VII - Muscle Flashcards Preview

Histology > VII - Muscle > Flashcards

Flashcards in VII - Muscle Deck (129)
1

Muscle: cytoplasm

sarcoplasm

2

Muscle: SER

sarcoplasmic reticulum

3

Muscle: cell membrane and external lamina

sarcolemma

4

Muscle Fibers: slow, oxidative, red

Type I

5

Muscle Fibers: fast, oxidative, glycolytic, red

Type IIa

6

Muscle Fibers: fast, glycolytic, white

Type IIb

7

Type I Muscle Fibers: mitochondria

numerous

8

Type I Muscle Fibers: capillaries

numerous

9

Type I Muscle Fibers: diameter

small

10

Type I Muscle Fibers: motor unit size

small

11

Type I Muscle Fibers: myoglobin content

high

12

Type I Muscle Fibers: glycogen content

low

13

Type I Muscle Fibers: generation of ATP

oxidative phosphorylation

14

Type I Muscle Fibers: glycolytic enzymes

low

15

Type I Muscle Fibers: rate of fatigue

slow

16

Type I Muscle Fibers: myosin-ATPase activity

low

17

Type I Muscle Fibers: speed of contraction

slow

18

Type I Muscle Fibers: location

postural muscles of the back

19

Type IIa Muscle Fibers: mitochondria

numerous

20

Type IIa Muscle Fibers: capillaries

numerous

21

Type IIa Muscle Fibers: diameter

intermediate

22

Type IIa Muscle Fibers: motor unit size

intermediate

23

Type IIa Muscle Fibers: myoglobim content

high

24

Type IIa Muscle Fibers: glycogen content

intermediate

25

Type IIa Muscle Fibers: generation of ATP

oxidative phosphorylation

26

Type IIa Muscle Fibers: glycolytic enzymes

intermediate

27

Type IIa Muscle Fibers: rate of fatigue

intermediate

28

Type IIa Muscle Fibers: myosin-ATPase activity

high

29

Type IIa Muscle Fibers: speed of contraction

fast

30

Type IIa Muscle Fibers: location

major muscles of legs

31

Type IIb Muscle Fibers: mitochondria

sparse

32

Type IIb Muscle Fibers: capillaries

sparse

33

Type IIb Muscle Fibers: diameter

large

34

Type IIb Muscle Fibers: motor unit size

large

35

Type IIb Muscle Fibers: myoglobin content

low

36

Type IIb Muscle Fibers: glycogen content

high

37

Type IIb Muscle Fibers: generation of ATP

anaerobic glycolysis

38

Type IIb Muscle Fibers: glycolytic enzymes

high

39

Type IIb Muscle Fibers: rate of fatigue

fast

40

Type IIb Muscle Fibers: myosin-ATPase activity

high

41

Type IIb Muscle Fibers: speed of contraction

fast

42

Type IIb Muscle Fibers: location

extraocular muscles

43

Skeletal Muscle: skeletal attachment

present

44

Skeletal Muscle: fiber shape

cylindrical

45

Skeletal Muscle: fiber diameter

10-100μm

46

Skeletal Muscle: mitochondria

few (2%)

47

Skeletal Muscle: functional syncitium

none

48

Skeletal Muscle: nucleus

multiple, peripheral

49

Skeletal Muscle: sarcomere (striation)

regular

50

Skeletal Muscle: T-tubules

center of triads at A-I junctions

51

Cardiac Muscle: skeletal attachment

none

52

Cardiac Muscle: fiber shape

cylindrical, branches

53

Cardiac Muscle: fiber diameter

10-20μm

54

Cardiac Muscle: mitochondria

many (40%)

55

Cardiac Muscle: functional syncitium

present

56

Cardiac Muscle: nucleus

one or two, central

57

Cardiac Muscle: sarcomere (striation)

regular

58

Cardiac Muscle: T-tubules

diads at Z dics

59

Smooth Muscle: skeletal attachment

none

60

Smooth Muscle: fiber shape

fusiform

61

Smooth Muscle: fiber diameter

0.2-10μm

62

Smooth Muscle: mitochondria

less

63

Smooth Muscle: functional syncitium

presemt

64

Smooth Muscle: nucleus

single, central at the widest part of the cell

65

Smooth Muscle: sarcomere (striation)

none

66

Smooth Muscle: T-tubules

none, caveolae may be functionally similar

67

Skeletal Muscle: actin attachment

Z line

68

Skeletal Muscle: Ca binding protein

troponin

69

Skeletal Muscle: response to stimulus

graded by recruitment

70

Skeletal Muscle: excitability

nerve supply (motor)

