Muscle Mechanics and Control Flashcards Preview

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Flashcards in Muscle Mechanics and Control Deck (88)
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1

Outermost tissue of skeletal muscle, forms the overcoat of the muscle and helps to separate it from other muscles

Epimysium

2

Continues past the fleshy part of muscle to help form its attachment to the bone

Epimysium

3

Within each skeletal muscle, surrounds a group of muscle fibers or muscles cells which are held together.

Perimysium

4

Each group of muscle fibers or cells that is wrapped by the perimysium

Fascicles

5

Within each fascicle are

muscle cells/fibers

6

Connective tissue which surrounds muscle fibers and goes between each one within fascicles

Endomysium

7

Connective tissue sheets also provide entry and exit routes for blood vessels and nerve fibers that serve the muscle, these bloods vessels and fibers are called

Neurovascular bundle

8

Important for the activity of skeletal muscle because skeletal muscle is completely dependent upon the nerves, aka innervation

Neurovascular Bundle (Nerve Supply)

9

Normally a muscle is supplied by one nerve, which may supply only one, two, or several muscles?

Several muscles

10

T/F: Skeletal muscle tissues is striated

True

11

Endomysium, Perimysium, and Epimysium form these 4 types of muscle attachments

Tendons
Apopneurosis
Fleshy Attachments
Dermal Attachments

12

Extensions of connective tissue sheaths, forming a cord like attachment to outer covering of bone, periostium

Tendons

13

Tendons are usually marked by what structure on bone?

Tubercle

14

Type of attachment that is a broad sheet of connective tissue for the attachment of a muscle

Apopneurosis

15

Attaches and forms a ridge like or line on skeletal structure it attaches to, but may also attach do dermis of skin

Apopneurosis

16

Muscle fibers continue almost to the bone, there is very little connective tissue.

Fleshy Attachments

17

Fleshy attachments occur where bone is like this, because the forces are widely distributed along attachment site, rather than one location

Smooth

18

Muscle fibers attach to the connective tissue of the dermis of the skin (like muscles of facial expression)

Dermal Attachments

19

Gives the shape to muscles

Fascicle arrangement

20

The strength of muscle and direction in which the pulled are determined by the orientation of...

The fascicles

21

A feather shaped type of muscle fibers

Pennate

22

All muscles attach from one side

Unipennate

23

All muscles attach from two sides

Bipennate

24

Shaped like a bunch of feathers converged on a single point

Arranged diagonally causes slight reduction of force, but more fibers meaning more cross sectional area and overall greater strength

Multipennate

25

Fan shaped fibers, broad origin and narrow insertion. Strong because fascicles exert tension on relatively small insertion

Convergent

26

Sphincter forming rings around body openings

Circular

27

Thick in the middle and taper on both ends, forming a belly in the middle. Contractions are moderately strong.

Fusiform

28

Long straplike muscles of uniform width and parallel fasicles. Small cross section. Spread over long distances and shorten more, but small cross section.

Parallel

29

What gives muscles their strength

Cross sectional area

30

Longer muscles can shorten more, and more parallel.

Ok, but they're not very powerful