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MLS 111L > Muscular System > Flashcards

Muscular System Flashcards

1
Q

which type of muscle is not striated

A

smooth muscles

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2
Q

which muscle cell has the largest fiber diameter

A

skeletal muscle

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3
Q

which is the only muscle cell without a centrally located nuclei

A

skeletal muscle

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4
Q

which has the largest amount of sarcoplasmic reticulum

A

skeletal muscle

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5
Q

which muscle cell has no transverse tubules

A

smooth muscle

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6
Q

which muscle has transverse tubule aligned with z disc

A

cardiac muscle

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7
Q

which type of muscle has cell junctions

A

cardiac muscles

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8
Q

what muscle has endomysium, perimysium and epimysium as connective tissue component

A

skeletal muscle

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9
Q

what are the connective tissue components of cardiac muscles

A

endomysium and perimysium

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10
Q

what is the connective tissue component of smooth muscles

A

endomysium

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11
Q

which muscle tissues are striated

A

cardiac and skeletal tissue

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12
Q

which mucle cell has many nuclei

A

skeletal muscle

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13
Q

which muscle tissue contract voluntarily

A

skeletal muscle

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14
Q

what are striations

A

alternating dark and light bands

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15
Q

refers to the self induced impulse of the cardiac muscles

A

auto rhythmicity

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16
Q

connective tissue which is the outermost layer of the muscle, present only in skeletal muscle

A

epimysium

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17
Q

connective tissue that surrounds groups of 10 to 100 or more muscle fibers separating them into bundles

A

perimysium

18
Q

a bundle of 10-100 muscle fibers separated by perimysium

A

fascicles

19
Q

a thin sheath of areolar connective tissue that penetrates the interior of each fascicle and separates individual muscle fibers from one another, present in all muscles

A

endomysium

20
Q

a cord of dense regular connective tissue composed of parallel bundles of collagen fibers that attach a muscle to the periosteum of a bone

A

tendon

21
Q

the plasma membrane of a muscle fiber

A

sarcolemma

22
Q

cytoplasm of a muscle fiber

A

sarcoplasm

23
Q

continually pumps Calcium ions from the sarcoplasm and stores it within its sacs

A

sarcoplasmic reticulum

24
Q

allow electrical signals or impulses to move deeper into the cell

A

T tubules

25
Q

produces ATP and is most numerous in skeletal muscle tissue

A

mitochondria

26
Q

contains thousands of thick and thin myofilaments that extend lengthwise along the skeletal muscle fibers and almost all fill their sarcoplasm

A

myofibrils

27
Q

thick filament

A

myosin

28
Q

thin filaments

A

actin, tropomyosin and troponin

29
Q

when myosin heads bridge the gap between adjacent myofilaments, they are called

A

cross bridges

30
Q

basic contractile unit of the muscle cell

A

sarcomere

31
Q

narrow plate-shaped regions of dense materials that separate one sarcomere from the next

A

Z discs

32
Q

the region in the center of H zone that contains proteins that hold thick filaments together at the center of the sarcomere

A

M Line

33
Q

the segment that runs the entire length of the thick filament, and includes parts of thin filament that overlap thick filament

A

A band

34
Q

the segment that includes the Z line and the ends of the thin filaments where they do not overlap the thick filaments

A

I band

35
Q

narrow region in the center of each A band that contains thick filaments but no thin filaments

A

H Zone

36
Q

stabilizes the position of the thick filament and can stretch and spring back due to its size

A

titin

37
Q

structural protein that attaches to actin molecules of thin filaments

A

a actinin

38
Q

form the m line of the sarcomere, binds to titin

A

myomesin

39
Q

long non elastic protein wrapped around each thin filament

A

nebulin

40
Q

anchors the muscle fibers to the surrounding matrix, holds the actin filaments to the sarcolemma

A

dystotrophin

MLS 111L (10 decks)

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