Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

CSCS > Muscular System > Flashcards

Muscular System Flashcards

1
Q

Continuous with tendon which is attached to bone

A

Epimysium

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Origin

A

Proximal attachment

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Insertion

A

Distal attachment

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Bundles of muscle fibers

A

Fasiculi

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Connective tissue around fasiculi

A

Perimysium

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Connective tissue around each fiber. Continuous with sarcolemma

A

Endomysium

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Junction between motor neuron and muscle fibers it innervates

A

NMJ

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Each cell has this many NMJ, but

A

One, single motor neuron can innervate many fibers

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Motor neuron and fibers it innervates

A

Motor unit

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Contains contractile components, glycogen, fat, enzymes, mitochondria, SR

A

Sarcoplasm

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Contain contractile Apparatus

A

Myofibrils

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Thick, has cross bridges

A

Myosin

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Thin, two strands in double helix

A

Actin

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Smallest contractile unit of skmm

A

Sarcomere

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

CENTER of sarcomere. Myosin anchor

A

m bridge

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

ENDS of sarcomere. Actin anchor

A

z line

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

DARK. alignment of myosin

A

a band

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

LIGHT. Only actin. Z line in middle

A

I band

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

CENTER. M bridge in middle, only myosin

A

H zone

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

These decrease during contraction…

A

H zone and I band

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

Intricate system of tubules parallel to each myofibril

A

Sarcoplasmic reticulum

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

SR terminates as…

A

Vesicles near z lines

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

Calcium stored in…

A

Vesicles of SR

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

In SR, this controls contraction…

A

Regulation of calcium

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
Q

Run perpendicular to SR and terminate near z lines between two vesicles

A

T tubules

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
26
Q

T tubules are continuous with…

A

Sarcolemma at surface

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
27
Q

Discharge of AP arrives nearly…

A

Simultaneously from surface to all depths

28
Q

States that actin slide inward on myosin, pulling z lines to center

A

Sliding filament theory

29
Q

Causes movement during SFT

A

Flexion of cross bridges on actin

30
Q

How must flexions occur

A

Very rapid and repeated

31
Q

Phases of SFT. 5

A

Resting, excitation contraction coupling, contraction,recharge, relaxation

32
Q

Little Calcium present, few bound cross bridges, no tension

A

Resting

33
Q

SR stimulated to release calcium during

A

Excitation contraction coupling

34
Q

Calcium binds with

A

Troponin

35
Q

During contraction, energy comes from

A

Hydrolysis of ATP to ADP

36
Q

Another ATP must replace ADP in order…

A

For cross bridge head to detach and recock

37
Q

If calcium is present..

A

Continuation of contraction. Relaxation if not present

38
Q

Recharge continues as long as there is…

A

Calcium, ATP, and myosin ATPase

39
Q

Relaxation occurs when…

A

Motor nerve isn’t stimulated and calcium is pumped back into SR.

40
Q

All fibers simultaneously activated when…

A

Motor neuron fires impulse

41
Q

Extent of control of muscle depends on…

A

Number of fibers within each motor unit

42
Q

Action potential is NOT…

A

Capable of directly exciting fibers

43
Q

AP causes chemical transmission and release of

A

Acetylcholine

44
Q

All fibers in motor unit contract and develop force at same time

A

All or none principle

45
Q

Short period of activation is called

A

Twitch

46
Q

Force summates if..

A

A second twitch elicited before complete relaxation

47
Q

Twitches merge and fuse..

A

Tetanus

48
Q

Maximal amount of force a motor unit can develop

A

Tetanus

49
Q

Fast twitch motor unit

A

Type ii

50
Q

Slow twitch motor unit

A

Type I

51
Q

Type ii twitch time..

A

Short

52
Q

Type I twitch time..

A

Long

53
Q

Type I Are..

A

Efficient, fatigue resistant, aerobic

54
Q

Type ii Are…

A

Inefficient, fatiguable, anaerobic

55
Q

Muscular force graded in two ways…

A

Variation in frequency. Recruitment

56
Q

Variation in frequency is…

A

As frequency increases, forces summate, force increases

57
Q

Recruitment

A

Varying number of activated motor units

58
Q

Maximal force production does not occur early in ROM if muscle is unloaded prior to muscle action

A

Preloading

59
Q

Recruitment patterns will vary depending on…

A

Joint position

60
Q

Preloading is important for…

A

Developing strength early in ROM, especially at high velocities

61
Q

Specialized sensory receptors in joints, muscles, tendons

A

Proprioceptors

62
Q

Job of proprioceptors…

A

Relay information about muscle dynamics to CNS

63
Q

Muscle length and rate of change

A

Spindles

64
Q

Spindles indicate..

A

Degree to which muscle must be activated in order to overcome a given resistance

65
Q

LocAted in tendons near myotendinous junctions

A

GTOs

66
Q

GTOs activated when

A

Tendon is stretched

67
Q

Neural input from GTOs…

A

Inhibits muscle activation. Protects against excessive tension

CSCS (14 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions