Muscle at Medical Academy In Warszawa | Flashcards & Summaries

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_____ cells are also located on the muscle's cells surface on shallow depressions. describe these cells?

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satellite cells/myogenic stem cells

regenerative cells 

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what are t tubules?

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skeletal muscle membrane is that it is continued within the skeletal muscle fiber as numerous long, tubular invaginations resembling tunnels that intertwine among the myofibrils called T tubules

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location of T/transverse tubules?

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plane of the junction of the A and I bands

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what is a triad in the muscle? main function?

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T tubule flanked by 2 terminal cisternae of sarcoplasmic reticulum

allows depolarization wave to spread

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myofibrils are held in register with one another by __________ intermediate filament?

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desmin-postnatal

vimentin-embryo

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how is desmin attached to the Z lines of sarcomeres?

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plectin

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which protein ensures the protection of the bond between desmin and the Z line?

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αβ- crystallin

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what are costameres?

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The peripheral-most bundles of myofibrils located just adjacent to the sarcolemma are tethered by desmin

of the sarcolemma, filaments to specific locations on the cytoplasmic aspect known as costameres 

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costameres are rich in which protein complex?

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dystrophin-associated glycoprotein complex

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proteins in dystrophin-associated glycoprotein complex?

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dystrophin, dystroglycan complex, sarcoglycan complex, dystrobrevin, syntrophin

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describe dystrophin and its attachments. its function?

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  • one end is attached to the actin filaments of the cytoskeleton adjacent to the sarcolemma, whereas the other end is attached to dystrobrevins, to the β subunit of the dystroglycan molecule, and to syntrophins 
  • protects the sarcolemma from injury during
    muscle contraction
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what kind of tissue forms epimysium, perimysium and endomysium?

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epi-dense irregular collagenous tissue

peri-less dense collagenous connective tissue derived from epimysium

endo-reticular fibers and external lamina/basal lamina

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Q:

_____ cells are also located on the muscle's cells surface on shallow depressions. describe these cells?

A:

satellite cells/myogenic stem cells

regenerative cells 

Q:

what are t tubules?

A:

skeletal muscle membrane is that it is continued within the skeletal muscle fiber as numerous long, tubular invaginations resembling tunnels that intertwine among the myofibrils called T tubules

Q:

location of T/transverse tubules?

A:

plane of the junction of the A and I bands

Q:

what is a triad in the muscle? main function?

A:

T tubule flanked by 2 terminal cisternae of sarcoplasmic reticulum

allows depolarization wave to spread

Q:

myofibrils are held in register with one another by __________ intermediate filament?

A:

desmin-postnatal

vimentin-embryo

Mehr Karteikarten anzeigen
Q:

how is desmin attached to the Z lines of sarcomeres?

A:

plectin

Q:

which protein ensures the protection of the bond between desmin and the Z line?

A:

αβ- crystallin

Q:

what are costameres?

A:

The peripheral-most bundles of myofibrils located just adjacent to the sarcolemma are tethered by desmin

of the sarcolemma, filaments to specific locations on the cytoplasmic aspect known as costameres 

Q:

costameres are rich in which protein complex?

A:

dystrophin-associated glycoprotein complex

Q:

proteins in dystrophin-associated glycoprotein complex?

A:

dystrophin, dystroglycan complex, sarcoglycan complex, dystrobrevin, syntrophin

Q:

describe dystrophin and its attachments. its function?

A:
  • one end is attached to the actin filaments of the cytoskeleton adjacent to the sarcolemma, whereas the other end is attached to dystrobrevins, to the β subunit of the dystroglycan molecule, and to syntrophins 
  • protects the sarcolemma from injury during
    muscle contraction
Q:

what kind of tissue forms epimysium, perimysium and endomysium?

A:

epi-dense irregular collagenous tissue

peri-less dense collagenous connective tissue derived from epimysium

endo-reticular fibers and external lamina/basal lamina

Muscle

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