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Muscular System > Muscular System > Flashcards

Muscular System Flashcards

1
Q

Functions of Muscle

A

Movement, Stability, control openings, heat production(85%), glycemic control

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2
Q

Characteristics of muscle

A

Excitability, conductivity, contractility, extensibility, elasticity

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3
Q

Types of muscle tissue

A

Smooth/Involuntary, Cardiac, Skeletal/Voluntary

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4
Q

Smooth/Involuntary Muscle characteristics

A

uninucleated, fusiform shape, no striation, slow sustained contraction

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5
Q

Cardiac Muscle characteristics

A

Uninucleated, branched cells, striations, interclated discs, autorhythmic

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6
Q

Skeletal/Voluntary Characteristics

A

Multinicleated, long cells, striations, respond to nerve stimulation

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7
Q

Myofiber

A

Skeletal muscle cell

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8
Q

Sarcolemma

A

Cell membrane of muscle cell

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9
Q

Sarcoplasmic Reticulum

A

Endoplasmoc Reticulum of muscle cell

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10
Q

Terminal Cisterns

A

End savs on sarcoplasmic reticulum

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11
Q

Transverse tubules

A

Inavginstions of sarcolemma

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12
Q

Componets of muscle

Largest to Smallest

A
  1. Muscle
  2. Fasicles
  3. Muscle fiber
  4. Myofibrils
  5. Myofilaments
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13
Q

Sarcomere Componets

A 
Actin filaments (Thin)
Myosin filaments (Thick)
Dystrophin: Links actin go sarcolemma
Troponin tropomyosin complex: Cover active sites on actin
Z disc
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14
Q

Muscle Coverings (Smallest to Largest)

A
  1. Sarcolemma
  2. Endomysium
  3. Permysium
  4. Epimysium
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15
Q

Sarcolemma(Covering functions)

A

Cell membrane to muscle fiber

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16
Q

Endomysium

A

Areolar connective, surrounds myofiber

17
Q

Perimysium

A

Dense irregular connective, covers fasicles

18
Q

Epimysium

A

Dense irregular comnective, covers all muscle till tendon

19
Q

A band

A

Dark; myosin overlaps myosin/actin filaments

20
Q

H bands

A

Middle of A, ONLY myosin filament

21
Q

I band

A

Light, ONLY actin

22
Q

Z line

A

Attachment point for actin filaments, marks sarcomere

23
Q

Motor unit

A
  • One somatic nerve fiber and all myofibers innervated by that nerve
  • Somatic nerve fires and stimulates all myofibers
  • Strength of contraction depends on how many units called

Muscular System (1 decks)

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