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ANAT-A 215 Exam 2 > Myology > Flashcards

Myology Flashcards

1
Q

Myology Definition

A

Study of muscles

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2
Q

Skeletal Muscle Composed Of

A

Made up of muscle fibers. Each skeletal muscle is an organ.

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3
Q

Functions of Skeletal Muscle

A 
Body Movement
Maintenance of Posture
Temperature Regulation
Storage and Movement of Materials
Support
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4
Q

Tendons

A

Dense Regular CT
Aponeuroses
Connect muscles to bone

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5
Q

Aponeuroses

A

Flattened, sheetlike tendons

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6
Q

Muscle fiber wrapped around what?

A

Endomysium

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7
Q

Fascicles

A

Groups of muscle fibers

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8
Q

Fasicle surronded by?

A

Perimysium

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9
Q

Muscle surronded by?

A

Epimysium

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10
Q

What surrounds the CT Wrappings?

A

Deep Fascia

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11
Q

Superficial Fascia Location

A

Superficial Fascia superficial to deep fascia

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12
Q

Sacrolemma

A

Muscle cell membrane, surrounds the muscle cell

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13
Q

Sacroplasm

A

Cytoplasm within the muscle cell

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14
Q

Sacroplasmic Reticulum

A

It has cell organelles like lysosomes, ribosomes, and endoplasmic reticulum

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15
Q

Sacroplasmic Reticulum Functions

A

Stores Calcium ions (Ca2+) and releases them when the muscle contracts

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16
Q

Transverse Tubules (T-Tubules) Function

A

Conducts nerve impulse quickly from sacrolemma through muscle fiber

17
Q

Muscle fiber primarily composed of?

A

Myofibrils

18
Q

Myofibrils

A

Run the length of muscle, as long as muscle fiber

19
Q

Myofibril composed of?

A

Myofilaments

20
Q

Myofilaments

A

Need to run length of muscle. Protein filaments

21
Q

Thick Myofilaments name?

A

Myosin

22
Q

Thick Myofilament

A

Each thick myofilament surrounded by six thin myofilaments

23
Q

Thin Myofilaments name??

A

Actin

24
Q

Light Bands Name

A

I Bands

25
Q

I Band Components

A

Thin Myofilaments only
Thin doesn’t block light
Shortens when contracted

26
Q

Dark Bands Name

A

A Bands

27
Q

A Bands Components

A

Thick and Thin Myofilaments
Can block more light
Doesn’t shorten

28
Q

Dark structure in the middle of an I Band?

A

Z Disc

29
Q

Z Disc

A

Dark structure in the middle of an I Band
Thin myofilaments attach
Doesnt Shortens when contracted

30
Q

H Zone

A

Lighter, Central Region in the Middle of A Band

Shortens when contracted

31
Q

What kind of filaments are in H Zone

A

Thick Myofilaments

32
Q

M Line

A

Dark Line in middle of H Zone

Doesnt Shortens when contracted

33
Q

What kind of Filaments attach to M Line

A

Thick Myofilaments

34
Q

Sacromere

A

Runs from Z Disc to Z Disc
Muscle will contract from one Z Dick to Another
Many Sacromeres along length of muscle fiber
Shortens when contracted

35
Q

Sliding Filament Model of Contraction

A

Thick and thin myofilaments slide over one another
When muscles contract, they begin to overlap
Sacromeres shorten, H Zones Narrow, I Bands Narrow

36
Q

Muscle Components from smallest subunits to the largest

A 
Myofilament
Myofibril
Muscle Fiber
Fascicle
Muscle

ANAT-A 215 Exam 2 (13 decks)

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