DMD - L1 Flashcards Preview

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Flashcards in DMD - L1 Deck (12)
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1
Q

Topics?

A

Muscle structure
Muscle function
Metabolism
Types of muscle fibre

2
Q

Describe the structure of muscle

A

-

3
Q

Describe the structure of sarcomeres

A

HIMAZ

4
Q

Explain the sliding filament theory

A

-

5
Q

Explain the cross-bridge cycle

A

-

6
Q

What is dystrophin?

A

-

7
Q

Where can ATP be obtained from?

A

within the fibre
creatine phosphate
glucose in the cell (as glycogen)
glucose & fatty acids from blood

8
Q

Describe aerobic and anaerobic respiration

A

-

9
Q

Describe the energy source graph

A

-

10
Q

Type I muscle fibres?

A

red fibres, slow oxidative, slow twitch, fatigue resistant
contain:
large amount of myoglobin, many mitochondria
many blood capillaries
generate A TP aerobically (oxidative)
split ATP at a slow rate
slow contraction velocity, resistant to fatigue
found in large numbers in postural muscles
needed for aerobic activities like long distance running

11
Q

Type IIA muscle fibres?

A

red fibres, fast oxidative, fast twitch, fatigue resistant
contain:
large amount of myoglobin, many mitochondria, many capillaries
high capacity for generating ATP by oxidation. Split ATP at a very rapid rate, hence, high contraction velocity o resistant to fatigue but not as much as slow oxidative fibres
needed for middle distance running and swimming

12
Q

Type IIB muscle fibres?

A

white fibres, fast glycolytic, fast twitch
• contain:
o low myoglobin content, few mitochondria, few capillaries
o large amount of glycogen, split ATP very quickly, anaerobic glycolysis o fatigue easily
o needed for explosive sports like sprinting