Muscular Tissue

Question 1

Muscular tissue accounts for what percentage of total body mass?

Answer 1

40-50%

Question 2

What are the three types of muscular tissue?

Answer 2

Skeletal
Cardiac
Smooth

Question 3

What are the four functions of muscular tissue?

Answer 3

Producing body movements
Stabilizing body position
Control of body openings and passages
Producing heat

Question 4

What are the five properties of muscular tissue?

Answer 4

Electrical excitability
Conductivity
Contractility
Extensibility
Elasticity

Question 5

What is connected by tendons to the skeleton?

Answer 5

Body or belly of muscle.

Question 6

_______ wraps around each myofiber.

Answer 6

Endomysium

Question 7

_______ wraps multiple myofibers creating fascicle.

Answer 7

Perimysium

Question 8

______ wraps around the entire muscle and extends beyond muscle to form tendon.

Answer 8

Epimysium

Question 9

_____ wraps muscle group separating it from neighboring groups.

Answer 9

Fascia

Question 10

How much of the heart’s output does muscle receive while at rest?

Answer 10

1/4

Question 11

How much of the heart’s output does muscle receive during exercise?

Answer 11

3/4

Question 12

What motor neurons are used to innervate muscle?

Answer 12

Somatic Motor Neurons

Question 13

What is a myofiber?

Answer 13

Skeletal muscle cell

Question 14

What does hypertrophy mean?

Answer 14

Increasing muscle size

Question 15

Myofibers do not undergo ______.

Answer 15

Mitosis

Question 16

The filaments are arranged in compartments called _______.

Answer 16

Sarcomeres

Question 17

What causes the striated appearance of skeletal muscle?

Answer 17

The thick and thin filaments that overlap that consists of zones and bands.

Question 18

What are the thick and thin filaments made of in the muscle?

Answer 18

Protein

Question 19

What are the three proteins that build myofibrils?

Answer 19

Contractile Proteins
Regulatory Proteins
Structural Proteins

Question 20

What is the major component of thick filaments?

Answer 20

Myosin

Question 21

What is the major component of thin filaments?

Answer 21

Actin

Question 22

What are the key structural proteins?

Answer 22

Titin
Myosin
Nebulin
Dystrophin

Question 23

The first step of a nerve impulse is the release of _____.

Answer 23

Acetylcholine

Question 24

The second step of nerve impulse is the activation of ____ _____.

Answer 24

Acetylcholine receptors

Question 25

The third step of nerve impulse is the production of muscle ______ ______.

Answer 25

Action Potential

Question 26

The fourth step of nerve impulse is the termination of ______ ______.

Answer 26

Acetylcholine Activity

Question 27

An example of an autoimmune disease where the acetylcholine receptors are attacked by own impulse system is...

Answer 27

Myasthenia Gravis

Question 28

What is released from the channels during the excitation-contraction coupling phase?

Answer 28

Calcium

Question 29

What active transport pumps are used during the excitation-contraction coupling phase?

Answer 29

Calcium active transport pumps

Question 30

During the contraction cycle, ATP _______ is the first step.

Answer 30

Hydrolysis

Question 31

Attachment of myosin to acting to form _____ _____, is the second step in the contraction cycle.

Answer 31

Cross bridges

Question 32

What is the third step in the contraction cycle?

Answer 32

Power Stroke

Question 33

After the muscle contraction myosin _______ from actin.

Answer 33

Detaches

Question 34

What are the two types of smooth muscle?

Answer 34

Visceral smooth muscle tissue | Multiunit smooth muscle tissue

Question 35

What muscle tissue is involuntary, non-striated, uninucleate, and has tapered cells?

Answer 35

Smooth Muscle Tissue

Question 36

What muscle tissue is striated, involuntary, uninucleated, and branched?

Answer 36

Cardiac Muscle Tissue

Question 37

What degenerative disease primarily affects voluntary muscles?

Answer 37

Muscular Dystrophy

Question 38

What gene is mutated in muscular dystrophy?

Answer 38

Dystrophin Gene

Question 39

In Duchenne muscular dystrophy, the primary difference is that ____ functional protein is produced.

Answer 39

No

Question 40

In Becker muscular dystrophy, ______ _____, shorter protein is produced.

Answer 40

Partially Functioning

Question 41

In Duchenne muscular dystrophy the onset is ages _______. In Becker muscular dystrophy the onset is age ______.

Answer 41

3-5 years Teens

Question 42

What are the three main skeletal fibers?

Answer 42

Slow Oxidative Fibers Fast Oxidative-glycolytic Fibers Fast Glycolytic Fibers