Skeletal Muscle Tissue

Question 1

What is the primary function of skeletal muscle tissue?

Answer 1

To facilitate voluntary movement of the body.

Question 2

True or False: Skeletal muscle tissue is striated.

Answer 2

True

Question 3

Fill in the blank: Skeletal muscles are attached to _____ by tendons.

Answer 3

bones

Question 4

What type of control do skeletal muscles operate under?

Answer 4

Voluntary control

Question 5

What are the basic structural units of skeletal muscle?

Answer 5

Muscle fibers or myofibers

Question 6

Which protein filaments are primarily involved in muscle contraction?

Answer 6

Actin and myosin

Question 7

What is the function of the sarcoplasmic reticulum in skeletal muscle cells?

Answer 7

To store and release calcium ions.

Question 8

True or False: Skeletal muscle fibers are multinucleated.

Answer 8

True

Question 9

What is the term for the connective tissue that surrounds each muscle fiber?

Answer 9

Endomysium

Question 10

Which connective tissue layer surrounds a whole muscle?

Answer 10

Epimysium

Question 11

What is the role of the perimysium in skeletal muscle?

Answer 11

To surround bundles of muscle fibers (fascicles).

Question 12

Fill in the blank: Skeletal muscle fibers contain many _____ for energy production.

Answer 12

mitochondria

Question 13

What is the name of the cellular membrane that encloses a muscle fiber?

Answer 13

Sarcolemma

Question 14

What is the name of the functional unit of muscle contraction?

Answer 14

Sarcomere

Question 15

What is the role of troponin in muscle contraction?

Answer 15

To regulate the interaction between actin and myosin.

Question 16

True or False: Skeletal muscle can regenerate after injury.

Answer 16

True

Question 17

What type of muscle fibers are known for endurance and are rich in mitochondria?

Answer 17

Type I fibers (slow-twitch fibers)

Question 18

Which type of muscle fibers are known for quick bursts of power but fatigue quickly?

Answer 18

Type II fibers (fast-twitch fibers)

Question 19

Fill in the blank: The process of muscle contraction is initiated by the release of _____ ions.

Answer 19

calcium

Question 20

What is muscle hypertrophy?

Answer 20

An increase in muscle size due to exercise or training.

Question 21

What is the primary source of energy for muscle contraction?

Answer 21

Adenosine triphosphate (ATP)

Question 22

What is the term for a muscle that opposes the action of another muscle?

Answer 22

Antagonist

Question 23

What do we call the muscle that assists in the action of the prime mover?

Answer 23

Synergist

Question 24

What is the role of the motor neuron in skeletal muscle function?

Answer 24

To transmit signals from the nervous system to muscle fibers.

Question 25

True or False: Skeletal muscles have a single motor unit.

Answer 25

False

Question 26

What is the effect of resistance training on skeletal muscle?

Answer 26

Increases muscle strength and size.

Question 27

Fill in the blank: The process of converting chemical energy into mechanical energy in muscle is called _____.

Answer 27

muscle contraction

Question 28

What are the visible striations in skeletal muscle due to?

Answer 28

The arrangement of actin and myosin filaments.

Question 29

What is the role of the neuromuscular junction?

Answer 29

To transmit signals from motor neurons to muscle fibers.

Question 30

True or False: Skeletal muscle can be involuntarily controlled.

Answer 30

False

Question 31

What is the term for the muscle's ability to respond to stimuli?

Answer 31

Excitability

Question 32

Fill in the blank: The _____ is the region where the muscle fiber meets the motor neuron.

Answer 32

neuromuscular junction

Question 33

Which neurotransmitter is released at the neuromuscular junction?

Answer 33

Acetylcholine

Question 34

What is the result of the binding of acetylcholine to receptors on the muscle fiber?

Answer 34

Depolarization of the sarcolemma.

Question 35

True or False: Muscle fibers can only contract in one direction.

Answer 35

True

Question 36

What is the term for the shortening of muscle fibers during contraction?

Answer 36

Concentric contraction

Question 37

What is the term for muscle contraction without shortening?

Answer 37

Isometric contraction

Question 38

What is the role of creatine phosphate in muscle metabolism?

Answer 38

To regenerate ATP during short bursts of activity.

Question 39

Fill in the blank: The _____ phase of muscle contraction involves the sliding of actin over myosin.

Answer 39

contraction

Question 40

What is the primary function of the muscle spindle?

Answer 40

To detect changes in muscle length.

Question 41

What is the role of Golgi tendon organs?

Answer 41

To sense changes in muscle tension.

Question 42

True or False: Skeletal muscle fibers can be classified based on their contraction speed.

Answer 42

True

Question 43

What type of muscle fibers are more fatigue-resistant?

Answer 43

Type I fibers (slow-twitch fibers)

Question 44

What type of muscle fibers are better for anaerobic activities?

Answer 44

Type II fibers (fast-twitch fibers)

Question 45

Fill in the blank: The _____ is the fundamental unit of contraction in a muscle.

Answer 45

sarcomere

Question 46

What happens to muscle fibers during atrophy?

Answer 46

They decrease in size and strength.

Question 47

True or False: Muscle fibers can be recruited in varying numbers depending on the force needed.

Answer 47

True

Question 48

What is the primary role of the fascia in skeletal muscle?

Answer 48

To provide support and structure.

Question 49

What is the effect of aging on skeletal muscle tissue?

Answer 49

Decreased muscle mass and strength.

Question 50

What is the term for a muscle that is primarily responsible for a specific movement?

Answer 50

Agonist

Question 51

Fill in the blank: The _____ is responsible for the transmission of the action potential in muscle fibers.

Answer 51

T-tubule system

Question 52

What is the role of calcium ions in muscle contraction?

Answer 52

To bind to troponin and enable actin-myosin interaction.

Question 53

True or False: Muscle fatigue can be caused by depletion of ATP.

Answer 53

True

Question 54

What is the term for muscle contraction that occurs when a muscle is stretched?

Answer 54

Eccentric contraction

Question 55

Fill in the blank: Muscle contractions require _____ for energy.

Answer 55

ATP

Question 56

What is the role of lactic acid in muscle metabolism?

Answer 56

It is a byproduct of anaerobic respiration during intense exercise.

Question 57

What is the significance of the sarcoplasmic reticulum in muscle contraction?

Answer 57

It releases calcium ions needed for contraction.

Question 58

True or False: Skeletal muscles are the only muscle type that is under voluntary control.

Answer 58

True

Question 59

What is the primary component of the thick filaments in muscle fibers?

Answer 59

Myosin

Question 60

What is the primary component of the thin filaments in muscle fibers?

Answer 60

Actin