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Ana > Ch 9 Lec 1 - Muscles > Flashcards

Ch 9 Lec 1 - Muscles Flashcards

1
Q

study of muscles

A

myology

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2
Q

muscular tissue is blank percent of total body mass

A

45

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3
Q

muscles do most of the blank generated by the body

A

work

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4
Q

three muscle functions

A

maintain posture, movement, heat production, support visceral organs, guard orifices

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5
Q

property of muscle tissue that has the ability to receive and respond to electric or chemical stimuli

A

excitability

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6
Q

property of muscle that is the ability to shorten forcibly when stimulated

A

contractility

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7
Q

property of muscle that has the ability to be stretched without damaging the tissue

A

extensibility

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8
Q

property of muscle tissue that is the ability to return to original shape after being stretched

A

elasticity

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9
Q

four properties of muscle tissue

A

excitability, contractility, extensibility, elasticity

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10
Q

muscles are blank

A

organs

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11
Q

muscle is composed of many types of blank

A

tissue

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12
Q

a muscle fiber equals blank

A

1 muscle cell

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13
Q

skeletal muscle attaches to bone, skin, or blank

A

fascia

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14
Q

skeletal muscle blanks rapidly but blanks easilty

A

contracts, tires

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15
Q

another name for belly

A

gaster

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16
Q

main portion of a muscle

A

gaster

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17
Q

belly is attached to blank

A

tendons

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18
Q

tendons attach blank to blank

A

bone, muscle

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19
Q

fascia that is dense irregular ct around the muscle and holds it in place and separates it from other muscles

A

deep

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20
Q

fascia that is made of loose ct beneath skin, surrounds several muscles

A

subcutaneous

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21
Q

many muscle fibers are bundled together into groups called blank

A

fascicles

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22
Q

several blank make up a muscle

A

fascicle

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23
Q

fascicles have blank to blank fibers

A

10-100

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24
Q

skeletal muscle ct that surrounds the whole muscle

A

epimysium

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25
Q

skeletal muscle ct that surrounds fascicles

A

perimysium

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26
Q

skeletal muscle ct that separates individual muscle fibers

A

endomysium

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27
Q

all connective tissue extend beyond the muscle blank to form the blank

A

belly, tendon

28
Q

tendons may form thick flattened sheets, called blank

A

aponeuroses

29
Q

embryonic cells that fuse to form muscle fibers

A

myoblasts

30
Q

these are the reason that muscles are so long and multinucleated

A

myoblasts

31
Q

myoblasts that do not fuse become blank cells

A

myosatellite

32
Q

these muscle fiber cells assist in repair of damaged cells

A

myosatellite

33
Q

fiber cytoplasm of a muscle fiber

A

sarcoplasm

34
Q

plasma membrane of a muscle fiber

A

sarcolemma

35
Q

extensions of the sarcolemma into the sarcoplasm in muscle fibers

A

transverse tubule

36
Q

contractile organelles that extend the length of a muscle fiber

A

myofibrils

37
Q

myofibrils are surrounded by the blank

A

sarcoplasmic reticulum

38
Q

the functional unit of a myofibril is a blank

A

sarcomere

39
Q

sarcomeres are made of blank filaments and blank filaments

A

thick, thin

40
Q

thick filament that is twisted with globular heads, about 1.6 micrometers long, and there are 500 of them to one thick filament

A

myosin

41
Q

thin filaments are made of blank which is a structural protein and has coiled “beads”

A

actin

42
Q

actin binds with blank because it has an active site

A

myosin

43
Q

two regulatory proteins of actin

A

tropomyosin, troponin

44
Q

the striated bands of filaments are blank

A

sarcomeres

45
Q

entire thick filament range

A

A band

46
Q

only thin filaments

A

I band

47
Q

only thick filaments

A

H bands

48
Q

both filaments are in this zone

A

zone of overlap

49
Q

divide and flank the sarcomere

A

sarcomere lines

50
Q

the end of the sarcomere made of actinin protein and anchor thin filaments

A

z line

51
Q

middle of the sarcomere that stabilizes thick filaments and is a sarcomere line

A

m line

52
Q

diagram a sarcomere

A

ehhh

53
Q

structural protein that anchors a thick filament to a z line and accounts for elasticity and extensibility

A

titin

54
Q

structural protein that holds F actin together on thin filaments

A

nebulin

55
Q

structural protein that makes up the z line

A

actinin

56
Q

during contraction, myosin attaches to binding site of blank

A

actin

57
Q

during contraction, atp causes the myosin to flex and pull on the blank

A

actin

58
Q

the blank filaments slide inward during contraction

A

thin

59
Q

neuron and all muscle cells are stimulated by the neuron in this

A

motor unit

60
Q

three things in neuromuscular junciton

A

motor unit, neuromuscular junction, synaptic terminal

61
Q

point of contact between the neuron and the muscle

A

neuromuscular junction

62
Q

end of axon that contacts motor end plate

A

synaptic terminal

63
Q

three more parts of the neuromuscular junction

A

motor end plate, synaptic cleft, neurotransmitter

64
Q

point on muscle fiber that contacts synaptic terminal

A

motor end plate

65
Q

chemical released into the gap in neuromuscular junction

A

neurotransmitter

66
Q

gap between motor end plates in neuromuscular junction

A

synaptic cleft

67
Q

neurotransmitter involved in neuromuscular junction

A

acetylcholine

Ana (40 decks)

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