Muscle slide Q's

Question 1

What are the functions of muscle tissue

Answer 1

• Movement
• Stabilization
• Organ volume
• Moving substances through the body
• Heat
• Storage of food

Question 2

what are the properties of muscle tissue

Answer 2

• Electrical excitability
• Contractility
• Extensibility
• Elasticity

Question 3

Smooth muscle features

Answer 3

• Spindle
• Single Nuclei
• Not striated
• Involuntary
• E.g. intestine wall

Question 4

Cardiac muscle features

Answer 4

• Branching
• Single Nuclei
• Visible striations
• Involuntary
• E.g. heart

Question 5

Skeletal muscle features

Answer 5

• Elongated
• Multiple Nuclei
• Visible striations
• Voluntary
• E.g. skeletal muscle

Question 6

Muscle composition

Answer 6

• Water = 75%
• Protein = 20%
• Salts and other substances = 5%

Question 7

Order of the skeletal muscle layers

Answer 7

• Muscle
• Fascicles
• Individual muscle fibres
• Myofibrils
• Actin and myosin (myofilaments)

Question 8

what covers the fascicles?

Answer 8

Perimysium

Question 9

what covers the individual muscle fibres

Answer 9

Endomysium and the sarcolemma

Question 10

What covers the entire muscle

Answer 10

Epimysium

Question 11

What does the sarcoplasmic reticulum store

Answer 11

Ca2+

Question 12

Why does the sarcolemma have T Tubules

Answer 12

Allow the muscle action potential to spread to all parts of the muscle quickly.

Question 13

What is fascia

Answer 13

It is a sheet or band of fibrous connective tissue that surrounds muscles and other organs of the body

Question 14

What are langer’s lines

Answer 14

Skin creases that reflect the fibre orientation of the fascia and muscles that lie below

Question 15

What is the thin filament structure made up of

Answer 15

Actin, troponin and tropomyosin.

Question 16

What is the thick filament made up of

Answer 16

Myosin

Question 17

What does tropomyosin do?

Answer 17

Blocks the ‘binding’ site at rest

Question 18

What does troponin do?

Answer 18

Supporting structure for tropomyosin and changes shape when in contact with a calcium ion therefore the actin and myosin can bind and contract the muscle.

Question 19

What muscle fibre angle produces the most force?

Answer 19

short, slanted fibers therefore large diameter

Question 20

What muscle fibre angle produces the most velocity?

Answer 20

Long, straight fibers therefore small diameter.

Question 21

How many actin filaments surround a myosin filament?

Answer 21

6

Question 22

What axes goes through the belly button?

Answer 22

Sagittal

Question 23

What axes goes through both iliac crests?

Answer 23

Frontal

Question 24

What axes goes through the top of your head downwards?

Answer 24

Longitudinal

Question 25

What is it called when you move your ankle inwards and outwards?

Answer 25

Inversion Eversion

Question 26

Name the layers of the muscles

Answer 26

1- Skeletal muscle 2- Fascicle 3- Muscle Fiber (cell) 4- Myofibril 5- Filament

Question 27

Name the parts of the muscle

Answer 27

1- Satellite cell 2- Sarcolemma 3- Myofibril 4- Sarcoplasm 5- Muscle fibre

Question 28

Name the part of the muscle

Answer 28

1- Terminal cisterns 2- T tubule 3- Mitochondrion 4- Sarcolemma 5- Thick filament 6- Thin filament 7- Myofibril 8- Sarcoplasmic reticulum 9- Myofibrils

Question 29

Name the parts of the muscle

Answer 29

1- T tubule 2- Sarcolemma 3- Thick filament 4-Thin filament 5- Terminal cisterna 6- Sarcoplasmic rectium 7- Triad

Question 30

Name the parts of the muscle

Answer 30

1- Epimysium 2- Perimysium 3- Endomysium 4- Deep fascia

Question 31

Name the parts of the myofibril

Answer 31

1-Actin 2- Troponin 3- Tropomyosin 4- Myosin binding site

Question 32

Name the parts of the myofibril

Answer 32

1. Z discs 2. Thin filament 3. Thick filament 4. M line 5. Thin filament 6. Z disc 7. I band 8. Zone of overlap 9. Sarcomere 10. H zone 11. A band

Question 33

Name the planes of movement

Answer 33

a-Sagittal b- Frontal c- Transverse

Question 34

Name the axes

Answer 34

a- Frontal b- Sagittal c- Longitudinal