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Flashcards in muscular test Deck (38):
1

muscle found in heart

cardiac

2

prime mover , muscle that contracts

agonist

3

Responds to electrical changes

Excitability

4

muscle that assists primary mover

synergist

5

muscle cells extend or stretch when opposing muscle is contracted

extensibility

6

oppose the agonist

antagonistic

7

muscle found everywhere (involuntary)

smooth

8

muscle cells shorten when contracted

contractility

9

attachment point that doesn't move (proximal end )

Origin

10

joint that is freely moveable

diarthrosis

11

joint that's fixed together

synarthosis

12

fluid filled synovial cavity

synovial joint

13

joins bone to bone

ligament

14

slightly moveable joint

amphiarthrosis

15

connects muscle to bone

tendon

16

what does the synovial joint provide

lubrication , absorbs shock, provides nutrients and bursa

17

what are the functions of skeletal muscle

move body
posture/ organ support
bring blood to heart

18

attachment point where bone moves (distal end)

Insertion

19

largest muscle organization

Muscle

20

lowest part in muscle organization

myofilament

21

what comes after a myofilament

myofibril

22

what comes before muscle

fascicle

23

what comes after myofibril

muscle fiber

24

theory of how a muscle contracts

sliding filament theory

25

what is an I band

area of only actin

26

what is a Z disc

marks the end of one contractile unit

27

Peristalsis

propels food down pathway

28

what is an A band

entire length of band(myosin)

29

place where neuron meets a skeletal muscle fiber

Neuromuscular Junction

30

once threshold is met all muscle fibers that are innervated by that neuron will contract

All or none principal

31

ATP used to detach myosin head and actin moves back to position

6th step to muscle contraction

32

acetylcholine binds to muscle, releasing calcium

2nd step in muscle contraction

33

myosin head attaches to actin at new opening

4th step in muscle contraction

34

nerve impulses reach Neuromuscular Junction, stimulating acetylcholine release

1st step in muscular contraction

35

myosin head conducts a powerstroke moving actin

5th step in muscle contraction

36

calcium binds to troponin, creating a site for binding of myosin head

3rd step in muscle contraction

37

fast twitch, or white fibers
large in diameter
good for short burst of power

type llb

38

slow twitch or red fibers
small in diameter
aerobic
slower movement like jogging

type l