chapter 10 Flashcards

1
Q

skeletal muscles are referred to as

A

muscle fibers

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2
Q

Fascicles

A

bundles of muscle
fibers

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3
Q

three layers of connective tissue occur within

A

endomysium, perimysium and epimysium

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4
Q

endomysium

A

innermost
delicate
areolar surrounds and electrically insulates each muscle fiber

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5
Q

perimysium

A

sounds the fascicles
dense irregular connective tissue
blood vessels nad nerves

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6
Q

Epimysium

A

dense irregular
surrounds the whole skeletal muscle

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7
Q

deep facia

A

dense irregular tissue
separates individual muscles
binds together muslces
forms sheath
fills space between muslces

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8
Q

flat sheet formed from a tendon

A

aponeurosis

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9
Q

less mobile attachment

A

origin

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10
Q

more mobile attachted

A

insertion

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11
Q

2 main structures are unique to muscle fibers

A

t- tubules and sarcoplasmic retticulum

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12
Q

cytoplasm of muscle fiber

A

sarcoplasm

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13
Q

satelite cells fuse with damaged muscle fiber and assist in repair and regeneration

A

skeltal muslce injured

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14
Q

80& of volume of a muscle fiber is composed of long cylindrical structures

A

myofibrils

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15
Q

sacromere

A

functional contractile of a skeletal muscle fiber

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16
Q

tropomyosin and troponin are what

A

thin flagments

17
Q

each spherical moleclue

A

g actin

18
Q

fligament composed of a strand of g actin molecule is called

A

f actin

19
Q

sacromere

A

composed of thick and thin
distance between two adjacents z disc

20
Q

I bands

A

Extend from both directions of a z disc
light band containing thin f
only connection proteins

21
Q

m line

A

thin
dark protein dics
center of H zone here thick f attach

22
Q

H zone

A

lighter region
middle of a band
think f only

23
Q

A band

A

Dark band middle of sarcomere
entire thick f

24
Q

cardiac

A

uninucleate cells
branching , striated

25
Q

smooth

A

spindle shaped
central nuclei
no striations
involuntary

26
Q

skeletal

A

-Elonated cells
-multiple peripheral nuclei
-visible striations
- voluntary

27
Q

cardiac

A

branching cell
single central nervous nucleus
visible striations
involuntary

28
Q

smooth muscle

A

spindle - shaped cells
single central nucleus
lack visible striations
involuntary

29
Q

myofibril

A

cylindrical bundle of myofilaments
gives skeletal muscle its stripes

30
Q

myofilament

A

ultramicroscopic threadlike structure made up of various protein molecules

31
Q

thin m

A

main protein is actin
held together by z lines
t&t

32
Q

thick m

A

main protein myosin
held together at middle by m line

33
Q

tendon, muscle, fascicle, epimysium

A

muscle structure
covered by epimysium

34
Q

perimysium,part of a fascicle

A

Fascicle
surrounded by perimysium

35
Q

surround by endomysium

A

muscle fiber

36
Q

vary in size, speed of contraction, amount of force , endurance

A

fiber types

37
Q

dark red
good aerobic metabolism
low force

A

slow oxidative

38
Q

big
fast contracting
pale white
high force

A

Fast glycolytic

39
Q

fast contracting
somewhat fatigue
medium force
between intermediate

A

fast oxidative