71

Skeletal Muscle: electrical coupling

none

72

Skeletal Muscle: sensitivity to extracellular Ca

none

73

Skeletal Muscle: regeneration

limited

74

Skeletal Muscle: pacemaker potential

none

75

Skeletal Muscle: major locations

skeletal muscle, tongue, diaphragm, eyes, upper esophagus

76

Cardiac Muscle: actin attachment

Z line

77

Cardiac Muscle: Ca binding protein

troponin

78

Cardiac Muscle: response to stimulus

all or none electrical syncitium

79

Cardiac Muscle: excitability

intrinsic (autonomic)

80

Cardiac Muscle: electrical coupling

intercalated disc and gap junctions

81

Cardiac Muscle: sensitivity to extracellular Ca

present

82

Cardiac Muscle: regeneration

very poor

83

Cardiac Muscle: pacemaker potential

present

84

Cardiac Muscle: major locations

heart

85

Smooth Muscle: actin attachment

dense bodies

86

Smooth Muscle: Ca binding protein

calmodulin

87

Smooth Muscle: response to stimulus

partial, slow, spontaneous, wave-like, rhythmic

88

Smooth Muscle: excitability

intrinsic (autonomic)

89

Smooth Muscle: electrical coupling

gap junctions

90

Smooth Muscle: sensitivity to extracellular Ca

present

91

regeneration

good

92

Smooth Muscle: pacemaker potential

present

93

Smooth Muscle: major locations

blood vessels, digestive and respiratory tracts, uterus, bladder

94

Pacemaker of cardiac muscles

SA node

95

Pacemaker of smooth muscles in GI tract

interstitial cells of Cajal

96

Vessel supplying the SA node

R coronary artery

97

Endoplasmic reticulum in muscles

sarcoplasmic reticulum

98

Ca voltage sensor receptors in the tubular membrane

dihydropyridine receptors

99

Ca-channel blocker that acts on dihydropyridine receptors

Nifedipine

100

Ca-release channels in the sarcoplasmic reticulum

Ryanodine Ca Release Channels

101

Part of sarcoplasmic reticulum where Ca is stored

terminal cisternae

102

Does not shorten in contraction

A band

103

Sarcomere: thin filaments only

I band

104

Sarcomere: thick filaments only

H band

105

Sarcomere: mostly thick filaments with thin filaments in between

A band

106

Sarcomere: structural protein of thin filaments

actin

107

Sarcomere: structural protein of thick filaments

myosin

108

Sarcomere: supporting protein that binds to tropomyosin

Trop T

109

Sarcomere: supporting protein that binds Ca ions

Trop C

110

Sarcomere: supporting protein that inhibits actin-myosin interaction

Trop I

111

Sarcomere: contains ATPase activity

myosin

112

Muscle Striations: thick and thin filaments, dark band

A band

113

Muscle Striations: thin myofilaments, light band

I band

114

Muscle Striations: bisects the A band, thick filaments only, dark band

H band/zone

115

Muscle Striations: bisects the I band

Z disk

116

Delimits Sarcomeres

distance between 2 Z disks

117

Muscle Striations: bisects A band, absolute middle of a sarcomere

M line

118

A Band: Contraction

no change

119

A Band: Stretching

no change

120

I Band: Contraction

shortens

121

I Band: Stretching

lengthens

122

H Band: Contraction

shortens

123

H Band: Stretching

lengthens

124

Z Discs: Contraction

moves closer together

125

Z Discs: Stretching

moves further apart

126

M Line: Contraction

shortens

127

M Line: Stretching

lengthens

128

Substance release by damaged muscle fibers into the bloodstream causes renal failure and possible death

myoglobin

129

Process of muscle breakdown

rhabdomyolysis