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PH 121 Anatomy > MUSCLE TISSUE > Flashcards

MUSCLE TISSUE Flashcards

1
Q

Striated; alternating dark and light bands

A

Striations of skeletal muscle

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2
Q

Multi-nucleated at periphery

A

Is the nucleus of skeletal muscle single or multinucleated? And where it can be found?

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3
Q

Rapid and voluntary

A

What is the contraction of skeletal muscle?

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4
Q

Myofibrils

A

What are the main component of sarcoplasm?

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5
Q

Pushed by the myofibrils

A

Why are the nuclei of the skeletal muscle are at the periphery?

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6
Q

Nonstriated; nonbranching

A

Is the smooth muscle striated or nonstriated? Branching or nonbranching?

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7
Q

Fusiform/ spindle-shaped/ squamous

A

Shape of the cells in smooth muscle

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8
Q

Single and center

A

Smooth muscle

Nucleus: mono/multinucleated? Periphery/center?

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9
Q

Homogenously eosinophilic (red/pink stained)

A

What is the condition of the smooth muscles’ cytoplasm?

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10
Q

Involuntary and slow

A

Contraction of smooth muscle?

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11
Q

Striated; branching

A

Cardiac muscle

Striated/non striated?; branching/nonbranching?

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12
Q

Mononucleated; center

A

Cardiac muscle

Nucleus: multi/mono-nucleated? Center/periphery?

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13
Q

Involuntary and rhythmic

A

What is the contraction of cardiac muscle?

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14
Q

Intercalated disk

A

In cardiac muscle, what makes the cell join together?

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15
Q 
Muscle
Fascicle
Muscle fiber
Myofibrils
Myofilaments
A

Organization of skeletal muscle from macro to microscopic

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16
Q

Dense connective tissue

A

What is the kind of CT that epimysium is made up of?

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17
Q

Surround the muslce

A

What does epimysium covers?

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18
Q

Thin and branching CT

A

What is the CT of the perimysium?

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19
Q

True

A

True/false: In perimysiun there is the presence of blood vessels and nerves

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20
Q

Fascicle

A

What does perimysium surrounds?

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21
Q

Muscle fiber

A

What does endomysium surrounds?

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22
Q

Delicate network of reticular fibers

A

What is the composition of endomysium?

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23
Q

Myofibril

A

It is the main bulk of muscle fiber

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24
Q

A band

A

Dark band of myofibril that consist of alternating thin and thick filaments

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25
Q

False

A

True/false: A band also shortens during contraction

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26
Q

H band

A

Central portion of A band; devoid of thin filaments

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27
Q

M line

A

Bisect H band

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28
Q

I band

A

Light band; devoid of thick filaments

29
Q

I band

A

It is the one that shortens during contraction (myofibril)

30
Q

Z line

A

Bisects I band

31
Q

Center: A band: 2 contiguous I bands one on each side

A

The sarcomere includes centrally located _________ and 2 ________ contiguous __________ one on each side

32
Q

Sarcomere

A

It is the basic contractile unit that is located from one Z line to another Z line

33
Q

M line to Z line

A

The boundary of extension of the titin (from __ line to __ line) - myofibrils

34
Q

Titin

A

It maintains location of A band; responsible for the ability of muscle to back into its resing length after being stretched

35
Q

A bands I bands Z lines

A

These myofibrils are the only ones that can be seen under LM

36
Q

Sarcolemma

A

Plasma membrane of the muscle

37
Q

External lamina

A

What is the coating of the external surface of sarcolemma

38
Q

Dystrophin

A

It is the coating of the inner layer of sarcolemma that prevent muscle cells from being stressed due to continuous stretching

39
Q

Muscular dystrophy

A

A hereditary disease caused by a defect in the gene for dystrophin

40
Q

Males (9-13 years)

A

Who are affected by the muscle dystrophy?

41
Q

Satellite cells/myosatellite cells

A

Precursors of skeletal muscle cell that is found underneath the sarcolemma

42
Q

External lamina

A

What should be kept intact for the continuous regeneration of satellite cell?

43
Q

Mitochondria

A

What is the organelle that is called sarcosome in muscle tissue?

44
Q

Sarcoplasm

A

It contains glycogen granules and myoglobin

45
Q

Glycogen granules

A

It contains the energy needed for muscle contraction

46
Q

Myofibrils

A

Oxygen binding protein of skeletal muscle tissue that gives its brown color

47
Q

Sarcoplasmic reticulum

A

A site for sequestering calcium during muscle relaxation

48
Q

False

A

True/false: there is the presence of ribosomes in sarcoplasmix reticulum

49
Q

Terminal cisterna

A

Found at A-I junction that contains calsequestrin

50
Q

Calsequestrin

A

Protein that sequesters Calcium

51
Q

T-tubule

A

Found at each pair of terminal cisterna that is a tubular invagination of the sarcolemma extending inward from the surface of the fiber

52
Q

T-tubule

A

It is the passageway of action potentials from sarcolemma

53
Q

Triad

A

2 parallel terminal cisterna + T-tubule is called?

54
Q

Two triads

A

Each sarcomere is composed of how many triad?

55
Q

It aids in muscle contraction

A

Function of triad

56
Q

False - it is the only thick filament

A

True or false: Myosin is a thin filament

57
Q

Myosin

A

A protein that is a major component of the A band

58
Q

Heavy meromyosin

Light meromyosin

A

These two results from the division of myosin due to enzymatic cleavage

59
Q

Heavy meromyosin

A

It comprises the head and forms the cross bridge (Myosin)

60
Q

Cross bridging

A

It happens when the head goes toward actin when muscle contracts

61
Q

False

A

True/false: Crossbridge is found in H band

62
Q

Light meromyosin

A

It comprise the tail of the myosin

63
Q

Actin
Tropomyosin
Troponin

A

Proteins that composed the thin filaments of myofilament

64
Q

Actin

A

Protein that is the main component of I band

65
Q

Polymerization of G-actin

A

This process results to one strand of actin

66
Q

F-actin

A

It is a two stranded actin (2 helically entwined strands)

67
Q

G-actin

A

It is the binding site of myosin to actin are located

68
Q

Sssss

A

Sffss

PH 121 Anatomy (2 decks)

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