Muscle Tissue

Question 1

What are the 5 functions of muscle tissue

Answer 1

Movement
Posture maintenance
Stabilization of joints
Protection of internal organs
Temperature regulation

Question 2

A characteristic of Muscle tissue that responds to changes in electrical potentials across cell membrane

Answer 2

Excitability

Question 3

Smooth and cardiac muscles are examples of this type of muscle

Answer 3

Involuntary

Question 4

What is the only type of voluntary muscle

Answer 4

Skeletal

Question 5

It is the characteristic of muscle that can stretch and return to itd original shape

Answer 5

Elasticity

Question 6

The characteristic of muscle that can stretch or extend

Answer 6

Extensibility

Question 7

It is a characteristic of that pulls on attachment sites and shorten

Answer 7

Contractility

Question 8

List the 4 characteristic of muscle

Answer 8

Excitability
Elasticity
Extensibility
Contractility

Question 9

What are the 3 visual characteristics of skeletal tissue

Answer 9

Long, multinucleated
Cylindrical
Striated

Question 10

What are the 3 visual characteristics of cardiac muscles

Answer 10

1 or 2
Shorter Branching cells
Striated

Question 11

What are the 3 visual characteristics of
Smooth muscle

Answer 11

One nucleus
Spindle shaped
Non striated

Question 12

What are the 3 connective tissue coverings of skeletal muscle

Answer 12

Epimysium
Perimisuim
Endomysium

Question 13

Surrounds entire muscle and fuses with tendons to link with muscle

Answer 13

Epimysium

Question 14

Additional layer of CT external to the epimysium

Answer 14

Fascia

Question 15

Surrounds fasicles

Answer 15

Perimysium

Question 16

Are bundles of muscle cells

Answer 16

Fascicles

Question 17

Surrounds individual muscle cells

Answer 17

Endomysium

Question 18

It is the cell membrane of skeletal muscles

Answer 18

Sarcolemma

Question 19

It is the cytoplasm of the skeletal muscle

Answer 19

Sarcoplasm

Question 20

It is the endoplasmic reticulum that stores calcium

Answer 20

Sarcoplasmic reticulum

Question 21

Extensions of sarcolemma

Answer 21

Transverse tubules (T-tubules)

Question 22

Cylinders of contractile proteins

Answer 22

Myofibrils

Question 23

What is the Greek word for flesh

Answer 23

Sarco

Question 24

It is the contractile unit of the skeletal muscle

Answer 24

The sarcomere

Question 25

The thick filament of the sarcomere Is made out of ___________

Answer 25

Myosin

Question 26

The thin filament of the sarcomere Is made out of ___________

Answer 26

Actin

Question 27

The thin filament of the sarcomere is associated with these 2 regulatory proteins

Answer 27

Troponin and tropomyosin

Question 28

This describes how the sarcomere shortens

Answer 28

The sliding filament model of muscle contraction Thin filaments slide past thick filaments towards the M line

Question 29

Number the process from (1-6) Myosin head on thick filament binds to thin filament And results into what?

Answer 29

3. Cross bridge formation

Question 30

Number the process from (1-6) Myosin head re-cocks Continue to pull as long as ATP is available and binding sites are exposed

Answer 30

5.

Question 31

Number the process from (1-6) Calcium released from SR binds to troponin

Answer 31

1.

Question 32

Number the process from (1-6) Myosin head uses the power of ATP to pull filaments towards the M line

Answer 32

4.

Question 33

Number the process from (1-6) Z discs move closer together and sarcomere shortens

Answer 33

6.

Question 34

Number the process from (1-6) Shape changes shape tropomyosin

Answer 34

2.

Question 35

What regulates the cross bridge formation between thick and thin myosin

Answer 35

Troponin and tropomyosin

Question 36

This wraps around the thin (actin) filament and covers myosin (thick filament) binding sites

Answer 36

Tropomyosin

Question 37

This moves tropomyosin to expose myosin binding sites on the actin filament

Answer 37

Troponin

Question 38

Occurs when calcium ions bind to ________

Answer 38

Troponin

Question 39

This occurs when muscles can no longer contract

Answer 39

Muscle fatigue

Question 40

What are the multiple causes of muscle depletion

Answer 40

Lack of ATP Lactip acid and ADP build up Impaired ion movement Inadequate release of calcium from sarcoplasmic reticulum

Question 41

Type of muscle fiber Contracts slowly Weakest Produces ATP via aerobic respiration Fatigues the slowest Maintains posture and stabilizes joints

Answer 41

Slow oxidative muscle fiber

Question 42

Slow oxidative muscle fiber is red because of the presence of __________

Answer 42

Myoglobin

Question 43

This type of muscle fiber has Fast contractions Strongest Produces ATP via glycolysis Stores glycogen in higher amounts Fatigues quickly Is used for fast powerful movements

Answer 43

Fast glycolytic muscle fibers

Question 44

Posseses characteristics of both SO AND FG Contracts quickly More fatigue resistant than FG fibers Used for walking

Answer 44

Fast oxidative muscle fibers

Question 45

Fast oxidative muscle fibers are also known as _________

Answer 45

Intermediate fibers

Question 46

Force generated by muscle contraction

Answer 46

Muscle tension

Question 47

When a muscle contracts but does not move a load

Answer 47

Isometric contraction

Question 48

When a muscle contracts and moves a load

Answer 48

Isotonic contraction

Question 49

Muscles lengthen and moves a load

Answer 49

Eccentric contraction

Question 50

Muscles shorten and moves a load

Answer 50

Concentric contraction

Question 51

Singular contraction of a muscle cell

Answer 51

Twitch

Question 52

Displays the amount of tension produced by a twitch over a period of time

Answer 52

Myogram

Question 53

Action potential is propagated along the sarcolemma and calcium ions release from SR No contractions occur during this phase

Answer 53

Latent phase

Question 54

Cross bridges have formed and sarcomeres shorten Peak of tension

Answer 54

Contraction phase

Question 55

Calcium ions are pumped back to SR an cross bridge cycling stops Tension decreases

Answer 55

Relaxation phase

Question 56

Run the length of the muscle fiber and attach to the sarcolemma

Answer 56

Myofibrils

Question 57

Region spanning the length of the thick filament

Answer 57

A-Band

Question 58

Region containing only the thin filament

Answer 58

I band

Question 59

Horizontal line in the center of the sarcomere

Answer 59

M line

Question 60

Space where only thick filament can be found

Answer 60

H zone

Question 61

Space where only thick filament can be found

Answer 61

H zone