Ch 9 Flashcards

1
Q

What is the general function of skeletal muscles?

A

attach to bones and skin of face

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2
Q

Voluntary or involuntary?

A

voluntary

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3
Q

What 4 things are skeletal muscles composed of?

A
  • skeletal muscle tissue
  • nervous tissue
  • blood
  • connective tissue
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4
Q

Covers each muscle:

A

fascia

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5
Q

Attach muscle to bone:

A

tendons

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6
Q

Sheets that connect muscle in trunk and head:

A

aponeuroses

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7
Q

(muscle covering) Surrounds whole muscle:

A

epimysium

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8
Q

(muscle covering) Surrounds fascicles within a muscle:

A

perimysium

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9
Q

(muscle covering) Surrounds muscle fibers within a fascicle:

A

endomysium

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10
Q

List the 5 connective tissue covering things from biggest to smallest.

A

Muscle——> Fascicles—–> Muscle fibers (cells)—–> Myofibrils—–> Thick and thin filaments

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11
Q

Structures containing the contractile proteins actin and myosin:

A

thick and thin filaments

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12
Q

Overlapping parallel groups of thick and thin filaments in a repeating pattern; the underlying basis for the striation pattern:

A

myofibril

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13
Q

A single muscle cell, multinucleate and may be many centimeters long:

A

muscle fiber

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14
Q

A bundle of muscle fibers within a muscle:

A

fascicle

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15
Q

A bundle of fascicles:

A

muscle

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16
Q

Where are thick and thin filaments located?

A

intracellular

17
Q

Where are myofibrils located?

A

intracellular

18
Q

Where are muscle fibers located?

A

in a muscle, surrounded by endomysium

19
Q

Where are fascicles located?

A

in a muscle, surrounded by perimysium

20
Q

Where are muscles located?

A

surrounded by epimysium

21
Q

Skeletal muscle fibers=

A

muscle cell

22
Q

What kind of nucleus do muscle fibers have?

A

multinucleated

23
Q

(skeletal muscle fibers) Sarcolemma:

A

membrane

24
Q

(skeletal muscle fibers) Sarcoplasm:

A

cytoplasm

25
Q

(skeletal muscle fibers) Sarcomeres:

A

contractile unites

26
Q

(skeletal muscle fibers) Sarcoplasmic reticulum:

A

specialized ER and stores calcium ions

27
Q

(skeletal muscle fibers) Transverse tubule:

A

sarcolemma goes deep into muscle fibers

28
Q

(skeletal muscle fibers) Triad:

A

1 T tubule and 2 SR cisternae

29
Q

What do skeletal muscle fibers contain a lot of?

A

myofibrils

30
Q

What 2 things do myofibrils consist of?

A
  • thin actin filament

- thick myosin filaments