximal
B) distal
C) lateral
D) posterior

Question 41

The sarcoplasmic reticulum (SR) stores

A) calcium.
B) sodium.
C) ATPase.
D) myosin.

Question 42

Which of the following correctly defines a triad of the sarcomere?

A) a T tubule and two adjacent terminal cisterns
B) actin, myosin, and titin
C) an axon terminal, synaptic cleft, and sarcolemma
D) actin, troponin, and tropomyosin

Question 43

In striated muscle, the I band is where

A) only thick filaments occur.
B) thin filaments occur.
C) H zones occur.
D) thick and thin filaments occur.

Question 44

Titin

A) connects myosin to actin.
B) forms the Z disk to which actin attaches.
C) limits the degree to which a muscle may contract.
D) prevents a muscle from being overstretched.

Question 45

After a muscle fiber has contracted, the calcium

A) is destroyed.
B) is chemically bound to the myofilaments.
C) is secreted by the Golgi apparatus.
D) is actively transported into the sarcoplasmic reticulum.

Question 46

Which region of the sarcomere does not change in length during contraction?

A) A band
B) H zone
C) I band
D) Z disk to Z disk

Question 47

When the distance between two adjacent Z disks grows shorter, the muscle fiber is experiencing

A) concentric contraction.
B) eccentric contraction.
C) isometric contraction.
D) relaxation.

Question 48

As a muscle is stretched, the Z discs move further apart, and the I band increases in size. What is the role if titin in this situation?

A) It prevents the sarcomere from being pulled apart as this stretching occurs.
B) It prevents the thick filaments from sliding over the thin filaments.
C) It moves the tropomyosin molecule from the actin filament.
D) It is required for the release of ATP in this process.

Question 49

Terminal boutons

A) are the small areas at the end of motor dendrite processes.
B) store hormones that influence muscular contraction.
C) make a direct connection with the muscle fiber, with no space in between.
D) sit within depressions in the sarcolemma.

Question 50

In skeletal muscle fibers, which band or zone contains both thick and thin myofilaments?

A) A
B) H
C) I
D) Z

Question 51

Each nerve impulse to a muscle fiber is able to create just one twitch of that fiber because

A) acetylcholine is a weak neurotransmitter only capable of generating one twitch at a time.
B) Acetylcholinesterase breaks down acetylcholine immediately after the contraction is signaled.
C) The sarcolemma is only able to release calcium once per millisecond.
D) The muscle fiber is easily fatigued, so it can only twitch once before needing an interval of rest.

Question 52

Acetylcholine

A) binds to the myosin head, enabling it to form cross-bridges with actin.
B) binds to the sarcolemma and initiates an impulse in the muscle fiber.
C) breaks down the neurotransmitter that activates muscle fibers.
D) is released from the sarcoplasmic reticulum and binds to actin.

Question 53

The sleeve-like tubular network within skeletal muscle cells is the

A) sarcoplasmic reticulum.
B) rough endoplasmic reticulum.
C) myofibril.
D) T tubule.

Question 54

Sarcoplasmic reticulum lies

A) between fibers but in myofilaments.
B) between myofibrils but in fibers.
C) between fascicles but outside fibers.
D) between muscles but in myofilaments.

Question 55

All of the following are true regarding innervation of skeletal muscle except

A) A single muscle fiber is innervated by many different neurons.
B) The neuromuscular junction is the point where the muscle fiber and nerve ending meet.
C) The nerves that innervate muscle fibers are called motor neurons.
D) The nervous impulse stimulates initiates the release of calcium ions from the sarcoplasmic reticulum.

Question 56

Eccentric contraction

A) generates force as the muscle lengthens.
B) generates force without changing the length of the muscle.
C) pulls the insertion toward the origin.
D) shortens the muscle.

Question 57

All of the following are true regarding motor units except

A) Muscles in the fingers have a small number of muscle fibers per motor unit.
B) If needed, additional motor units can be recruited to accomplish a movement.
C) A muscle can produce more force if more motor units are recruited.
D) A single motor unit only innervates muscle fibers in a small area of a muscle.

Question 58

In striated muscle cells, which of these structures stores calcium ions that trigger contraction?

A) the internal surface of the plasma membrane
B) the terminal cisterns
C) T tubules
D) the myofibrils

Question 59

The ability of the sarcolemma of muscle cells to conduct an impulse is an example of

A) contractility.
B) excitability.
C) extensibility.
D) elasticity.

Question 60

A motor unit includes

A) a motor neuron and all of the muscle fibers it innervates.
B) a muscle fiber and the single neuron that innervates it.
C) all of the motor neurons and fibers within a single fascicle.
D) all of the muscle fibers within a single muscle.

