Muscle slide Q's Flashcards

(34 cards)

1
Q

What are the functions of muscle tissue

A
  • Movement
  • Stabilization
  • Organ volume
  • Moving substances through the body
  • Heat
  • Storage of food
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2
Q

what are the properties of muscle tissue

A
  • Electrical excitability
  • Contractility
  • Extensibility
  • Elasticity
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3
Q

Smooth muscle features

A
  • Spindle
  • Single Nuclei
  • Not striated
  • Involuntary
  • E.g. intestine wall
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4
Q

Cardiac muscle features

A
  • Branching
  • Single Nuclei
  • Visible striations
  • Involuntary
  • E.g. heart
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5
Q

Skeletal muscle features

A
  • Elongated
  • Multiple Nuclei
  • Visible striations
  • Voluntary
  • E.g. skeletal muscle
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6
Q

Muscle composition

A
  • Water = 75%
  • Protein = 20%
  • Salts and other substances = 5%
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7
Q

Order of the skeletal muscle layers

A
  • Muscle
  • Fascicles
  • Individual muscle fibres
  • Myofibrils
  • Actin and myosin (myofilaments)
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8
Q

what covers the fascicles?

A

Perimysium

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9
Q

what covers the individual muscle fibres

A

Endomysium and the sarcolemma

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10
Q

What covers the entire muscle

A

Epimysium

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11
Q

What does the sarcoplasmic reticulum store

A

Ca2+

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12
Q

Why does the sarcolemma have T Tubules

A

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

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13
Q

What is fascia

A

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

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14
Q

What are langer’s lines

A

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

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15
Q

What is the thin filament structure made up of

A

Actin, troponin and tropomyosin.

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16
Q

What is the thick filament made up of

17
Q

What does tropomyosin do?

A

Blocks the ‘binding’ site at rest

18
Q

What does troponin do?

A

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.

19
Q

What muscle fibre angle produces the most force?

A

short, slanted fibers therefore large diameter

20
Q

What muscle fibre angle produces the most velocity?

A

Long, straight fibers therefore small diameter.

21
Q

How many actin filaments surround a myosin filament?

22
Q

What axes goes through the belly button?

23
Q

What axes goes through both iliac crests?

24
Q

What axes goes through the top of your head downwards?

25
What is it called when you move your ankle inwards and outwards?
Inversion Eversion
26
Name the layers of the muscles
1- Skeletal muscle 2- Fascicle 3- Muscle Fiber (cell) 4- Myofibril 5- Filament
27
Name the parts of the muscle
1- Satellite cell 2- Sarcolemma 3- Myofibril 4- Sarcoplasm 5- Muscle fibre
28
Name the part of the muscle
1- Terminal cisterns 2- T tubule 3- Mitochondrion 4- Sarcolemma 5- Thick filament 6- Thin filament 7- Myofibril 8- Sarcoplasmic reticulum 9- Myofibrils
29
Name the parts of the muscle
1- T tubule 2- Sarcolemma 3- Thick filament 4-Thin filament 5- Terminal cisterna 6- Sarcoplasmic rectium 7- Triad
30
Name the parts of the muscle
1- Epimysium 2- Perimysium 3- Endomysium 4- Deep fascia
31
Name the parts of the myofibril
1-Actin 2- Troponin 3- Tropomyosin 4- Myosin binding site
32
Name the parts of the myofibril
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
33
Name the planes of movement
a-Sagittal b- Frontal c- Transverse
34
Name the axes
a- Frontal b- Sagittal c- Longitudinal