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Basic Tissues > Muscle > Flashcards

Muscle Flashcards

1
Q

Skeletal muscle

A

Voluntary; striated

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2
Q

Cardiac muscle

A

involuntary; striated

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3
Q

Smooth muscles

A

no striations; involuntary

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4
Q

Sarcolemma

A

cell membrane

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5
Q

Sarcoplasm

A

cytoplasm

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6
Q

sarcosomes

A

mitochondria

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7
Q

Myofibrils

A

contractile elements

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8
Q

Muscle attached to skeleton via

A

tendon

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9
Q

Epimysium

A

dense CT around muscle

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10
Q

Perimysium

A

dense CT around fascicle

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11
Q

Endomysium

A

delicate CT around fiber (cell)

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12
Q

Skeletal muscle

A

needs a lot of vascular supply

has satellite cells

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13
Q

Satellite cells

A

source of stem cells in adult muscle that can repair damage– why lift less weights when older

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14
Q

When lifting weights satellite cells

A

proliferate

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15
Q

A band

A

anisotropic, dark band, myosin

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16
Q

I band

A

isotropic, light band, actin

17
Q

Z line

A

in the center of the I band, sarcomere is from Z line to Z line

18
Q

H zone

A

middle of A band

19
Q

M band

A

in the middle of the H zone

20
Q

F actin

A

filaments of actin embedded in the Z line

21
Q

Tropomyosin

A

filamentous protein that fills the grove in F actin and binds Troponin

22
Q

Subunits of troponic

A

TnT- binds tropomyosin
TnC- binds calcium
TnI- inhibits actin-myosin interaction

23
Q

Desmin

A

intermediate filament located in muscle

24
Q

TITIN

A

binds in the Z line and runs to the M line and associated w/ M line proteins and parter from the other size
Provents hyper stretching because of spring like coiling

25
Q

Action potential coming down and comes to axon terminal

A

Has a fusion of synaptic vesicles that contain ACH. ACH binds to ACH receptor and opens up Na/K channel and has action potential contraction

Cant have this going on all the time so.. ACH is also being bound to acetylcholinesterase which breaks down ACH

26
Q

Drooping eyelids (ptosis)

A

levator palpeerde superioris CNII

27
Q

Double vision (diplopia)

A

extra ocular muscles; CN III, IV, VI

Basic Tissues (11 decks)

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