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Histology > Muscular > Flashcards

Muscular Flashcards

1
Q

What are the three muscle types?

A

Cardiac
Smooth
Skeletal

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2
Q

Plasma Membrane of the muscle cell

A

Sarcolemma

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3
Q

Cytoplasm of the muscle cell

A

Sarcoplasm

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4
Q

Smooth ER o muscle cell

A

Sarcoplasmic Reticulum

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5
Q

Which muscle type contains intercalated discs?

A

Cardiac Muscle

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6
Q

Skeletal Muscle

  • Voluntary?
  • Striated?
  • Mono- Nucleated or Multi-Nucleated?
A

Voluntary
Striated
Multi-Nucleated

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7
Q

Cardiac Muscle

  • Voluntary?
  • Striated?
  • Mono- Nucleated or Multi-Nucleated?
A

Involuntary
Striated
Mono-nucleated

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8
Q

Smooth Muscle

  • Voluntary?
  • Striated?
  • Mono- Nucleated or Multi-Nucleated?
A

Involuntary
Non-Striated
Mono-Nucleated

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9
Q

Which week of development do skeletal muscles contract by?

A

7th week

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10
Q

Which cell reserve myoblasts that can form new skeletal muscle?

A

Satellite Cells

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11
Q

Compare Atrophy vs. Dystrophy

A

Atrophy -> decrease in muscle diameter when not used

Dystrophy -> increase in muscle diameter during continuous use

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12
Q

What are the connective coverings of Skeletal Muscle and what do they cover?

A

Epineurium- Covers muscle
Perineurium - Covers muscle fascicle (bundle of fibers)
Endoneurium- Covers muscle fiber

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13
Q

What is a sarcomere?

A

Arrangement of myofibrils

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14
Q

Which staining is used in Skeletal Muscle?

A

H&E STAINING

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15
Q

What structure covers the Myofibril?

A

Sarcoplasmic Reticulum

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16
Q

Fx. of actin & myosin

A

Contraction

17
Q

Z-Line

A

between adjacent sarcomeres

18
Q

M-Line

A

connects thick filament lines

19
Q

H-Zone

A

Contains thick filaments

20
Q

Zone of Overlap

A

Overlap of thick & thin filaments

21
Q

A-Band

A

Dark Band

Thick/Thin Filaments

22
Q

I-Band

A

Light Band

Thin Filaments

23
Q

What are thin filaments composed of?

A

Actin, Nebulin, Troponin, Tropomyosin

24
Q

What are thick filaments composed of?

A

Myosin

25
Q

Fx. of Tropomyosin

A

Black active site on Actin

26
Q

What are the fx. of the 3 subunits of Troponin

A

TnT -> binds to tropomyosin
TnI -> Inhibits interaction
TnC -> Capacity to bind to Ca2+; conformationally change the shape of complex

Histology (9 decks)

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