Question 61

Of the various types of skeletal muscle fibers, the ones supplied by the most capillaries are

A) slow oxidative fibers.
B) fast glycolytic fibers.
C) fast oxidative fibers.
D) slow glycolytic fibers.

Question 62

With intense resistance training,

A) fast glycolytic fibers can convert to fast oxidative fibers.
B) fast oxidative fibers can convert to fast glycolytic fibers.
C) slow oxidative fibers can convert to fast glycolytic fibers.
D) slow oxidative fibers can convert to fast oxidative fibers.

Question 63

The embryonic origin of muscle tissue is from

A) endoderm.
B) mesoderm.
C) ectoderm.
D) epidermis.

Question 64

Fascicles are bundles of muscle fibers wrapped together within perimysium.

Question 65

Age-related loss of muscle mass may be influenced by all of these except

A) an increase in the relative proportion of connective tissue to number of muscle fibers.
B) decrease in the level of testosterone.
C) degeneration of muscle fibers because of accumulation of calcium in the sarcoplasm.
D) exhaustion of the supply of muscle satellite cells.

Question 66

Skeletal muscle is responsible for movements of the appendages, but not the abdomen.

Question 67

As skeletal muscles enlarge in a weight lifter, all of the following occur except

A) muscle cells divide mitotically.
B) muscle cells grow larger.
C) myofilaments become more abundant in the muscle cells.
D) myofibrils become more abundant in the muscle cells.

Question 68

Of the various types of skeletal muscle fibers, the type with the most mitochondria is

A) slow oxidative fibers.
B) fast glycolytic fibers.
C) fast oxidative fibers.
D) slow glycolytic fibers.

Question 69

One of the largest and strongest muscles in the body is the gluteus maximus in the buttocks, which is important in these diverse muscular activities: walking, running, and jumping. It must consist of

A) slow oxidative fibers only.
B) fast glycolytic fibers only.
C) fast oxidative fibers only.
D) a mixture of fiber types.

Question 70

Of the various types of skeletal muscle fibers, the ones with the thinnest myofibrils, and, therefore, the ones that generate the least amount of power, are

A) slow oxidative fibers.
B) fast glycolytic fibers.
C) fast oxidative fibers.
D) slow glycolytic fibers.

Question 71

Of the various types of skeletal muscle fibers, the fibers that experience fatigue sooner are

A) slow oxidative fibers.
B) fast glycolytic fibers.
C) fast oxidative fibers.
D) slow glycolytic fibers.

Question 72

Muscle tissue can be characterized as being excitable and elastic, but not extensible.

Question 73

The origin of a muscle can also be an insertion, depending on the position of the body and the movement being performed.

Question 74

Of the surrounding connective tissues of the muscle, the endomysium is the most superficial.

Question 75

In muscular dystrophy, the protein dystrophin, which strengthens the sarcolemma by connecting the cytoskeleton with the extracellular matrix, is missing. What would be a consequence of these fibers lacking this important sarcolemma strengthening protein?

A) The sarcolemma would be weak and tear, allowing extracellular substances, including calcium ions, into the cell and disrupting muscle function.
B) The sarcolemma would become thick and fibrous, impeding ion exchange across it.
C) The sarcolemma would function normally, as this protein isn't important to muscle function.
D) The sarcolemma would shrink, compressing the contents of the muscle fiber and disrupting muscle function.

Question 76

Sarcopenia is a condition that occurs in muscle tissue with aging. As a person ages, their muscle tissue

A) decreases overall, leading to a decrease in strength.
B) decreases due to the muscle's need for greater energy.
C) increases due to an increased amount of actin in the muscle fiber.
D) increases due to increased blood flow to the muscles.

Question 77

Of the various types of skeletal muscle fibers, the type containing the most glycogen granules is

A) slow oxidative fibers.
B) fast glycolytic fibers.
C) fast oxidative fibers.
D) slow glycolytic fibers.

Question 78

Of the various types of skeletal muscle fibers, the fibers most resistant to fatigue are

A) slow oxidative fibers.
B) fast glycolytic fibers.
C) fast oxidative fibers.
D) slow glycolytic fibers.

Question 79

Myoglobin

A) binds and stores oxygen for ATP production.
B) is found within the T tubules.
C) is released by the sarcoplasmic reticulum.
D) provides energy for contraction.

Question 80

Of the various types of skeletal muscle fibers, the type that produces the most power is

A) slow oxidative fibers.
B) fast glycolytic fibers.
C) fast oxidative fibers.
D) slow glycolytic fibers.