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PE - Becks > Muscle fiber characteristics > Flashcards

Muscle fiber characteristics Flashcards

(59 cards)

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1
Q

What are the three main types of muscle fibers ?

A

Type 1 - slow oxidative ( slow twitch )
Type 2 a - Fast oxidative glycotic
Type 2 x - fast glycolytic

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2
Q

small fiber diameter

A

Type 1 - slow oxidative ( slow twitch )

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3
Q

10 - 80 fibers per motor unit

A

Type 1 - slow oxidative ( slow twitch )

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4
Q

very high myglobin content

A

Type 1 - slow oxidative ( slow twitch )

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5
Q

very high capillary density

A

Type 1 - slow oxidative ( slow twitch )

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6
Q

very high mitochondrial density

A

Type 1 - slow oxidative ( slow twitch )

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7
Q

Low myosin ATP activity

A

Type 1 - slow oxidative ( slow twitch )

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8
Q

medium fiber diameter

A

Type 2 a - Fast oxidative glycotic

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9
Q

300 - 800 fibers per motor unit

A

Type 2 a - Fast oxidative glycotic
Type 2 x - fast glycolytic

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10
Q

high myglobin content

A

Type 2 a - Fast oxidative glycotic

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11
Q

midway capillary density

A

Type 2 a - Fast oxidative glycotic

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12
Q

midway mitochondrial density

A

Type 2 a - Fast oxidative glycotic

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13
Q

high myosin ATP activity

A

Type 2 a - Fast oxidative glycotic

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14
Q

Large fiber diameter

A

Type 2 x - fast glycolytic

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15
Q

low myglobin content

A

Type 2 x - fast glycolytic

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16
Q

n / a capillary density

A

Type 2 x - fast glycolytic

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17
Q

very high myosin ATP activity

A

Type 2 x - fast glycolytic

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18
Q

low glycotic enzyme ativity

A

Type 1 - slow oxidative ( slow twitch )

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19
Q

high oxidative enzyme activity

A

Type 1 - slow oxidative ( slow twitch )

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20
Q

first recruitment order

A

Type 1 - slow oxidative ( slow twitch )

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21
Q

low force produced

A

Type 1 - slow oxidative ( slow twitch )

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22
Q

Long contractile time

A

Type 1 - slow oxidative ( slow twitch )

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23
Q

high fatiuge resistance

A

Type 1 - slow oxidative ( slow twitch )

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24
Q

high aerobic capacity

Study These Flashcards
A

Type 1 - slow oxidative ( slow twitch )

25
low anaerobic capacity
Type 1 - slow oxidative ( slow twitch )
26
High glycotic enzyme activity
Type 2 a - Fast oxidative glycotic
27
midway oxidative enzyme activity
Type 2 a - Fast oxidative glycotic
28
second in the recruitment order
Type 2 a - Fast oxidative glycotic
29
high force produced
Type 2 a - Fast oxidative glycotic
30
midway contractile time
Type 2 a - Fast oxidative glycotic
31
Moderate fatiuge resistance
Type 2 a - Fast oxidative glycotic
32
moderate aerobic capacity
Type 2 a - Fast oxidative glycotic
33
high anerobic capacity
Type 2 a - Fast oxidative glycotic
34
very high glycotic enzyme activity
Type 2 x - fast glycolytic
35
low oxidative enzyme activity
Type 2 x - fast glycolytic
36
Third in the recruitment order
Type 2 x - fast glycolytic
37
very high force produced
Type 2 x - fast glycolytic
38
short contractile time
Type 2 x - fast glycolytic
39
low fatiuge resistance
Type 2 x - fast glycolytic
40
low aerobic capacity
Type 2 x - fast glycolytic
41
very high anaerobic capacity
Type 2 x - fast glycolytic
42
Endurance based activity
Type 1 slow oxidative ( slow twitch )
43
Running / sprinting ( 1500 m )
Type 2 a - fast oxidative glycotic
44
High intensity, rapid activity, powerlifting
Type 2 x - fast glycotic
45
Hypertrophy
when a muscle becomes bigger and stronger
46
What is a motor unit ?
consists of a motor neurone and its muscle fibers
47
What are motor neurones ?
Nerve cells which transmit the brains instructions as electrical impulses to the muscles.
48
what is the neuromuscular junction ?
where the motor neurone and the muscle fibre meet.
49
muscle fibers are grouped into .....
motor units
50
What is the all or none law ?
Where a sequence of impulses has to be of sufficient intensity to stimulate all of the muscle fibers in a motor unit in order for them to all contract. If not non of them contract.
51
Wht are the two types of motor units
- slow twitch - fast twitch
52
For a long distance swim what type of motor unit willthe brain recruit ?
- slow twitch
53
For a 30 meter sprint what type of motor unit will the brain recruit ?
- fast twitch
54
What happens during wave summation ?
- frequency of stimuli increases - tension in muscle increases - each time the nerve impulse reaches the muscle cell, calcium is released. ( calcium needs to be present for the muscle to contract ) - Repeated nerve impulses with no time to relax causes a build up in calcium. - this helps produce a more forcefull contraction / movement. ( tetanic contraction )
55
What is a tetanic contraction ?
A sustained muscle contraction caused by a series of fast repeating stimuli.
56
What is spatial summation ?
When the strength of a contraction changes by altering the number and size of the muscles motor units.
57
What are muscle spindles ?
These are proprioceptors that detect how fr and fast a muscle is being stretched and produce a stretch reflex.
58
What are gulgi tendons ?
proprioceptors that detect tension im muscle and send a signal to the brain which allows the agonist muscle to relax and lengthen. This happens in isometric contractions.
59
What is autogenic inhibition ?
where there is a sudden relaxation of the muscle in response to high tension. The receptors involved in this process are golgi tendon organs.

PE - Becks (5 decks)

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